AS21508
Comcast Cable Communications, LLC ISP registered in United States
18IPv4 prefixes
61IPv6 prefixes
91%RPKI-valid
#850AS Rank
326/326RIS visibility
#438Rank 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: #438. Allocated: 2001-05-16.
IPv4 18IPv6 61
Announced prefixes · 79
- v6 2001:559:85c1::/48 valid
- v6 2001:559:85ff::/48 valid
- v6 2001:559:8604::/48 valid
- v6 2001:559:871a::/48 valid
- v6 2001:559:875f::/48 valid
- v6 2001:559:8773::/48 valid
- v6 2001:559:87b2::/48 valid
- v6 2001:559:8a::/48 valid
- v6 2001:559:c071::/48 valid
- v6 2001:559:c0::/48 valid
- v6 2001:559:c0f6::/48 valid
- v6 2001:559:c0f7::/48 valid
- v6 2001:559:c10a::/48 valid
- v6 2001:559:c174::/48 valid
- v6 2001:559:c1a5::/48 valid
- v6 2001:559:c1ca::/48 valid
- v6 2001:559:c28f::/48 valid
- v6 2001:559:c290::/48 valid
- v6 2001:559:c2a7::/48 valid
- v6 2001:559:c344::/48 valid
- v6 2001:559:c3e9::/48 valid
- v6 2001:559:c458::/48 valid
- v6 2001:559:c45f::/48 valid
- v6 2001:559:c460::/48 valid
- v6 2001:559:c4db::/48 valid
- v6 2001:559:c4f6::/48 valid
- v6 2001:559:c515::/48 valid
- v6 2001:559:c538::/48 valid
- v6 2001:559:f7::/48 valid
RPKI: rpki.cloudflare.com · 2026-06-21
Routing: 18 IPv4 · 61 IPv6 announced · RIS visibility 326/326 RIS peers · RIPEstat · 2026-06-21
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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