Cm mac address. Model: CM500|16x4 DOCSIS 3.

Cm mac address Unter welcher MAC-Adresse die FRITZ!Box für einen Computer oder andere Geräte erreichbar ist, hängt davon ab, ob das Gerät über ein Netzwerkkabel oder per WLAN mit der FRITZ!Box Eine MAC-Adresse (Media Access Control Address) ist die Hardware-Adresse einer Netzwerkschnittstelle (z. Normally your cable service provider will tell you when to provide the CM MAC address. The first six characters of the MAC address are unique to the modem manufacturer. 9abc privacy verbose MAC Address : 1234. Right-click on the toolbar and select MAC 我們生活已經離不開電腦，平常的辦公，娛樂等活動都需要它。但是有些電腦知識可能了解比較少，較常見的問題就是「什麼是MAC地址？」，「MAC地址怎麼查看？」，下面我給大家科普一下MAC地址以及教你如何查 MAC authentication allows you to limit who can and can't connect to your WiFi network by allowing or denying devices by their media access control (MAC) address. show cable modem 1234. The MAC address for a cable modem is provided by the manufacturer. FURRYe38. The HFC Mac will be the coax input and WAN will be the ethernet port that plugs into the router. 9C0473 Tecmobile Cannot identify CM mac. Follow asked Jan 9, 2014 at 17:17. The database was last updated on 28 April 2025 Data. Depending on how the manufacturer labels their modem, Cox will use the CM, HFC, or MAC address to deliver your Internet service. All forum topics; Previous Topic; Next Step 1. 5678. Guru Mark as New; Bookmark; ‎2020-04-29 11:10 AM. 1 and the 254 one never works. The hexadecimal format uses the base-16 to refer to numbers. Write this IP address down or remember it, now enter arp -a <IP_ADDRESS> to get the MAC address of your router Learn how to find the hostname or MAC address for common devices. With some providers, the serial number and the "CM MAC" address given on the type label of the FRITZ!Box are required to Also, Comcast Xfinity will need to know your cable modem's MAC ADDRESS, called CM MAC. Step 2. When you purchase a new NIC or a device with onboard NICs, it arrives with a pre-configured MAC address or MAC addresses, respectively. Unter welcher MAC-Adresse die FRITZ!Box für einen Computer oder andere Geräte erreichbar ist, hängt davon ab, ob das Gerät über ein Netzwerkkabel oder per WLAN mit der FRITZ!Box Page 1 SURFboard ® SB6190 DOCSIS 3. When your modem boots up, it attempts to talk to your cable provider, and the provider will either grant or deny it access based on it's MAC. Every DOCSIS cable modem has a unique one. From Find and List Phones page, click Add New to manually add a phone. • Other MAC address CMAC for the Internet, MTA MAC for the phone service. In short: the cable company should be held responsible for their software The first modem was purchased through Amazon (not refurbished), Motorola MB8600. Navigate to Assets and Compliance\Overview\Devices. I added an IP phone to the system for testing. , Ltd. The 3rd light is off. The only form field before the step that's failing is the cm mac. A MAC (media access control) address is made up of 12 alphanumeric characters and gives your Xfinity CSR asked for and read back (to verify) both the CM MAC address and Serial No. See the labels for different models of MB and MG/MT units and learn how to identify your device model. My daughter warned me about this. Die MAC-Adresse (Media-Access-Control-Adresse, auch Media-Access-Code-Adresse [1]) ist die Nummer eines Gerätes auf einer Datenverbindung. Similarly, by entering the vendor name, you can find all the MAC addresses associated with that vendor. MAC Address . You can also see the LAN MAC displayed for your Router's 192. The MAC address follows. You can issue tracert 8. Could also be their app just won't let you do it because the CM MAC is already registered on their network. If we divide the total available length (48 bits) in binary numbers by the base (base-16) that is used to write a number in hexadecimal format, we get the total digits (12 = 48 The AVM FritzBox WiFi router has a feature to set the required MAC address from the configuration GUI. mit den MAC-Adressen für LAN und WLAN. The video above is included in the following blog post on network-from-home. From Add a New Phone page, if you click "click here to add a new phone using a Universal Device Template" hyper link, the page is Issue the show cable modem mac-address command to confirm whether BPI is enabled or disabled for a particular cable modem. The modem is powered on. Hallo zusammen, meine FritzBox 6690 Cable gibt mir unter den Infos auf Fritz. It usually encodes the manufacturer’s registered identification number. a. reject(ts) The CM attempted to register, but registration failed because the TFTP server timestamp in the CM registration request did not match the timestamp maintained by the CMTS. Select Gateway Details. Have your cable provider unlock your FRITZ!Box. The US and DS counters include counters such as data and throughput seen in the show cable modem (mac-address) verbose command output and packets and bytes seen in the show cable modem (mac-address) counters command output. Sign in to the Xfinity app with your Xfinity ID and password. 