129.57.0.0/16
🇺🇸CIDR
129.57.0.0/16
IP Version
IPv4
Addresses
65.5K
Mask
/16 (255.255.0.0)
Country
🇺🇸 United States
City
Newport News (Central Newport News)
RIR
ARIN
Status
allocated
Allocated
2/10/1988
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 129.57.0.0/16 | AS6406CEBAF - Thomas Jefferson National Accelerator Facility | No ROA | RADB | 5/30/2026 |
Geolocation
Country🇺🇸United StatesUS
RegionVirginia
CityNewport News (Central Newport News)
Coordinates37.0973, -76.4869 ↗
API
Open https://api.ipctl.io/v1/prefix/129.57.0.0/16Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/129.57.0.0/16" | jq
External Links