216.21.18.0/23
🇺🇸CIDR
216.21.18.0/23
IP Version
IPv4
Addresses
512
Mask
/23 (255.255.254.0)
Country
🇺🇸 United States
City
Washington D.C. (Northeast Washington)
RIR
ARIN
Status
allocated
Allocated
7/8/2015
Announced BGP Routes
0 of 0 routesRPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| This prefix is not currently announced in BGP. See covering prefix below. | ||||
Covering Prefix
2 less-specific announcements| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 216.21.18.0/24 | AS5721NDU-NET - National Defense University | No ROA | — | 6/1/2026 |
| 216.21.19.0/24 | AS5721NDU-NET - National Defense University | No ROA | — | 6/1/2026 |
Geolocation
Country🇺🇸United StatesUS
RegionDistrict of Columbia
CityWashington D.C. (Northeast Washington)
Coordinates38.9363, -76.9924 ↗
API
Open https://api.ipctl.io/v1/prefix/216.21.18.0/23Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/216.21.18.0/23" | jq
External Links