$ query “AS33660” --type=asn → 1 result(s)
AS33660 — CMCS
Comcast Cable Communications LLC
AS33660 is a major transit provider run by Comcast Cable Communications LLC, established in the United States in 2005. The network announces 2 560 IPv4 addresses. Supports IPv6.
- Top 5% — Top 5% of all autonomous systems by reach and degree
Basic Information
- Country
- 🇺🇸 United States
- Category
- Internet Service Provider
- Network Role
- Major Transit
- Data Origin
- Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
- Registered
- February 16, 2005
- Last Changed
- March 04, 2026
- Last Seen
- March 04, 2026
Prefix Summary
- IPv4 Prefixes (raw / aggregated)
- 10 / 9
- IPv6 Prefixes (raw / aggregated)
- 56 / 52
- IPv4 Addresses
- 2 560
- Largest IPv4 Prefix
- /23 (512 addresses)
- Largest IPv6 Prefix
- /47
- Geolocated Countries
- 🇺🇸 US (9 IPs)
- Prefix Changed
- March 04, 2026
Reputation
- Reputation
- Pristine — 0 flagged IPs out of 2 560 total (0.00%)
Connectivity Summary
- Upstream Providers
- 2 upstream autonomous systems providing transit
- Peers
- 0 autonomous systems exchanging traffic without transit fees
- Downstream Customers
- 63 downstream autonomous systems buying transit
- Degree
- 66 unique BGP neighbors (providers + customers + peers)
- Reach
- 34 982 — customer cone size measuring network influence
- Degree Rank
- #2 463
- Reach Rank
- #226
Upstream Providers (2)
Prefix Lists
IPv4 Prefixes (10 total)
- 129.134.166.0/23 (512 addresses)
- 50.204.89.0/24 (256 addresses)
- 50.207.68.0/24 (256 addresses)
- 50.217.32.0/24 (256 addresses)
- 50.222.146.0/24 (256 addresses)
- 50.222.157.0/24 (256 addresses)
- 50.224.25.0/24 (256 addresses)
- 50.237.123.0/24 (256 addresses)
- 192.16.177.0/24 (256 addresses)
IPv6 Prefixes (56 total)
- 2001:559:fa::/47
- 2001:559:3b2::/47
- 2001:559:8484::/47
- 2a03:2887:ff46::/47
- 2001:559:29::/48
- 2001:559:20a::/48
- 2001:559:26c::/48
- 2001:559:2de::/48
- 2001:559:2e4::/48
- 2001:559:31a::/48
- 2001:559:37f::/48
- 2001:559:3c4::/48
- 2001:559:41a::/48
- 2001:559:4a7::/48
- 2001:559:4a9::/48
- 2001:559:521::/48
- 2001:559:57f::/48
- 2001:559:58c::/48
- 2001:559:5d8::/48
- 2001:559:808a::/48
- 2001:559:8092::/48
- 2001:559:8137::/48
- 2001:559:8193::/48
- 2001:559:819d::/48
- 2001:559:821b::/48
- 2001:559:8282::/48
- 2001:559:82d4::/48
- 2001:559:82e8::/48
- 2001:559:82fe::/48
- 2001:559:831b::/48
- 2001:559:8329::/48
- 2001:559:83a6::/48
- 2001:559:8443::/48
- 2001:559:8450::/48
- 2001:559:8460::/48
- 2001:559:84a0::/48
- 2001:559:85e0::/48
- 2001:559:86b6::/48
- 2001:559:8782::/48
- 2001:559:c0ef::/48
- 2001:559:c154::/48
- 2001:559:c16d::/48
- 2001:559:c171::/48
- 2001:559:c173::/48
- 2001:559:c1ef::/48
- 2001:559:c285::/48
- 2001:559:c28a::/48
- 2001:559:c2e6::/48
- 2001:559:c348::/48
- 2001:559:c3f5::/48