Country
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ASN LANDING PAGE
AS33651
CMCS - Comcast Cable Communications, LLC
Last updated · Apr 10, 2026
Total prefixes
281
IPv4 prefixes
84
IPv6 prefixes
197
ASN summary
How to read the scale of AS33651
CMCS - Comcast Cable Communications, LLC currently shows 281 prefixes and 42 upstream, downstream, or peer relationships. Larger prefix inventories often indicate broader network footprint, but they should still be read together with country and peering context.
When is an ASN page most useful?
ASN landing pages are more useful than a single IP page when you want cloud provider attribution, routing research, infrastructure comparison, or network topology analysis at the organization level.
How should you read the country, organization, and role of AS33651?
CMCS - Comcast Cable Communications, LLC is currently associated with an unknown region. Country data is only a starting point; the more important signals are the organization name, website, prefix volume, and peering relationships that reveal whether the network behaves like a cloud platform, ISP, CDN, or enterprise backbone.
What should you inspect next after the AS33651 page?
This page is currently showing live ASN data that can be used for peer, prefix, and network scale analysis. The most useful next step is usually to return to a related IP landing page, then compare that concrete address with this ASN profile and with broader topic pages for routing, cloud attribution, or WHOIS ownership analysis.
Search intents this ASN page helps cover
AS33651 ASN lookupAS33651 BGPAS33651 peersAS33651 prefixesAS33651 upstreamsCMCS - Comcast Cable Communications, LLC ASN
Upstreams
Detailed data for this ASN is not available right now.
Downstreams
AS1226
AS1226
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AS55064
AS55064
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AS6099
AS6099
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AS32537
AS32537
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AS395011
AS395011
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AS20066
AS20066
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AS395976
AS395976
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AS10309
AS10309
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AS36040
AS36040
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AS63435
AS63435
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AS23472
AS23472
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AS17117
AS17117
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AS46864
AS46864
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AS53985
AS53985
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AS36776
AS36776
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AS46305
AS46305
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AS393305
AS393305
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AS395132
AS395132
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AS397030
AS397030
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AS14388
AS14388
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AS22369
AS22369
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AS36361
AS36361
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AS40039
AS40039
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AS26758
AS26758
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AS17035
AS17035
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AS26325
AS26325
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AS32504
AS32504
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AS5081
AS5081
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AS19126
AS19126
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AS23154
AS23154
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AS29878
AS29878
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AS397258
AS397258
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AS18880
AS18880
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AS33161
AS33161
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AS53497
AS53497
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AS54201
AS54201
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AS62508
AS62508
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AS5098
AS5098
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AS11328
AS11328
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AS14706
AS14706
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Peers
Prefix inventory
| Prefix | Name | Country |
|---|---|---|
| 103.111.63.0/24 | AS33651 | — |
| 103.216.197.0/24 | AS33651 | — |
| 107.0.21.0/24 | AS33651 | — |
| 135.132.64.0/19 | AS33651 | — |
| 138.226.112.0/21 | AS33651 | — |
| 138.226.192.0/21 | AS33651 | — |
| 138.226.192.0/22 | AS33651 | — |
| 138.226.196.0/22 | AS33651 | — |
| 138.226.48.0/21 | AS33651 | — |
| 138.226.64.0/20 | AS33651 | — |
| 139.181.26.0/24 | AS33651 | — |
| 139.181.7.0/24 | AS33651 | — |
| 140.89.64.0/18 | AS33651 | — |
| 162.218.89.0/24 | AS33651 | — |
| 169.230.76.0/24 | AS33651 | — |
| 169.230.77.0/24 | AS33651 | — |
| 185.201.41.0/24 | AS33651 | — |
| 185.201.43.0/24 | AS33651 | — |
| 185.22.43.0/24 | AS33651 | — |
| 192.189.161.0/24 | AS33651 | — |
| 192.206.19.0/24 | AS33651 | — |
| 192.70.238.0/24 | AS33651 | — |
| 198.145.106.0/24 | AS33651 | — |
| 198.202.219.0/24 | AS33651 | — |
| 2001:559:104::/48 | AS33651 | — |
| 2001:559:106::/48 | AS33651 | — |
| 2001:559:17e::/48 | AS33651 | — |
| 2001:559:197::/48 | AS33651 | — |
| 2001:559:1c0::/48 | AS33651 | — |
| 2001:559:1c1::/48 | AS33651 | — |
| 2001:559:1ed::/48 | AS33651 | — |
| 2001:559:20e::/48 | AS33651 | — |
| 2001:559:218::/48 | AS33651 | — |
| 2001:559:21a::/48 | AS33651 | — |
| 2001:559:24f::/48 | AS33651 | — |
| 2001:559:259::/48 | AS33651 | — |
| 2001:559:262::/48 | AS33651 | — |
| 2001:559:295::/48 | AS33651 | — |
| 2001:559:2ac::/48 | AS33651 | — |
| 2001:559:2dd::/48 | AS33651 | — |
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Related lookups and next steps
WHOIS vs ASN Ownership Guide
Continue from this ASN into the differences between WHOIS ownership and ASN ownership.
Routing Troubleshooting and Network Analysis
Continue from this ASN into route troubleshooting and network analysis.
Cloud Network and ASN Comparison
Useful when you want to compare this ASN against larger cloud and edge networks.
WHOIS and IP Ownership Guide
Continue from the ASN page into WHOIS and ownership verification.
Frequently asked questions about this ASN page
What does AS33651 represent?
AS33651 is an autonomous system number used to identify an independently operated network. The current page associates it with CMCS - Comcast Cable Communications, LLC in an unknown region, which helps determine whether it behaves like a cloud provider, ISP, CDN, or enterprise backbone.
What are peers, upstreams, and prefixes useful for on the AS33651 page?
They help explain the scale, interconnection depth, and route structure of AS33651. Richer peering and upstream data often indicate broader network reach, but they should still be interpreted together with prefixes and related IP landing pages.
What should you do after reviewing AS33651?
The best next step is usually to return to a concrete IP landing page to see how a specific address maps into AS33651, then continue into cloud, WHOIS, or routing topic pages to understand the network in a broader context.
Related topics
WHOIS vs ASN Ownership Guide
Understand why WHOIS ownership and ASN ownership can differ, and how to combine both when deciding who really owns or operates an IP.
WHOIS and IP Ownership Guide
Use WHOIS, ASN, prefixes, and organization data to determine who ultimately owns an IP, range, or resolved domain target.
BGP and ASN Basics Guide
Learn what ASN, BGP routes, prefixes, upstreams, downstreams, and peers mean, then explore real ASN pages.
Cloud Network and ASN Comparison
Compare large cloud and edge networks such as Google, Cloudflare, Microsoft, and Amazon through their ASN landing pages.