Country
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ASN LANDING PAGE
AS33660
CMCS - Comcast Cable Communications, LLC
Last updated · Apr 10, 2026
Total prefixes
64
IPv4 prefixes
10
IPv6 prefixes
54
ASN summary
How to read the scale of AS33660
CMCS - Comcast Cable Communications, LLC currently shows 64 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 AS33660?
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 AS33660 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
AS33660 ASN lookupAS33660 BGPAS33660 peersAS33660 prefixesAS33660 upstreamsCMCS - Comcast Cable Communications, LLC ASN
Upstreams
Detailed data for this ASN is not available right now.
Downstreams
AS33741
AS33741
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AS16785
AS16785
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AS23389
AS23389
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AS11052
AS11052
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AS27178
AS27178
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AS54308
AS54308
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AS11396
AS11396
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AS40644
AS40644
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AS55251
AS55251
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AS393459
AS393459
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AS394185
AS394185
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AS10786
AS10786
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AS397612
AS397612
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AS399421
AS399421
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AS393541
AS393541
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AS19648
AS19648
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AS23154
AS23154
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AS394662
AS394662
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AS399965
AS399965
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AS29298
AS29298
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AS19477
AS19477
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AS33173
AS33173
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AS400284
AS400284
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AS54629
AS54629
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AS17206
AS17206
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AS32602
AS32602
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AS14149
AS14149
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AS393940
AS393940
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AS395994
AS395994
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AS17150
AS17150
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AS53882
AS53882
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AS393917
AS393917
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AS400988
AS400988
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AS63169
AS63169
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AS13335
AS13335
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AS27625
AS27625
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AS11791
AS11791
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AS13610
AS13610
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AS29864
AS29864
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AS55018
AS55018
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Peers
Prefix inventory
| Prefix | Name | Country |
|---|---|---|
| 129.134.166.0/24 | AS33660 | — |
| 129.134.167.0/24 | AS33660 | — |
| 192.16.177.0/24 | AS33660 | — |
| 2001:559:20a::/48 | AS33660 | — |
| 2001:559:26c::/48 | AS33660 | — |
| 2001:559:29::/48 | AS33660 | — |
| 2001:559:2de::/48 | AS33660 | — |
| 2001:559:2e4::/48 | AS33660 | — |
| 2001:559:31a::/48 | AS33660 | — |
| 2001:559:37f::/48 | AS33660 | — |
| 2001:559:3b2::/48 | AS33660 | — |
| 2001:559:3b3::/48 | AS33660 | — |
| 2001:559:3c4::/48 | AS33660 | — |
| 2001:559:41a::/48 | AS33660 | — |
| 2001:559:4a7::/48 | AS33660 | — |
| 2001:559:4a9::/48 | AS33660 | — |
| 2001:559:521::/48 | AS33660 | — |
| 2001:559:57f::/48 | AS33660 | — |
| 2001:559:58c::/48 | AS33660 | — |
| 2001:559:5d8::/48 | AS33660 | — |
| 2001:559:808a::/48 | AS33660 | — |
| 2001:559:8092::/48 | AS33660 | — |
| 2001:559:8137::/48 | AS33660 | — |
| 2001:559:8193::/48 | AS33660 | — |
| 2001:559:821b::/48 | AS33660 | — |
| 2001:559:8282::/48 | AS33660 | — |
| 2001:559:82d4::/48 | AS33660 | — |
| 2001:559:82e8::/48 | AS33660 | — |
| 2001:559:82fe::/48 | AS33660 | — |
| 2001:559:831b::/48 | AS33660 | — |
| 2001:559:8329::/48 | AS33660 | — |
| 2001:559:83a6::/48 | AS33660 | — |
| 2001:559:8443::/48 | AS33660 | — |
| 2001:559:8450::/48 | AS33660 | — |
| 2001:559:8460::/48 | AS33660 | — |
| 2001:559:8484::/48 | AS33660 | — |
| 2001:559:8485::/48 | AS33660 | — |
| 2001:559:84a0::/48 | AS33660 | — |
| 2001:559:85e0::/48 | AS33660 | — |
| 2001:559:86b6::/48 | AS33660 | — |
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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 AS33660 represent?
AS33660 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 AS33660 page?
They help explain the scale, interconnection depth, and route structure of AS33660. 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 AS33660?
The best next step is usually to return to a concrete IP landing page to see how a specific address maps into AS33660, 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.