AS4
🇺🇸ISI-AS - University of Southern California8f5d315929a560376b0b58b40a1932fa
ARINassigned
Announced Prefixes (BGP)
52total
45 IPv47 IPv6
IPv4 Addresses ⓘ
Allocated (RIR)65,536
Announced (BGP)70,400
IPv6 Addresses ⓘ
Allocated (RIR)7.9×10^28
Announced (BGP)7.9×10^28
Prefix Limit (IPv4)
100
Prefix Limit (IPv6)
50
Country
🇺🇸 US
RIR
ARIN
Status
assigned
Allocated
2/22/1984
Announced Prefixes
(BGP)52|
Prefix | RPKI | IRR | Last Seen |
|---|---|---|---|
| No ROA | — | 5/24/2026 | |
| No ROA | — | 5/24/2026 | |
| No ROA | — | 5/24/2026 | |
| No ROA | — | 5/24/2026 | |
| No ROA | — | 5/24/2026 | |
| No ROA | — | 5/24/2026 | |
| No ROA | — | 5/24/2026 | |
| No ROA | — | 5/24/2026 | |
| No ROA | — | 5/24/2026 | |
| No ROA | — | 5/24/2026 |
1–10 of 52
1 / 6
Allocated Prefixes
(RIR)2Prefix | Country | RIR | Status |
|---|---|---|---|
| 128.9.0.0/16 | 🇺🇸 US | ARIN | allocated |
| 2606:d5c0::/32 | 🇺🇸 US | ARIN | allocated |
ASPA
No ASPA
External Links
API
Open https://api.ipctl.io/v1/asn/4Returns ASN details, announced prefixes, and BGP routing data.
curl -s "https://api.ipctl.io/v1/asn/4" | jq