AS33659 — CMCS

AS33659 announces 131 IPv4 prefixes covering 1,147,136 addresses and 125 IPv6 prefixes.

About this network

The AS handle CMCS is held 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-76-116-255-255.hsd1.nj.comcast.net and netnames like PA-36 and NJ-31.
• With 1,147,136 IPv4 addresses announced across 131 prefixes and 88 observed neighbours, the high address-to-neighbour ratio indicates a large-scale access network rather than a transit provider.

Notable

• Registrants are consistent with the announcer, appearing as Comcast Cable Communications, Inc. or Comcast Cable Communications, LLC across the sampled prefixes.
• The inventory is finely subdivided into regional blocks, with netnames referencing specific states and cities such as PHILADELPHIA-CBC-25, NEWJERSEY-CBC-35, and NJ-SMB-1.

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

Announced prefixes

• 9.142.0.0/19
• 23.24.64.0/19
• 23.30.96.0/19
• 23.31.224.0/20
• 24.0.0.0/16
• 24.124.224.0/21
• 45.58.208.0/24
• 45.248.54.0/24
• 50.77.8.0/21
• 50.77.64.0/21
• 50.78.48.0/20
• 50.78.144.0/20
• 50.79.96.0/21
• 50.184.64.0/18
• 50.188.192.0/18
• 50.192.224.0/19
• 50.195.96.0/19
• 50.198.224.0/20
• 50.199.144.0/20
• 50.207.78.0/24
• 50.208.96.0/19
• 50.210.224.0/19
• 50.213.64.0/19
• 50.215.128.0/19
• 50.223.132.0/24
• 50.228.255.0/24
• 50.229.146.0/24
• 50.231.89.0/24
• 50.231.144.0/24
• 50.231.154.0/24
• 50.231.216.0/24
• 50.235.249.0/24
• 50.238.108.0/23
• 50.242.0.0/19
• 50.243.64.0/19
• 50.245.192.0/19
• 50.248.128.0/18
• 50.254.64.0/19
• 63.246.150.0/24
• 64.253.90.0/24
• 66.208.236.0/23
• 68.83.0.0/17
• 68.84.224.0/20
• 68.85.3.0/24
• 68.85.7.0/24
• 68.85.35.0/24
• 68.85.62.0/23
• 68.85.76.0/23
• 68.85.116.0/22
• 68.85.128.0/23
• 68.86.6.0/23
• 68.86.50.0/24
• 68.86.152.0/24
• 68.86.154.0/23
• 68.86.157.0/24
• 68.86.158.0/24
• 68.86.192.0/24
• 68.86.209.0/24
• 68.86.210.0/24
• 68.86.212.0/24
• 68.86.215.0/24
• 68.86.220.0/22
• 68.87.214.0/24
• 68.234.42.0/24
• 69.30.72.0/22
• 69.30.76.0/23
• 69.91.139.0/24
• 69.136.96.0/20
• 69.136.240.0/20
• 69.141.0.0/16
• 69.142.0.0/16
• 69.241.68.0/22
• 69.244.96.0/19
• 69.248.0.0/16
• 69.252.86.0/23
• 70.89.32.0/20
• 70.89.92.0/22
• 70.90.0.0/19
• 71.24.64.0/18
• 71.58.32.0/19
• 71.59.64.0/18
• 71.226.192.0/18
• 74.92.64.0/18
• 74.92.232.0/21
• 74.93.120.0/24
• 75.150.128.0/18
• 76.116.0.0/15
• 78.31.205.0/24
• 96.65.0.0/19
• 96.67.128.0/19
• 96.72.192.0/19
• 96.75.160.0/19
• 96.80.128.0/19
• 96.82.128.0/18
• 96.88.160.0/19
• 96.90.128.0/19
• 96.93.128.0/19
• 96.96.16.0/23
• 96.96.88.0/22
• 96.96.152.0/21

and 156 more.

Upstream networks

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

Downstream networks

• AS21669 New Jersey State Library
• AS13913 Affiliated Monitoring, Inc.
• AS19677 NJTRANSIT
• AS30302 ASPEN DENTAL MANAGEMENT, INC.
• AS11205 City of Philadelphia
• AS397380 Temple University Health System, Inc.
• AS397589 AMEREAM NJP, LLC
• AS36040 Google LLC
• AS54986 1-800-Flowers.com, Inc.
• AS16958 Bucks County Intermediate Unit #22
• AS18583 Hatteras CPC
• AS46424 New Jersey Turnpike Authority
• AS394206 Deborah Heart and Lung Center
• AS22774 -Reserved AS-
• AS54282 Johnson & Johnson
• AS394096 Cape Regional Medical Center, Inc.
• AS30597 A.M. Best Company
• AS26142 MANNINGTON MILLS
• AS63193 Atlanticare Health System Inc.
• AS19576 Eastern University
• AS397986 Pennsylvania Convention Center Authority
• AS402703 Atlantic
• AS14539 Vantage Labs LLC
• AS26450 CTDI
• AS53291 WSFS Bank

Adjacent networks

• AS7922 Comcast Cable Communications, LLC
• AS3356 Level 3 Parent, LLC
• AS21669 New Jersey State Library
• AS13913 Affiliated Monitoring, Inc.
• AS19677 NJTRANSIT
• AS30302 ASPEN DENTAL MANAGEMENT, INC.
• AS11205 City of Philadelphia
• AS397380 Temple University Health System, Inc.
• AS397589 AMEREAM NJP, LLC
• AS36040 Google LLC
• AS54986 1-800-Flowers.com, Inc.
• AS16958 Bucks County Intermediate Unit #22
• AS18583 Hatteras CPC
• AS54282 Johnson & Johnson
• AS46424 New Jersey Turnpike Authority
• AS394206 Deborah Heart and Lung Center
• AS22774 -Reserved AS-
• AS30597 A.M. Best Company
• AS394096 Cape Regional Medical Center, Inc.
• AS26142 MANNINGTON MILLS
• AS63193 Atlanticare Health System Inc.
• AS19576 Eastern University
• AS402703 Atlantic
• AS397986 Pennsylvania Convention Center Authority
• AS14539 Vantage Labs LLC