AS33490 — COMCAST-33490 - Comcast Cable Communications, LLC

AS33490 announces 129 IPv4 prefixes covering 852,480 addresses and 61 IPv6 prefixes.

About this network

COMCAST-33490 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-76-115-64-0.hsd1.or.comcast.net and netnames like OREGON-23 and BEAVERTON-CPE-11.
• With 851712 IPv4 addresses announced across 126 prefixes and 67 observed neighbours, the high address-to-neighbour ratio indicates a large-scale access network rather than a transit provider.

Notable

• Registrants vary slightly across prefixes, including Comcast Cable Communications, Inc., Comcast Cable Communications, LLC, Comcast Cable Communications, IP Services, and Comcast Cable Communications Holdings, Inc, reflecting internal corporate restructuring and historical acquisitions.
• The inventory consists of numerous /16, /17, and /18 blocks concentrated in the Pacific Northwest, specifically Oregon and Washington, consistent with Comcast's regional cable infrastructure footprint.

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

Announced prefixes

• 23.24.240.0/20
• 24.124.129.0/24
• 50.76.96.0/20
• 50.78.176.0/20
• 50.188.176.0/20
• 50.190.32.0/19
• 50.191.128.0/19
• 50.193.208.0/20
• 50.196.0.0/19
• 50.198.160.0/20
• 50.204.255.0/24
• 50.206.113.0/24
• 50.209.32.0/19
• 50.214.64.0/20
• 50.228.52.0/24
• 50.228.76.0/24
• 50.232.199.0/24
• 50.236.220.0/24
• 50.238.126.0/23
• 50.240.16.0/20
• 50.246.224.0/19
• 50.252.0.0/19
• 50.255.96.0/20
• 67.160.128.0/18
• 67.166.80.0/20
• 67.168.192.0/18
• 67.169.192.0/19
• 67.170.128.0/18
• 67.171.128.0/17
• 67.189.0.0/17
• 68.85.146.0/24
• 68.85.148.0/22
• 68.85.242.0/23
• 68.86.8.0/24
• 68.87.69.0/24
• 68.87.216.0/22
• 69.139.155.0/24
• 69.241.17.0/24
• 69.241.58.0/23
• 69.241.76.0/24
• 69.252.64.0/24
• 69.252.228.0/23
• 69.252.236.0/23
• 70.88.170.0/23
• 70.89.176.0/20
• 70.90.128.0/21
• 70.91.184.0/22
• 70.91.222.0/24
• 71.25.144.0/20
• 71.56.128.0/19
• 71.59.128.0/17
• 71.63.128.0/17
• 71.193.128.0/17
• 71.236.128.0/17
• 71.237.128.0/17
• 71.238.0.0/17
• 72.19.22.0/24
• 74.49.229.0/24
• 74.49.241.0/24
• 74.49.245.0/24
• 74.49.247.0/24
• 74.50.14.0/23
• 74.92.160.0/20
• 74.93.184.0/21
• 74.95.32.0/20
• 75.145.64.0/20
• 75.148.48.0/21
• 75.148.80.0/20
• 75.150.32.0/20
• 76.27.192.0/18
• 76.96.2.0/23
• 76.96.40.0/23
• 76.96.45.0/24
• 76.96.94.0/23
• 76.96.112.0/23
• 76.105.128.0/17
• 76.115.0.0/16
• 76.138.128.0/17
• 76.144.0.0/16
• 96.65.192.0/19
• 96.71.160.0/19
• 96.76.96.0/19
• 96.79.96.0/19
• 96.85.128.0/20
• 96.89.96.0/19
• 96.95.128.0/19
• 96.96.208.0/21
• 96.97.232.0/21
• 96.108.64.0/23
• 96.108.80.0/24
• 96.109.9.0/24
• 96.109.10.0/23
• 96.109.12.0/22
• 96.109.156.0/23
• 96.216.60.0/24
• 96.216.100.0/23
• 96.216.124.0/23
• 96.216.158.0/23
• 96.217.40.0/22
• 96.217.96.0/22

and 90 more.

Upstream networks

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

Downstream networks

• AS393408 University of Portland
• AS13541 Siemens Industry Software Inc.
• AS31128 Apple Distribution International Ltd.
• AS15045 KITTELSON AND ASSOCIATES, INC.
• AS21718 Northwest Natural Gas
• AS40298 General Pacific, Inc.
• AS11396 Williams Information Technology LLC
• AS13888 Bear Creek Operations Inc
• AS1823 Hannah Motor Company
• AS53752 US Digital
• AS398838 Straub Collaborative, Inc.
• AS400517 Linespeed
• AS36564 Siemens Industry Software Inc.
• AS7441 Omega Datacenters, LLC
• AS36612 Clark County WA
• AS23182 THE GREENBRIER COMPANIES, INC.
• AS36040 Google LLC
• AS7406 B&R Auto
• AS25652 InRoads Federal Credit Union
• AS23431 Adventist
• AS53531 Seneca Sawmill Company
• AS399540 AbSci Corporation
• AS18661 Dunn Carney Allen Higgins & Tongue, LLP
• AS5705 Columbia Community Credit Union
• AS40227 IP Networked Services Inc.

Adjacent networks

• AS7922 Comcast Cable Communications, LLC
• AS3356 Level 3 Parent, LLC
• AS393408 University of Portland
• AS13541 Siemens Industry Software Inc.
• AS31128 Apple Distribution International Ltd.
• AS15045 KITTELSON AND ASSOCIATES, INC.
• AS21718 Northwest Natural Gas
• AS40298 General Pacific, Inc.
• AS1823 Hannah Motor Company
• AS11396 Williams Information Technology LLC
• AS13888 Bear Creek Operations Inc
• AS53752 US Digital
• AS400517 Linespeed
• AS398838 Straub Collaborative, Inc.
• AS36564 Siemens Industry Software Inc.
• AS7441 Omega Datacenters, LLC
• AS36612 Clark County WA
• AS36040 Google LLC
• AS7406 B&R Auto
• AS23182 THE GREENBRIER COMPANIES, INC.
• AS23431 Adventist
• AS25652 InRoads Federal Credit Union
• AS399540 AbSci Corporation
• AS18661 Dunn Carney Allen Higgins & Tongue, LLP
• AS53531 Seneca Sawmill Company

Routing security

• RPKI: 68 valid, 15 invalid and 14 not-found announcements; 2,306 ROAs.
• ASPA: none published.
• IRR: 61% of announcements registered; 128 route objects.
• Listed in as-sets: AS-COMCAST-IBONE, AS-COMCAST-RANS, AS-CTBC-CUSTOMERS65, AS7922:AS-COMCAST-RANS.