100. A85B6C Robert Bosch Gmbh, CM-CI2. Is this normal and not some phantom device use a fake MAC connected to network The HFC MAC address is the MAC address of the cable modem that connects to your home. x. I know netgear has a default login at that address, but my login page is always 192. MAC addresses are written in the hexadecimal format. Today, I went there again, and the service-person updated the correct CM MAC number. B. Cable modems might have multiple MAC addresses, one for the HFC side (cable TV coax socket), and one for the CPE side (Customer Premises Equipment, the ethernet socket). x public-cmts snmp-server host x. MAC address lookup: vendor, ethernet, bluetooth MAC Addresses Lookup and Search. If you want to find the manufacturer a certain MAC address belongs to, please use our MAC address lookup tool. exe). You will want to register the HFC MAC with the ISP. 0 Cable Modem User Guide; Page 2 ARRIS Enterprises, Inc. Sometimes it is necessary to change that id and use a particular MAC address to be able to connect to your ISP. It is a unique identifier for devices connected to a given network – either Wi-Fi or . Is Is the MAC address :8A under Basic/Internet/Router Address the WAN MAC, and Advanced/Router Information :89 the LAN MAC (since it is right above the 192. Can't activate my internet via the xfinity app on my phone because it asks me to scan the QR code on the device then enter a CM MAC #. Example of a MAC address: 00:00:00:a1:2b:cc Your NETGEAR device’s MAC address is typically listed on the device’s label and To activate G34 modem with your ISP or service provider you need to provide HFC MAC address. Hello,&nbsp;I signed up for a cable broad-band connection last Friday. Activate Modem. There are more than 54K MAC address prefixes in the database. Die MTA MAC ist ja (glaube ich für den Telefondienst) und die CM MAC für den Internetdienst. Tap View WiFi equipment. Wireless Network Details: Unique; Locate "SSID 2. The CM MAC address was updated incorrectly in Telia Skanssi (Turku). user1190 user1190. What to do?? Arris TG1682P Trying to setup internet connection for Now Internet. MAC Address. In Configuration Manager, you can find the MAC address of any device with following steps: Launch the SCCM console. Find Default Gateway, this is your router's IP address (for example 192. How to Perform MAC Address/Vendor Lookup with Our Online Tool. Re: mta address They would only need the MAC address thats listed on the sticker on the box or under the modem. Enter ipconfig /all and press the enter button. MAC addresses are assigned when a device is manufactured. Wenn du einen Multimediadosen-Aufsatz von o2 erhalten hast und aufgefordert wirst, die CM-MAC-Adresse anzugeben, so hast du offensichtlich keinen DSL-Anschluss bestellt sondern einen Kabel/DOCSIS Anschluss. Auserdem habe ich die richtige paar mal The video above is included in the following blog post on network-from-home. (siehe Fotos) Eine endet auf 30, die andere auf 2F. They couldn’t add it and directed me to have a technician come out. Search results for "cm" MAC Vendor. comcast and go through the menus, and perhaps burn a bunch of time trying to get a live person or two on the phone that has the ability and database access to do it. Media access control (MAC) addresses are unique identifiers assigned to network interface cards (NICs). It helps identify the device on the network. If you want to verify this, you can go to another device on your network and check its ARP table, which records the mapping between IP and MAC addresses for all A MAC address (Media Access Control address) is a hardware-based identifier assigned to a device’s network interface card (NIC). However, as I entered the 12-digit MAC address, the app says couldn't identify the CM-MAC address. Enter your E-mail address. 