AS33662 — CMCS - Comcast Cable Communications, LLC

AS33662 announces 15 IPv4 prefixes covering 3,840 addresses and 95 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 and commercial cable internet services, evidenced by netnames such as CCCH3-4 and COMAST-PRIV-CUSTOMER.
• With 3,840 IPv4 addresses and 98 IPv6 prefixes announced against 58 observed neighbours, the ratio indicates a regional access network rather than a transit provider.

Notable

• Registrants are predominantly Comcast Cable Communications, LLC, with one prefix registered to the City of Missouri City.
• The inventory consists of 15 IPv4 prefixes, mostly /24 blocks, alongside a larger set of IPv6 /48 prefixes.
• The network has been observed in routing tables since 2007.

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

Announced prefixes

• 24.104.75.0/24
• 50.201.112.0/24
• 50.217.18.0/24
• 50.220.66.0/24
• 50.228.10.0/24
• 50.228.194.0/24
• 50.231.217.0/24
• 50.232.18.0/24
• 50.232.206.0/24
• 50.234.8.0/24
• 50.235.195.0/24
• 50.235.196.0/24
• 64.189.25.0/24
• 198.46.65.0/24
• 208.110.207.0/24
• 2001:559:42::/48
• 2001:559:153::/48
• 2001:559:154::/48
• 2001:559:182::/48
• 2001:559:18c::/48
• 2001:559:1b3::/48
• 2001:559:1f2::/48
• 2001:559:256::/48
• 2001:559:265::/48
• 2001:559:287::/48
• 2001:559:334::/48
• 2001:559:351::/48
• 2001:559:38d::/48
• 2001:559:392::/48
• 2001:559:397::/48
• 2001:559:398::/48
• 2001:559:3e3::/48
• 2001:559:3e4::/48
• 2001:559:3ed::/48
• 2001:559:4b7::/48
• 2001:559:4fe::/48
• 2001:559:5ab::/48
• 2001:559:728::/48
• 2001:559:8012::/48
• 2001:559:804d::/48
• 2001:559:8156::/48
• 2001:559:8168::/48
• 2001:559:8172::/48
• 2001:559:81c9::/48
• 2001:559:81f4::/48
• 2001:559:8311::/48
• 2001:559:83c1::/48
• 2001:559:83de::/48
• 2001:559:83fa::/48
• 2001:559:8424::/48
• 2001:559:8472::/48
• 2001:559:84b7::/48
• 2001:559:852d::/48
• 2001:559:852e::/47
• 2001:559:8544::/48
• 2001:559:857b::/48
• 2001:559:85ac::/48
• 2001:559:85ce::/47
• 2001:559:85d0::/48
• 2001:559:85d7::/48
• 2001:559:85d9::/48
• 2001:559:85e9::/48
• 2001:559:85ed::/48
• 2001:559:85f8::/48
• 2001:559:8603::/48
• 2001:559:863f::/48
• 2001:559:866f::/48
• 2001:559:86ae::/48
• 2001:559:86d6::/47
• 2001:559:86d8::/48
• 2001:559:8739::/48
• 2001:559:8748::/48
• 2001:559:8771::/48
• 2001:559:8772::/48
• 2001:559:8783::/48
• 2001:559:87d0::/48
• 2001:559:c020::/47
• 2001:559:c0e8::/48
• 2001:559:c157::/48
• 2001:559:c181::/48
• 2001:559:c1a6::/48
• 2001:559:c1fc::/48
• 2001:559:c1fe::/47
• 2001:559:c200::/48
• 2001:559:c20f::/48
• 2001:559:c223::/48
• 2001:559:c23f::/48
• 2001:559:c243::/48
• 2001:559:c254::/48
• 2001:559:c256::/47
• 2001:559:c26f::/48
• 2001:559:c289::/48
• 2001:559:c2d0::/48
• 2001:559:c374::/48
• 2001:559:c37e::/47
• 2001:559:c3ae::/48
• 2001:559:c404::/48
• 2001:559:c410::/48
• 2001:559:c417::/48
• 2001:559:c424::/48

and 10 more.

Upstream networks

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

Downstream networks

• AS36538 San Jacinto College District
• AS31128 Apple Distribution International Ltd.
• AS46209 GHC911
• AS4057 Mechant's Choice Payment Solutions
• AS20204 NovoLink Communications, Inc. - Houston
• AS19195 MEGLOBAL AMERICAS INC.
• AS14296 Spring Fire Department
• AS2386 AT&T Enterprises, LLC
• AS63483 Skynet
• AS16746 CenterPoint Energy, Inc.
• AS395238 Brazosport Independent School District
• AS2134 Santander Global Technology and Operations, S.L.
• AS27206 City of Sugar Land
• AS402398 cpap.com
• AS36567 Hearst-Argyle Television, Inc.
• AS397288 McNaughton-McKay Electric Company
• AS36410 Vizient, Inc.
• AS53571 PRECISION CASTPARTS CORP
• AS36026 CommonSpirit Health
• AS394977 TAKE-TWO INTERACTIVE SOFTWARE, INC.
• AS29703 Deer Park Refining Limited Partnership
• AS396272 Houston Texans
• AS16903 Texas Southern University
• AS17035 NBCUniversal
• AS54063 Memorial Hermann Health System

Adjacent networks

• AS7922 Comcast Cable Communications, LLC
• AS3356 Level 3 Parent, LLC
• AS36538 San Jacinto College District
• AS31128 Apple Distribution International Ltd.
• AS46209 GHC911
• AS4057 Mechant's Choice Payment Solutions
• AS20204 NovoLink Communications, Inc. - Houston
• AS19195 MEGLOBAL AMERICAS INC.
• AS14296 Spring Fire Department
• AS2386 AT&T Enterprises, LLC
• AS63483 Skynet
• AS16746 CenterPoint Energy, Inc.
• AS395238 Brazosport Independent School District
• AS2134 Santander Global Technology and Operations, S.L.
• AS27206 City of Sugar Land
• AS402398 cpap.com
• AS36567 Hearst-Argyle Television, Inc.
• AS397288 McNaughton-McKay Electric Company
• AS36410 Vizient, Inc.
• AS36026 CommonSpirit Health
• AS53571 PRECISION CASTPARTS CORP
• AS394977 TAKE-TWO INTERACTIVE SOFTWARE, INC.
• AS29703 Deer Park Refining Limited Partnership
• AS396272 Houston Texans
• AS16903 Texas Southern University

Routing security

• RPKI: 116 valid, 0 invalid and 2 not-found announcements; 3,440 ROAs.
• ASPA: none published.
• IRR: 2% of announcements registered; 18 route objects.
• Listed in as-sets: AS-COMCAST-IBONE, AS-COMCAST-RANS, AS-CTBC-CUSTOMERS65, AS-TMNET-CUSTOMERS, AS14296:AS-PEERS, AS7922:AS-COMCAST-RANS.