AS33668 — CMCS

Network type: residential

AS33668 announces 190 IPv4 prefixes covering 1,857,536 addresses and 75 IPv6 prefixes.

About this network

Comcast Cable Communications (CC04) — one of Comcast's regional ASNs, part of the Xfinity residential network.

What it's used for

• Cable and fibre home internet for US households.

Notable

• An "eyeball" network: addresses here are home connections, commonly behind carrier-grade NAT, not servers.
• Comcast operates several regional ASNs that all roll up to the Xfinity network; the primary one is AS7922.

Interesting

• Regional Comcast ASNs like this reflect the company's growth by acquiring and integrating local cable systems across the country.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 24.127.0.0/16
• 24.128.128.0/17
• 50.76.176.0/20
• 50.77.192.0/18
• 50.185.64.0/18
• 50.192.96.0/19
• 50.197.96.0/19
• 50.199.32.0/20
• 50.202.125.0/24
• 50.203.250.0/24
• 50.204.170.0/24
• 50.206.127.0/24
• 50.207.92.0/24
• 50.210.160.0/19
• 50.217.249.0/24
• 50.220.170.0/24
• 50.221.158.0/24
• 50.223.155.0/24
• 50.226.70.0/24
• 50.227.241.0/24
• 50.228.137.0/24
• 50.229.7.0/24
• 50.232.15.0/24
• 50.233.62.0/24
• 50.233.114.0/24
• 50.238.250.0/24
• 50.239.133.0/24
• 50.241.208.0/20
• 50.245.96.0/19
• 50.247.0.0/19
• 50.249.160.0/19
• 50.252.80.0/20
• 50.253.224.0/19
• 67.167.128.0/18
• 67.172.80.0/20
• 67.177.128.0/19
• 68.32.0.0/18
• 68.32.64.0/19
• 68.32.128.0/19
• 68.32.176.0/20
• 68.32.192.0/19
• 68.34.0.0/17
• 68.34.240.0/20
• 68.36.0.0/15
• 68.40.0.0/15
• 68.42.64.0/18
• 68.42.128.0/17
• 68.43.0.0/16
• 68.46.128.0/18
• 68.48.0.0/15
• 68.51.128.0/17
• 68.54.0.0/20
• 68.54.80.0/20
• 68.54.240.0/20
• 68.55.0.0/16
• 68.56.0.0/16
• 68.58.160.0/19
• 68.58.192.0/18
• 68.59.0.0/19
• 68.60.32.0/19
• 68.60.64.0/18
• 68.60.128.0/18
• 68.60.192.0/20
• 68.61.0.0/16
• 68.62.0.0/18
• 68.62.64.0/19
• 68.62.96.0/20
• 68.83.192.0/20
• 68.84.160.0/19
• 68.85.48.0/23
• 68.85.84.0/23
• 68.85.188.0/23
• 68.85.218.0/24
• 68.85.222.0/23
• 68.85.235.0/24
• 68.86.10.0/23
• 68.86.21.0/24
• 68.86.38.0/24
• 68.86.120.0/22
• 68.86.140.0/23
• 68.87.1.0/24
• 68.87.62.0/24
• 68.87.77.0/24
• 68.87.184.0/21
• 69.136.128.0/19
• 69.137.208.0/20
• 69.139.132.0/23
• 69.139.240.0/22
• 69.139.248.0/22
• 69.139.254.0/23
• 69.241.14.0/24
• 69.241.39.0/24
• 69.241.100.0/23
• 69.242.208.0/20
• 69.244.128.0/18
• 69.252.20.0/23
• 69.252.72.0/24
• 69.252.88.0/21
• 70.88.90.0/23
• 70.88.92.0/23

and 165 more.

Upstream networks

• AS7922 Comcast Cable Communications, LLC
• AS3356 Level 3 Parent, LLC

Downstream networks

• AS26463 Macomb Intermediate School District
• AS62658 City of Wyandotte
• AS33372 Spartan Stores Inc.
• AS394446 Newaygo County Regional Educational Service Agency
• AS10351 Enertron L.L.C.
• AS393256 DTE Energy Company
• AS19880 REALCOMP II LTD.
• AS13325 Michigan State Government
• AS53352 Henry Ford Health System
• AS11115 Otava, LLC
• AS14257 The Iserv Company, LLC
• AS397367 Cranbrook Educational Community
• AS393499 Otava, LLC
• AS396224 NSF International
• AS4208 The Iserv Company, LLC
• AS1438 PIONEER STATE MUTUAL INSURANCE CO.
• AS46674 City of Grand Rapids
• AS401285 MICHIGAN VIRTUAL
• AS402050 GA Business Purchaser LLC
• AS19277 ImageMaster LLC
• AS35928 BECKMAN COULTER, INC.
• AS17003 Zoetis Inc.
• AS36040 Google LLC
• AS397871 City Of Detroit
• AS53775 Sekisui KYDEX, LLC

Adjacent networks

• AS7922 Comcast Cable Communications, LLC
• AS3356 Level 3 Parent, LLC
• AS26463 Macomb Intermediate School District
• AS62658 City of Wyandotte
• AS33372 Spartan Stores Inc.
• AS394446 Newaygo County Regional Educational Service Agency
• AS10351 Enertron L.L.C.
• AS393256 DTE Energy Company
• AS19880 REALCOMP II LTD.
• AS13325 Michigan State Government
• AS11115 Otava, LLC
• AS53352 Henry Ford Health System
• AS14257 The Iserv Company, LLC
• AS397367 Cranbrook Educational Community
• AS393499 Otava, LLC
• AS396224 NSF International
• AS4208 The Iserv Company, LLC
• AS1438 PIONEER STATE MUTUAL INSURANCE CO.
• AS17003 Zoetis Inc.
• AS401285 MICHIGAN VIRTUAL
• AS402050 GA Business Purchaser LLC
• AS19277 ImageMaster LLC
• AS35928 BECKMAN COULTER, INC.
• AS46674 City of Grand Rapids
• AS36040 Google LLC