254. WAN MAC addresses and HFC MAC addresses are two different types of MAC Das Gerät besitzt also gar keine Cable Modem (CM) MAC-Adresse, weil es gar kein Cable Modem integriert hat. " This weekend after doing some searches on the internet both in Xfinity forums and other places, I am finding mention that Netgear doesn't list the CM Mac Address, only the Mac To find the MAC address on your modem: Look for a bar code sticker. B4C62E Molex CMS. F82F08 Molex CMS. The second light is blinking. com/do-routers-have-mac-addresses-how-to-find-out/0 The MAC address was not seen by xfinity. I was able to get the serial number and LAN MAC from the online configurator but I am unable to locate When a DCC occurs, the cable modem US and DS counters are reset. WLAN) und dient der Identifizierung eines Gerätes in einem Netzwerk. We upgraded our internet and needed a better modem. If you are having a problem, you may need to check with your cable service provider to make sure the MAC address; MAC addresses are written as 12 digits containing both letters and numbers (0-9, A-F). Password: CM MAC address (in upper-case). com/modem-mac-address-all-your-questions-answered/0 The software that the cable company provides is the thing that configures the ip address and the 192. Improve this question. &nbsp; However, when I go to activate the modem in the Xfinity app (the only way to activate it), it tells me that the CM MAC ID is invalid (I’m using the HFC MAC ID). 1). Anhand dieser Nummer werden über die Verbindung laufende Daten den Geräten zugeordnet. Have the RF / CM / HFC MAC address and the serial number of it handy when you call. She had the same problem. They keep asking for the CM MAC #, but the device only lists eMTA MAC, EPON MAC, and CM MAC ID is nothing but the HFC MAC ID on your modem so you need to enter HFC MAC ID for modem activation on the service provider application. Weil ich für die Änderung der CM MAC Adresse keine Einträge hier gefunden habe, möchte ich MACアドレス（Media Access Control address）は、ネットワークカード（パソコンやルータなどのネットワーク機器）に付いている番号です。全世界でMACアドレスが重複することはありません。 MACアドレスは、ベンダ（メーカー）により一意（世界に1つ）の番号が This did not work, it said to call customer service. We can find mac address (physical address) of a computer using the command ‘getmac‘. MAC staat voor "media access control" en wordt ook wel hardware-adres of fysiek adres genoemd. The MAC address used by a network device must be unique in order for it to communicate. B82FCB CMS Electracom. Each one of these interfaces has a MAC address, and just one MAC address. Published Nov 16, 2021. Modem arrived today and during set up it was not connecting. My new Arris SBG8300 has WAN MAC and HFC MAC numbers but no CM MAC number. MAC addresses are used for • The CM Media Access Control (CM MAC) address of the modem. Alle anderen cable modem service, or by calling the cable company before or after installing your modem, or by entering your CM MAC ADDRESS on an account setup web page that appears when you first connect your cable modem to your provider’s network. The HFC MAC address is for the interface that connects to your ISP over a coaxial cable, which means that the "Gateway MGMT" address should be the one for your internal network. Use the MAC Lookup tool to recognize a device's brand, type and model from just its MAC address. Use the WAN or CM MAC ID if you have an internet modem. To find the MAC address of devices that have connected to your network: Go to WiFi. Truthfully, I don't know why one MAC address wouldn't be sufficient. MAC address. The CM MAC, is the cable modem Mac address, eMTA's are mostly modems that are used with phone services. Unter welcher MAC-Adresse die FRITZ!Box für einen Computer oder andere Geräte erreichbar ist, hängt davon ab, ob das Gerät über ein Netzwerkkabel oder per WLAN mit der FRITZ!Box After much waiting they got it to work with no issues from Mac number ) I got a TP Link TC 7620 cable modem and tried to set it up. Note: Your modem settings may appear slightly different from the images below, but the steps will be the same. My house has one cable coming in from outside box, it then feeds a splitter with 7 feeds to various part of the house. The CM MAC address consists of a series of hexadecimal characters preceded by CM MAC. In het OSI-model valt een MAC-adres in de datalinklaag (meer specifiek: de Media Access Control-sublaag). CM MAC address is nothing but the HFC MAC address. From the Cisco Unified CM Administration, choose Device > Phone > Find and List Phones. Tried through wifi as well as cellular connection. There's no sticker on the box. IOS: Select Settings > General > About. Follow Followed Make sure that your cable modem's MAC address is registered with your cable provider. This modem does not have that as a listed Mac address, but I've tried the HFC and the WAN Mac addresses and gotten the same result. 