$ query “AS33491” --type=asn → 1 result(s)
AS33491 · COMCAST-33491
Comcast Cable Communications LLC
AS33491 is operated by Comcast Cable Communications LLC and serves as a major transit provider, established in the United States in 2004. The system announces a respectable 49 664 IPv4 addresses, and supports IPv6. Its primary geographic footprint is in the United States, with additional presence in Australia. This AS has recently updated its prefix announcements.
- 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
- December 30, 2004
- Last Changed
- March 04, 2026
- Last Seen
- April 28, 2026 (active)
Prefix Summary
- IPv4 Prefixes (raw / aggregated)
- 91 / 86
- IPv6 Prefixes (raw / aggregated)
- 212 / 190
- IPv4 Addresses
- 49 664
- Largest IPv4 Prefix
- /18 (16 384 addresses)
- Largest IPv6 Prefix
- /46
- Geolocated Countries
- 🇺🇸 United States (41 472 IPs), 🇦🇺 Australia (8 448 IPs)
- Prefix Changed
- April 24, 2026
Reputation
- Reputation
- Pristine — 0 flagged IPs
Connectivity Summary
- Upstream Providers
- 3 upstreams providing transit
- Downstream Customers
- 251 downstreams buying transit
- Unclassified
- 5 unclassified BGP neighbors
- Degree
- 259 unique BGP neighbors
- Reach
- 289 networks in customer cone
Upstream Providers (3)
Prefix Lists
IPv4 Prefixes (91 total)
- 209.153.0.0/18 (16 384 addresses (/18 prefix))
- 164.68.64.0/19 (8 192 addresses (/19 prefix))
- 50.220.4.0/22 (1 024 addresses (/22 prefix))
- 50.229.76.0/22 (1 024 addresses (/22 prefix))
- 50.205.54.0/23 (512 addresses (/23 prefix))
- 50.220.130.0/23 (512 addresses (/23 prefix))
- 50.224.140.0/23 (512 addresses (/23 prefix))
- 205.167.202.0/23 (512 addresses (/23 prefix))
- 199.5.60.0/23 (512 addresses (/23 prefix))
- 107.1.102.0/23 (512 addresses (/23 prefix))
- 107.0.182.0/23 (512 addresses (/23 prefix))
- 107.0.96.0/23 (512 addresses (/23 prefix))
- 50.232.176.0/24 (256 addresses (/24 prefix))
- 50.237.12.0/24 (256 addresses (/24 prefix))
- 50.204.189.0/24 (256 addresses (/24 prefix))
- 50.205.166.0/24 (256 addresses (/24 prefix))
- 50.206.250.0/24 (256 addresses (/24 prefix))
- 50.207.233.0/24 (256 addresses (/24 prefix))
- 50.216.36.0/24 (256 addresses (/24 prefix))
- 50.216.227.0/24 (256 addresses (/24 prefix))
- 50.217.237.0/24 (256 addresses (/24 prefix))
- 50.218.78.0/24 (256 addresses (/24 prefix))
- 50.219.59.0/24 (256 addresses (/24 prefix))
- 50.219.60.0/24 (256 addresses (/24 prefix))
- 50.220.44.0/24 (256 addresses (/24 prefix))
- 50.220.116.0/24 (256 addresses (/24 prefix))
- 50.220.188.0/24 (256 addresses (/24 prefix))
- 50.224.45.0/24 (256 addresses (/24 prefix))
- 50.224.194.0/24 (256 addresses (/24 prefix))
- 50.225.88.0/24 (256 addresses (/24 prefix))
- 50.227.239.0/24 (256 addresses (/24 prefix))
- 50.228.97.0/24 (256 addresses (/24 prefix))
- 50.230.91.0/24 (256 addresses (/24 prefix))
- 50.230.112.0/24 (256 addresses (/24 prefix))
- 50.231.36.0/24 (256 addresses (/24 prefix))
- 50.231.52.0/24 (256 addresses (/24 prefix))
- 50.231.119.0/24 (256 addresses (/24 prefix))
- 50.231.218.0/24 (256 addresses (/24 prefix))
- 50.231.221.0/24 (256 addresses (/24 prefix))
- 50.232.93.0/24 (256 addresses (/24 prefix))
- 50.232.95.0/24 (256 addresses (/24 prefix))
- 50.232.142.0/24 (256 addresses (/24 prefix))
- 50.204.23.0/24 (256 addresses (/24 prefix))
- 50.232.195.0/24 (256 addresses (/24 prefix))
- 50.233.216.0/24 (256 addresses (/24 prefix))
- 50.233.247.0/24 (256 addresses (/24 prefix))
- 50.234.21.0/24 (256 addresses (/24 prefix))
- 50.234.141.0/24 (256 addresses (/24 prefix))
- 50.235.155.0/24 (256 addresses (/24 prefix))
- 50.204.91.0/24 (256 addresses (/24 prefix))
- and 36 more
IPv6 Prefixes (212 total)
- 2001:559:c19c::/46
- 2001:559:228::/46
- 2001:559:224::/47
- 2001:559:c028::/47
- 2001:559:22e::/47
- 2001:559:c4e4::/47
- 2001:559:c28c::/47
- 2001:559:b0::/47
- 2001:559:c080::/47
- 2001:559:222::/47
- 2001:559:8648::/47
- 2001:559:85b6::/47
- 2001:559:7e::/47
- 2001:559:8050::/47
- 2001:559:766::/47
- 2001:559:4fa::/47
- 2001:559:308::/47
- 2001:559:230::/47
- 2001:559:81e7::/48
- 2001:559:87bc::/48
- 2001:559:1e5::/48
- 2001:559:1fc::/48
- 2001:559:1ff::/48
- 2001:559:204::/48
- 2001:559:221::/48
- 2001:559:226::/48
- 2001:559:22d::/48
- 2001:559:1d6::/48
- 2001:559:15d::/48
- 2001:559:24b::/48
- 2001:559:24c::/48
- 2001:559:27b::/48
- 2001:559:2a5::/48
- 2001:559:2d1::/48
- 2001:559:2e3::/48
- 2001:559:303::/48
- 2001:559:148::/48
- 2001:559:311::/48
- 2001:559:314::/48
- 2001:559:32f::/48
- 2001:559:346::/48
- 2001:559:348::/48
- 2001:559:34a::/48
- 2001:559:39e::/48
- 2001:559:3c2::/48
- 2001:559:3c9::/48
- 2001:559:3cb::/48
- 2001:559:3ee::/48
- 2001:559:3fa::/48
- 2001:559:408::/48
- and 140 more