AS20214 — COMCAST-20214

AS20214 announces 185 IPv4 prefixes covering 1,720,832 addresses and 95 IPv6 prefixes.

About this network

COMCAST-20214 is operated by Comcast Cable Communications, LLC.

What it's used for

• The address space carries residential cable internet traffic, evidenced by reverse DNS entries such as c-76-109-127-254.hsd1.fl.comcast.net and netnames like MIAMI-12 and POMPANO-15.
• With 1,720,832 IPv4 addresses announced across 191 prefixes and only 25 observed neighbours, the high address-to-neighbour ratio indicates a large access or eyeball network rather than a transit provider.

Notable

• Registrants are consistent with the announcer, including Comcast Cable Communications, LLC, Comcast Cable Communications, Inc., and Comcast Cable Communications Holdings, Inc.
• The address inventory is dominated by large /16 blocks in the 76.0.0.0/8 and 66.0.0.0/8 ranges, with a single outlier netname TELEMATICS registered to Telematics International for 147.137.0.0/16.

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

Announced prefixes

• 23.24.160.0/19
• 23.31.0.0/18
• 24.124.144.0/22
• 24.153.64.0/22
• 50.73.0.0/21
• 50.73.128.0/19
• 50.76.148.0/23
• 50.76.232.0/21
• 50.77.5.0/24
• 50.77.112.0/20
• 50.78.112.0/20
• 50.79.72.0/21
• 50.79.144.0/21
• 50.150.146.0/24
• 50.185.128.0/17
• 50.192.128.0/18
• 50.196.64.0/19
• 50.198.240.0/20
• 50.199.48.0/20
• 50.200.25.0/24
• 50.200.159.0/24
• 50.202.4.0/24
• 50.202.167.0/24
• 50.202.227.0/24
• 50.205.246.0/23
• 50.216.237.0/24
• 50.222.172.0/24
• 50.224.11.0/24
• 50.224.22.0/24
• 50.224.86.0/24
• 50.224.249.0/24
• 50.229.72.0/24
• 50.233.138.0/23
• 50.237.82.0/24
• 50.237.224.0/24
• 50.240.32.0/19
• 50.241.224.0/19
• 50.242.160.0/20
• 50.243.224.0/19
• 50.244.128.0/18
• 50.248.0.0/18
• 50.250.64.0/18
• 50.253.128.0/18
• 64.139.77.0/24
• 65.34.128.0/17
• 66.176.0.0/16
• 66.177.208.0/20
• 66.177.240.0/20
• 66.208.217.0/24
• 66.208.238.0/23
• 66.229.0.0/16
• 67.172.64.0/20
• 67.191.0.0/18
• 67.191.64.0/19
• 67.191.112.0/20
• 68.85.82.0/23
• 68.85.124.0/22
• 68.85.219.0/24
• 68.85.228.0/22
• 68.86.22.0/24
• 68.86.47.0/24
• 68.86.56.0/24
• 68.86.160.0/22
• 68.86.164.0/23
• 68.87.162.0/24
• 69.137.160.0/20
• 69.138.96.0/20
• 69.139.180.0/22
• 69.139.225.0/24
• 69.180.96.0/19
• 69.241.6.0/23
• 69.241.20.0/24
• 69.241.92.0/24
• 69.247.224.0/20
• 69.252.24.0/22
• 69.252.40.0/23
• 69.252.84.0/23
• 69.252.214.0/23
• 69.254.16.0/20
• 70.88.36.0/22
• 70.88.51.0/24
• 70.89.88.0/24
• 70.89.96.0/21
• 70.90.56.0/21
• 70.91.112.0/22
• 71.26.96.0/19
• 71.27.192.0/18
• 71.57.128.0/18
• 71.196.0.0/17
• 71.199.208.0/20
• 71.206.64.0/19
• 71.229.96.0/19
• 74.92.200.0/22
• 74.92.247.0/24
• 74.95.56.0/22
• 74.95.136.0/22
• 75.74.0.0/16
• 75.144.100.0/22
• 75.144.120.0/21
• 75.144.208.0/20

and 180 more.

Upstream networks

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

Downstream networks

• AS63415 Great Healthworks, Inc
• AS19899 Miami Dade College
• AS36040 Google LLC
• AS54113 Fastly, Inc.
• AS17035 NBCUniversal
• AS393843 WPLG-TV
• AS398044 Trinity Network Solutions
• AS22032 Ocean Reef Club, Inc.
• AS399241 Ocean Bank
• AS16423 NETTOGO
• AS396235 Town of Davie
• AS31812 Palm Beach County Sheriff's Office
• AS401671 ACCESSPARKS LLC
• AS401691 UNIVERSAL HEALTH SERVICES
• AS33580 Venturetech Solutions, LLC
• AS401195 Broward Sheriff's Office
• AS62958 ADT LLC
• AS402232 ADMA BIOMANUFACTURING, LLC
• AS395619 The College of Florida Keys
• AS4890 Richline Group Inc
• AS14310 Safra National Bank Of New York
• AS402211 UNIVERSAL HEALTH SERVICES
• AS53294 Fox News Channel

Adjacent networks

• AS7922 Comcast Cable Communications, LLC
• AS3356 Level 3 Parent, LLC
• AS63415 Great Healthworks, Inc
• AS19899 Miami Dade College
• AS36040 Google LLC
• AS54113 Fastly, Inc.
• AS17035 NBCUniversal
• AS393843 WPLG-TV
• AS398044 Trinity Network Solutions
• AS22032 Ocean Reef Club, Inc.
• AS399241 Ocean Bank
• AS16423 NETTOGO
• AS396235 Town of Davie
• AS31812 Palm Beach County Sheriff's Office
• AS401671 ACCESSPARKS LLC
• AS401691 UNIVERSAL HEALTH SERVICES
• AS33580 Venturetech Solutions, LLC
• AS401195 Broward Sheriff's Office
• AS62958 ADT LLC
• AS395619 The College of Florida Keys
• AS402232 ADMA BIOMANUFACTURING, LLC
• AS14310 Safra National Bank Of New York
• AS4890 Richline Group Inc
• AS402211 UNIVERSAL HEALTH SERVICES
• AS53294 Fox News Channel