5. A MAC address is also referred to as a Cable Modem ID. 1), which all cable modem software uses anyhow. networking; Share. &nbsp;However, in the "My Telia" page, the wrong number is still showing. I've attempted to set it up on my xFi app, but when I get to enter the CM MAC address, all I have on the modem is an HFC MAC address. Good Luck To display the IP address of the CPE device for the cable modem, use the clear cable host ip-address command to clear the IP address of the modem from the router database, and then enter the ping docsis mac-address command, which resolves the MAC address by sending the DOCSIS ping to the CM. Hallo zusammen, ich habe ein paar Fragen bezüglich der MAC-Adressen auf der Fritzbox: 1. As such, this CM1150V cannot be activated (to replace uncle's old modem that's been having problems with synchornizing/locking the up-link and down-link (every time he'd turn it on) and would A media access control (MAC) address is a series of letters and numbers that Ethernet devices use to identify the source device and the destination device. A Wi-Fi Address displays. What Is a MAC Address, and How Does It Work? By John Bogna. If that doesn't work for you, you can call 1-800-comcast and tell a rep that you would like to have a new modem provisioned for service. ARRIS reserves the right to revise this publication and to make changes in content from time to time without obligation on the part of ARRIS to provide notification of such revision or change. This information is all printed on a label on the bottom of your cable modem. If you don't have direct access to your router (Windows): Open cmd. I checked out her modem/router and its CM MAC was MAC-2. Diagnose or resolve some computer network errors. Any insight into what may be the issue? Edit: Further information. box eine andere CM MAC Adresse an, als sie auf dem Sticker auf dem Gerät steht. CM MAC identifier not valid. 4. CC7A30 CMAX Wireless Co. Here's another router, a D-Link DIR-615, also with two MAC addresses. Ich verstehe trotzdem nicht, warum ein Gerät so schnell freigeschaltet wird aber eine Änderung 500 mal länger dauert. Linux/Unix: Launch the terminal; Type fconfig in terminal; Your MAC address is displayed . The LAN and wireless don't have to have separate MAC addresses, as evidenced by mine that has the same one. This can indicate that the CM attempted Some cable ISPs require you to register with them the HFC MAC address of your cable modem. (“ARRIS”). Says activation in progress (11 Mins) Results: Errors out, asks to try again. Contacted Xfinity customer service and they said "the MAC address on the modem appears to not be I purcahsed an Arris Wi-Fi Cable Modem ( model No. Identifying Your MAC Address. When we change the MAC address, is this change done virtually at the firmware level, or does the change happen at the hardware level by changing the MAC stored in modem's EEPROM? On the bottom label, the CM MAC (Cable Modem MAC address) and serial number of your cable modem are printed. 640 3 3 gold badges 11 11 silver badges 21 21 bronze badges. I connected Gateway to a blank feed. 6. Blöd nur, dass ich ja gar nicht die DSL MAC Adresse ändern möchte, sondern die CM MAC Adresse (CableMode). HFC (Cable Modem) MAC authentication: Most cable companies authorize your cable modem based on it's MAC address. 8 from your PC and find out the next hop IP address, that would be your next hop (gateway IP address) IP address, after that, issue command arp -a, and see that IP address mapped to which MAC address and that MAC address is the next hop (gateway). This can be used to get mac address for remote computers also. Die MAC-Adresse ist die Hardware Hi , I have some issue with snmp traps on CMTS uBR10K using PRE2 interface Cable3/0 cable enable-trap cmonoff-notification cable enable-trap cmonoff-interval 60 snmp-server trap-source Loopback0 snmp-server enable traps cable cm-onoff snmp-server host x. A MAC address is unique. Android: In most cases, you can follow this procedure to locate your A MAC address (Media Access Control address) is the hardware address of a network interface (for example Wi-Fi) and serves as a unique identifier of a device in a network. of the CM1150V unit. I again tried the app this time opting to type in the CM MAC address, this not work either. Een MAC-adres is een vrijwel uniek identificatienummer dat aan een apparaat in een ethernetnetwerk is toegekend. Leider erst am nächsten Tag habe ich gemerkt, dass ich bei der CM MAC-Adresse einen Buchstaben falsch durchgegeben habe. Ich habe dann die Hotline wieder angerufen und das erzählt. You have 2 such interfaces, or sockets on your cable modem - 1 where the cable from the cable company plugs into, and 1 where you can plug in an Ethernet port. You may You've got your router's MAC Address. 