12.221.150.0/24
🇺🇸CIDR
12.221.150.0/24
IP Version
IPv4
Addresses
256
Mask
/24 (255.255.255.0)
Country
🇺🇸 United States
City
Silver Spring (Downtown Silver Spring)
RIR
ARIN
Status
announced
Allocated
-
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 12.221.150.0/24 | AS397977ANA-218-LB - American Nurses Association, Inc | No ROA | ARIN | 5/31/2026 |
Covering Prefix
2 less-specific announcements| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 12.0.0.0/8 | AS7018ATT-INTERNET4 - AT&T Enterprises, LLC | No ROA | — | 5/31/2026 |
| 12.128.0.0/9 | AS7018ATT-INTERNET4 - AT&T Enterprises, LLC | No ROA | — | 5/31/2026 |
IRR Route Objects
| Origin | Registry | Maintainer | Modified |
|---|---|---|---|
| AS397977 | ARIN | MNT-ANA-218 | 12/3/2025 |
Geolocation
Country🇺🇸United StatesUS
RegionMaryland
CitySilver Spring (Downtown Silver Spring)
Coordinates38.9949, -77.0315 ↗
API
Open https://api.ipctl.io/v1/prefix/12.221.150.0/24Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/12.221.150.0/24" | jq
External Links