128.231.3.0/24
🇺🇸CIDR
128.231.3.0/24
IP Version
IPv4
Addresses
256
Mask
/24 (255.255.255.0)
Country
🇺🇸 United States
City
Cahokia
RIR
ARIN
Status
announced
Allocated
-
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 128.231.3.0/24 | AS3527NIH-NET - National Institutes of Health | Valid | RADB | 5/30/2026 |
Covering Prefix
1 less-specific announcement| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 128.231.0.0/16 | AS3527NIH-NET - National Institutes of Health | Valid | — | 5/30/2026 |
Geolocation
API
Open https://api.ipctl.io/v1/prefix/128.231.3.0/24Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/128.231.3.0/24" | jq
External Links