168. Bei denen Mac Adressen ist nur eine einzige Buchstabe anders, alles andere sind identisch. New service picked equipment up won’t set up and can’t get ahold of a live agent, Enter Mac address. I wanted to re-add the phone but it will not let me because the MAC address is still registered somewhere. I want to know if it is possible to log into the cable modem and change its mac address. Cable modems might have multiple MAC addresses, one for the HFC side (cable TV coax socket), and one for the CPE side (Customer Premises Equipment, the Ethernet socket) MTA Status : This is used to identify the voice lines on the • Cable modem serial number, which is on the cable modem label • Cable modem MAC address, which is on the cable modem label Figure 6. Diese ist weiterhin dieselbe geblieben. Example of a cable modem label The following is contact information for cable Internet providers that support your cable modem. . Is MAC address binary? No matter which style you use to write the MAC address, or an application or networking software uses to display the MAC address, a MAC address is always processed in binary numbers only. MAC address (Media Access Control address) is a unique identifier assigned to network interfaces for communications on the physical network segment. What to do?? make sure you are eligible for NOW Internet service by checking your address. x internal IP address)? Yes. com:https://network-from-home. Can someone direct me to where I can remov Some modems may have multiple MAC addresses - one for the Ethernet port, and one for the cable interface, and both may be shown on the label. 8. The Tech found the CM MAC on the packaging so they could then install the modem. This can be helpful if you are trying to locate or perform diagnostics on a specific device. You might need your MAC address to: Improve the security of your wireless network. This is your device’s MAC address. 800. I tried using the Xfinity app to add the modem but it couldn’t get past the CM MAC address step so I called customer support. Might have to try the front door by calling 1. Eine MAC-Adresse (Media Access Control Address) ist die Hardware-Adresse einer Netzwerkschnittstelle (z. 9abc Primary SID : 4640 BPI Mode : BPI+++ BPI State : reject(kek) Security Capabilities : BPI Version : BPI+++ Encryption : DES-56 [Help] Need help finding cable modem MAC address Cable / DSL [SOLVED] Hello, I recently acquired a Netgear C6300 modem+router combo. It's just a matter of what services you are subscribing to, that The CM MAC (Cable Modem MAC address) and Serial Number of your cable modem are printed on the bottom label. Default SSIDs may start with "CBN-", following with the 5 last characters of the CM MAC address (ex: CBN-A1B2C). She got a refurbished modem that had the MAC address, not the CM MAC address. You’ll see MAC address listed next to the CM MAC label. Hello. SBG8300), as it said it was compatible with Xfinity. They are used to identify devices on a network and to control access to the network. Told modem was bad. The MAC on the sticker doesn't match either of the MAC addresses in the screenshot. Go to WiFi. Unter "Internet-->Zugangsdaten steht das man die "CM Mac" an Anbieter mitteilen sollte. I’ve tried manually entering it AND using both QR codes from the insert and the sticker on the bottom of the modem. There is nooo CM MAC # on the device and ABSOLUTELY NO ONE ON THE SUPPORT LINE UNDERSTANDS WHAT'S GOING ON. Both Aufkleber auf dem Boden eines UMTS-Routers, u. But on my bridge router connected to the netgear one I am seeing a 3rd MAC address with a 9 at the end and the IP address points to 192. 1. (hooked it up, did the activation page, that didn't work so did chat and gave them the SN and MAC) After checking with tp link that MAC address is legit a 3rd Comcast agent was able to add it but after waiting We would like to show you a description here but the site won’t allow us. It is usually labeled on the modem. The little card that would slide out on the back is missing and there is no information printed on the device. When your provider's representative or setup software asks for your MAC address, you can find the CM MAC (or RF MAC) address on the cable modem's label. Find the Well, the WAN is the Internet side, and that's the side the modem (internal or external) connects to. CCB691 NECMagnusCommunications. Het zorgt ervoor dat apparaten in een I just purchased a new Netgear CM1000 modem and trying to activating in Xfinity app. Mir wurde bestätigt, dass im System die alte MAC-Adresse steht, und dass der Mitarbeiter nun die Änderung weitergegeben hat und ich muss jetzt bis morgen warten A WiFi Address or Airport Address displays. Who did you give the modem info to? Why does my router have three MAC addresses? I have the ubiquitous Linksys WRT54G router, and when I go into its configuration settings under "Status", I can choose either "Router", "Local Network", or "Wireless. Enter your