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Support XFINITY Internet Find Your Cable Modem MAC Address

Introduction

All you need to do is follow the steps outlined here.

The cable modem (or eMTA if you have XFINITY Voice) MAC address is a twelve-character alphanumeric identifier. It is usually found on the back of your cable modem. The MAC address is identified by one of the following prefixes:

  • CABLE
  • CABLE RF MAC
  • CM
  • CM MAC
  • CMAC
  • HFC MAC
  • RF
  • RF MAC

RF MAC: 0013F73835C6 on first line / RG MAC:0013F73835CA on second line  

Depending on the type of device, you may see multiple MAC addresses. In this example, the cable modem MAC address is listed on top (the "RF MAC").

Find this article at:

http://customer.comcast.com/help-and-support/internet/find-your-cable-modem-mac-address/