$ query “AS33657” --type=asn → 1 result(s)
AS33657 — CMCS
Comcast Cable Communications LLC
AS33657 is a major transit provider registered to Comcast Cable Communications LLC, based in the United States since 2005. The network announces a respectable 11 776 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)
- 30 / 29
- IPv6 Prefixes (raw / aggregated)
- 248 / 229
- IPv4 Addresses
- 11 776
- Largest IPv4 Prefix
- /20 (4 096 addresses)
- Largest IPv6 Prefix
- /47
- Geolocated Countries
- 🇺🇸 US (30 IPs)
- Prefix Changed
- March 04, 2026
Reputation
- Reputation
- Pristine — 0 flagged IPs out of 11 776 total (0.00%)
Connectivity Summary
- Upstream Providers
- 2 upstream autonomous systems providing transit
- Peers
- 0 autonomous systems exchanging traffic without transit fees
- Downstream Customers
- 125 downstream autonomous systems buying transit
- Degree
- 139 unique BGP neighbors (providers + customers + peers)
- Reach
- 139 — customer cone size measuring network influence
- Degree Rank
- #1 058
- Reach Rank
- #930
Upstream Providers (2)
Prefix Lists
IPv4 Prefixes (30 total)
- 69.67.80.0/20 (4 096 addresses)
- 50.223.158.0/23 (512 addresses)
- 192.110.220.0/23 (512 addresses)
- 50.201.252.0/24 (256 addresses)
- 50.202.117.0/24 (256 addresses)
- 50.202.155.0/24 (256 addresses)
- 50.203.251.0/24 (256 addresses)
- 50.204.116.0/24 (256 addresses)
- 50.204.128.0/24 (256 addresses)
- 50.205.74.0/24 (256 addresses)
- 50.207.162.0/24 (256 addresses)
- 50.216.214.0/24 (256 addresses)
- 50.219.87.0/24 (256 addresses)
- 50.224.212.0/24 (256 addresses)
- 50.232.109.0/24 (256 addresses)
- 50.232.173.0/24 (256 addresses)
- 50.232.184.0/24 (256 addresses)
- 50.235.98.0/24 (256 addresses)
- 50.235.236.0/24 (256 addresses)
- 50.236.38.0/24 (256 addresses)
- 50.236.234.0/24 (256 addresses)
- 50.238.112.0/24 (256 addresses)
- 50.238.163.0/24 (256 addresses)
- 50.239.232.0/24 (256 addresses)
- 76.78.2.0/24 (256 addresses)
- 107.1.101.0/24 (256 addresses)
- 192.189.235.0/24 (256 addresses)
- 199.249.199.0/24 (256 addresses)
- 208.87.105.0/24 (256 addresses)
IPv6 Prefixes (248 total)
- 2001:559:25a::/47
- 2001:559:2ca::/47
- 2001:559:488::/47
- 2001:559:8040::/47
- 2001:559:80b0::/47
- 2001:559:80fc::/47
- 2001:559:8140::/47
- 2001:559:816a::/47
- 2001:559:8212::/47
- 2001:559:8262::/47
- 2001:559:857e::/47
- 2001:559:8582::/47
- 2001:559:865a::/47
- 2001:559:8666::/47
- 2001:559:c0c2::/47
- 2001:559:c140::/47
- 2001:559:c2b0::/47
- 2001:559:c3f2::/47
- 2001:559:c42a::/47
- 2001:559:b::/48
- 2001:559:48::/48
- 2001:559:7a::/48
- 2001:559:87::/48
- 2001:559:a2::/48
- 2001:559:ae::/48
- 2001:559:db::/48
- 2001:559:110::/48
- 2001:559:136::/48
- 2001:559:16a::/48
- 2001:559:202::/48
- 2001:559:214::/48
- 2001:559:246::/48
- 2001:559:282::/48
- 2001:559:284::/48
- 2001:559:288::/48
- 2001:559:2b6::/48
- 2001:559:2f3::/48
- 2001:559:304::/48
- 2001:559:30d::/48
- 2001:559:319::/48
- 2001:559:377::/48
- 2001:559:3ba::/48
- 2001:559:3ca::/48
- 2001:559:3d2::/48
- 2001:559:3dc::/48
- 2001:559:3eb::/48
- 2001:559:3f1::/48
- 2001:559:42c::/48
- 2001:559:43a::/48
- 2001:559:45a::/48