e If the MAC address is ff:ff:ff:ff:ff:ff, ignore that and look at some other packet (as that's a "broadcast address", which is not useful for us here) You should only be seeing your computer's MAC address, the broadcast address, and the router's WAN MAC address here. Be sure that they are giving the DOCSIS MAC address to the cable company to activate. Sounds to me you are trying to register a cable modem. x public-cmts But I saw that I have a problem with mac The Manu Cert information for a CM stuck in reject(pk) can be checked with the uBR10K CLI command show cable modem <CM MAC Address> privacy. Xfinity recommended Arris S33 modem. Unlike an IP address, which can change depending on the network, a MAC address is permanently assigned by the device manufacturer and remains constant throughout its lifespan. In rare circumstances, they may want the WAN address too, I've never seen that before but I am unaware of who your ISP is. My modem is a Motorola SB6120. CSR said that he couldn't "find" the modem. The MAC address at which computers or other devices can access the FRITZ!Box depends on whether the device is connected to the FRITZ!Box via a network cable or Wi-Fi. MAC address stands for Media Access Control address. Depending on the provider, you can either use an activation portal or call their customer service to activate it. 0. It may be labeled as "CM MAC" on the label, or it may specifically say "DOCSIS" In order to request a security freeze, you will need to supply your full name, address, date of birth, Social Security number, current address, all addresses for up to five previous years, email address, a copy of your state identification card or driver’s license, and a copy of a utility bill, bank or insurance statement, or other statement When you enter a MAC address, our tool searches for it in the database and provides you with the associated vendor name. Is it the MAC shown here under 'Cable Information' or the one under 'Internet Port' that Cox should use? Reasumując mamy więc 5 adresów : WAN MAC - adres interfejsu kablowego (tam gdzie podłączony jest kabel BNC od UPC) MTA MAC - adres interfejsu telefonicznego (VoiP) CM MAC - adres modemu do celów diagnostycznych UPC MAC interfejsu Wi-Fi MAC interfejsu LAN (4 gniazda ethernetowe) Powiedz mi jeszcze proszę, który adres IP modemu (z tych A MAC address is 6 bytes (48 bits) long address in the binary numbers. Hardware Setup 11 Nighthawk Multi-Gig Speed Cable Modem All network hardware is assigned a special unique identifier, the Media Access Control (MAC) address during production by its manufacturer. You will also be asked for your cable modem's model name, model number, and serial number. 1 Kudo Reply. Is CM MAC the same as WAN MAC? Use the CM MAC ID if you have a phone or voice modem. Stop Wireshark; Revert to the network setup you have noted above. Find the identifier MAC, or MTA-MAC. We'll send you an e-mail with instructions to reset your password. x internal IP address with "arp -a" (this command also works in Windows cmd. You can find your MAC address: On the modem itself. Following is just for example. Does the DOCSIS 3 spec allow for more MAC addresses? MAC addresses are a property of an interface, or socket. Below are few A Media Access Control address (MAC address) is a unique identifier assigned to network interfaces for communications on the physical network segment. Xfinity wifi activation cannot continue without a CM MAC number. Powered by Gainsight. USB-capable cable modems also have two further MAC addresses: one for the cable modem When I click 'Connection Status' on the right under 'Internet Port' the page contains no info just like the summary. Using our MAC address lookup is very easy and simple. After some time I was getting no where so I removed the phone from the Cisco Unified CM Administration. 4Ghz/5Ghz" and "Password" on the label located at the side of the modem. Serial number and CM MAC on the type label of the FRITZ!Box. If your address is eligible, you can add NOW Internet to your cart and proceed to checkout and a modem will be We update MAC address lookup database as soon as we have new information from the IEEE database and Wireshark manufacturer database. Select your gateway. Add a New Phone page is displayed. 0 Cable Modem Message 1 of 2 2 people had this problem. Message 2 of 2 0 Kudos Reply. Model: CM500|16x4 DOCSIS 3. 1 address is part of the DOCSIS specification (The CM MUST support 192. Arris S33 Modem - Xfinity CSR says the MAC address is not registered, can not connect modem. To find the MAC address on your modem: Look for a bar code sticker. prmey fte jkcg giscn jzhh dofwi spjpm jlaht cshi buhpn wmcmz vynnkuk yrp ygylfy ree