AS21508
🇺🇸COMCAST-21508 - Comcast Cable Communications, LLC3a7b40ab58f6de4849b12c87e5806b7c
ARINassigned
Announced Prefixes (BGP)
229total
157 IPv472 IPv6
IPv4 Addresses ⓘ
Allocated (RIR)65,536
Announced (BGP)1.3M
IPv6 Addresses ⓘ
Allocated (RIR)0
Announced (BGP)1×10^31
Prefix Limit (IPv4)
500
Prefix Limit (IPv6)
500
Country
🇺🇸 US
RIR
ARIN
Status
assigned
Allocated
5/16/2001
Announced Prefixes
(BGP)229|
Prefix | RPKI | IRR | Last Seen |
|---|---|---|---|
| Valid | — | 5/28/2026 | |
| Valid | — | 5/28/2026 | |
| Valid | — | 5/28/2026 | |
| Valid | — | 5/28/2026 | |
| Valid | — | 5/28/2026 | |
| Valid | — | 5/28/2026 | |
| Valid | RADB | 5/28/2026 | |
| Valid | — | 5/28/2026 | |
| Valid | — | 5/28/2026 | |
| Valid | — | 5/28/2026 |
1–10 of 229
1 / 23
Allocated Prefixes
(RIR)1Prefix | Country | RIR | Status |
|---|---|---|---|
| 141.104.0.0/16 | 🇺🇸 US | ARIN | allocated |
ASPA
No ASPA
External Links
API
Open https://api.ipctl.io/v1/asn/21508Returns ASN details, announced prefixes, and BGP routing data.
curl -s "https://api.ipctl.io/v1/asn/21508" | jq