$ query “AS33667” --type=asn → 1 result(s)

AS33667 — CMCS

Comcast Cable Communications LLC

AS33667 is a major transit provider operated by Comcast Cable Communications LLC, based in the United States since 2005. The network announces a respectable 56 064 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): 48 / 46
IPv6 Prefixes (raw / aggregated): 63 / 59
IPv4 Addresses: 56 064
Largest IPv4 Prefix: /18 (16 384 addresses)
Largest IPv6 Prefix: /29
Geolocated Countries: 🇺🇸 US (42 IPs), 🇿🇿 ZZ (2 IPs), 🇦🇹 AT (1 IPs), 🇩🇰 DK, 🇯🇵 JP
Prefix Changed: March 04, 2026

Reputation

Reputation: Pristine — 0 flagged IPs out of 56 064 total (0.00%)

Connectivity Summary

Upstream Providers: 2 upstream autonomous systems providing transit
Peers: 0 autonomous systems exchanging traffic without transit fees
Downstream Customers: 141 downstream autonomous systems buying transit
Degree: 154 unique BGP neighbors (providers + customers + peers)
Reach: 35 042 — customer cone size measuring network influence
Degree Rank: #930
Reach Rank: #186

Upstream Providers (2)

AS3356 — LEVEL3 (Tier-1 transit)
AS7922 — COMCAST-7922

Prefix Lists

IPv4 Prefixes (48 total)

140.89.64.0/18 (16 384 addresses)
9.142.96.0/19 (8 192 addresses)
135.132.64.0/19 (8 192 addresses)
9.142.48.0/20 (4 096 addresses)
138.226.64.0/20 (4 096 addresses)
138.226.48.0/21 (2 048 addresses)
138.226.112.0/21 (2 048 addresses)
5.182.194.0/23 (512 addresses)
107.0.64.0/23 (512 addresses)
161.82.44.0/23 (512 addresses)
169.230.76.0/23 (512 addresses)
5.182.186.0/24 (256 addresses)
5.182.193.0/24 (256 addresses)
36.255.215.0/24 (256 addresses)
45.67.141.0/24 (256 addresses)
50.203.5.0/24 (256 addresses)
50.203.201.0/24 (256 addresses)
50.207.246.0/24 (256 addresses)
50.222.62.0/24 (256 addresses)
50.236.209.0/24 (256 addresses)
50.239.185.0/24 (256 addresses)
63.246.129.0/24 (256 addresses)
63.246.148.0/24 (256 addresses)
63.246.152.0/24 (256 addresses)
63.246.159.0/24 (256 addresses)
64.189.18.0/24 (256 addresses)
78.31.206.0/24 (256 addresses)
103.111.63.0/24 (256 addresses)
103.216.197.0/24 (256 addresses)
139.181.7.0/24 (256 addresses)
139.181.26.0/24 (256 addresses)
149.126.13.0/24 (256 addresses)
157.240.151.0/24 (256 addresses)
157.240.152.0/24 (256 addresses)
161.82.0.0/24 (256 addresses)
161.82.12.0/24 (256 addresses)
162.218.89.0/24 (256 addresses)
185.22.43.0/24 (256 addresses)
185.201.41.0/24 (256 addresses)
185.201.43.0/24 (256 addresses)
192.70.238.0/24 (256 addresses)
192.189.161.0/24 (256 addresses)
192.206.19.0/24 (256 addresses)
198.202.219.0/24 (256 addresses)
204.145.245.0/24 (256 addresses)
209.78.88.0/24 (256 addresses)

IPv6 Prefixes (63 total)

2a0c:1900::/29
2620:10a:6000::/44
2001:559:8b::/48
2001:559:8c::/48
2001:559:123::/48
2001:559:13c::/48
2001:559:1b1::/48
2001:559:249::/48
2001:559:2bf::/48
2001:559:2c1::/48
2001:559:32d::/48
2001:559:373::/48
2001:559:47c::/48
2001:559:492::/48
2001:559:4c6::/48
2001:559:5a2::/48
2001:559:5de::/48
2001:559:712::/48
2001:559:75a::/48
2001:559:7cb::/48
2001:559:8091::/48
2001:559:80a8::/48
2001:559:8167::/48
2001:559:8202::/48
2001:559:82f6::/48
2001:559:83e1::/48
2001:559:8439::/48
2001:559:845d::/48
2001:559:8492::/48
2001:559:859a::/48
2001:559:85d8::/48
2001:559:860f::/48
2001:559:8610::/48
2001:559:86a7::/48
2001:559:86ec::/48
2001:559:8763::/48
2001:559:8784::/48
2001:559:87c8::/48
2001:559:c024::/48
2001:559:c082::/48
2001:559:c107::/48
2001:559:c117::/48
2001:559:c144::/48
2001:559:c203::/48
2001:559:c219::/48
2001:559:c222::/48
2001:559:c294::/48
2001:559:c36d::/48
2001:559:c37b::/48
2001:559:c395::/48