12.72.40.0/21
🇺🇸CIDR
12.72.40.0/21
IP Version
IPv4
Addresses
2K
Mask
/21 (255.255.248.0)
Country
🇺🇸 United States
City
Morristown
RIR
ARIN
Status
announced
Allocated
-
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 12.72.40.0/21 | AS20057ATT-MOBILITY-LLC-AS20057 - AT&T Enterprises, LLC | No ROA | — | 5/30/2026 |
Covering Prefix
3 less-specific announcements| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 12.0.0.0/8 | AS7018ATT-INTERNET4 - AT&T Enterprises, LLC | No ROA | — | 5/30/2026 |
| 12.0.0.0/9 | AS7018ATT-INTERNET4 - AT&T Enterprises, LLC | No ROA | — | 5/30/2026 |
| 12.72.0.0/17 | AS20057ATT-MOBILITY-LLC-AS20057 - AT&T Enterprises, LLC | No ROA | — | 5/30/2026 |
Geolocation
API
Open https://api.ipctl.io/v1/prefix/12.72.40.0/21Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/12.72.40.0/21" | jq
External Links