AS21508 Comcast Cable Communications, LLC 🇺🇸 US
Announcing 78 prefixes, seen at the RIS collectors.
IPv4 prefixes
17
70,400 (275 × /24)
IPv6 prefixes
61
61 × /48
Upstreams
1
transit providers observed
Peers
0
settlement-free adjacencies
Downstreams
49
transit customers observed
Customer cone
20,129
ASes reachable through it
Registry and operator data
- AS number
- AS21508
- Name
- Comcast Cable Communications, LLC
- Organisation
- Comcast - Richmond
- Country
- 🇺🇸 US
- RIR
- ARIN
- Allocated
- 2001-05-16
- Network type
- Cable/DSL/ISP
- Scope
- Regional
- Peering policy
- Restrictive
- PeeringDB
- net/10095
- Facilities
- 1
RPKI coverage of this AS
Its own announcements, validated against the current ROA set
Announced prefixes
61 in total
| Prefix | RPKI | Peers | Sample path | First seen |
|---|---|---|---|---|
| 2001:559:8a::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:c0::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:f7::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:220::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:243::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:280::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:37d::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:3ac::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:3b9::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:3c8::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:40a::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:49a::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:49b::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:53c::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:5c9::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:5db::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:72b::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:73c::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:788::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:78a::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:79d::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:79e::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:7a7::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:7db::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:804c::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:81bf::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:81d7::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:81d8::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:8201::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:82fd::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:833e::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:8416::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:841c::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:8445::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:8535::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:85c1::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:85ff::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:8604::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:871a::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:875f::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:8773::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:87b2::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:c071::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:c0f6::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:c0f7::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:c10a::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:c174::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:c1a5::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:c1ca::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:c28f::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:c290::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:c2a7::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:c344::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:c3e9::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:c458::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:c45f::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:c460::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:c4db::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:c4f6::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:c515::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |
| 2001:559:c538::/48 v6 | RPKI valid | 32 | 852792221508 | 2026-09-18 |