AS21508
Comcast Cable Communications, LLC ISP registered in United States
18IPv4 prefixes
61IPv6 prefixes
91%RPKI-valid
#850AS Rank
326/326RIS visibility
#439Rank in United States
2001-05-16Allocated
Comcast Cable Communications, LLC (AS21508) — ISP, registered in United States. announces 18 IPv4 prefixes + 61 IPv6 prefixes. Rank in United States: #439. Allocated: 2001-05-16.
IPv4 18IPv6 61
Announced prefixes · 79
- v4 141.104.0.0/16 unknown
- v4 157.240.147.0/24 unknown
- v4 157.240.148.0/24 unknown
- v4 173.242.174.0/24 unknown
- v4 198.90.112.0/22 unknown
- v4 204.194.47.0/24 unknown
- v4 205.223.19.0/24 unknown
- v4 50.204.101.0/24 valid
- v4 50.205.217.0/24 valid
- v4 50.216.229.0/24 valid
- v4 50.217.1.0/24 valid
- v4 50.217.207.0/24 valid
- v4 50.218.47.0/24 valid
- v4 50.219.12.0/22 valid
- v4 50.228.113.0/24 valid
- v4 50.229.113.0/24 valid
- v4 50.229.114.0/24 valid
- v4 50.235.34.0/24 valid
- v6 2001:559:220::/48 valid
- v6 2001:559:243::/48 valid
- v6 2001:559:280::/48 valid
- v6 2001:559:37d::/48 valid
- v6 2001:559:3ac::/48 valid
- v6 2001:559:3b9::/48 valid
- v6 2001:559:3c8::/48 valid
- v6 2001:559:40a::/48 valid
- v6 2001:559:49a::/48 valid
- v6 2001:559:49b::/48 valid
- v6 2001:559:53c::/48 valid
- v6 2001:559:5c9::/48 valid
- v6 2001:559:5db::/48 valid
- v6 2001:559:72b::/48 valid
- v6 2001:559:73c::/48 valid
- v6 2001:559:788::/48 valid
- v6 2001:559:78a::/48 valid
- v6 2001:559:79d::/48 valid
- v6 2001:559:79e::/48 valid
- v6 2001:559:7a7::/48 valid
- v6 2001:559:7db::/48 valid
- v6 2001:559:804c::/48 valid
- v6 2001:559:81bf::/48 valid
- v6 2001:559:81d7::/48 valid
- v6 2001:559:81d8::/48 valid
- v6 2001:559:8201::/48 valid
- v6 2001:559:82fd::/48 valid
- v6 2001:559:833e::/48 valid
- v6 2001:559:8416::/48 valid
- v6 2001:559:841c::/48 valid
- v6 2001:559:8445::/48 valid
- v6 2001:559:8535::/48 valid
RPKI: rpki.cloudflare.com · 2026-06-17
Routing: 18 IPv4 · 61 IPv6 announced · RIS visibility 326/326 RIS peers · RIPEstat · 2026-06-17
Prefix history
Data table
| Day | Announced prefixes |
|---|---|
| 2026-06-12 | 79 |
| 2026-06-13 | 79 |
Facilities · 1
- EdgeConneX Richmond (EDCRIC01) Richmond
AS topology · Customer cone 47
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