137.51.0.0/16
🇺🇸CIDR
137.51.0.0/16
IP Version
IPv4
Addresses
65.5K
Mask
/16 (255.255.0.0)
Country
🇺🇸 United States
City
Bethpage
RIR
ARIN
Status
allocated
Allocated
3/8/1991
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 137.51.0.0/16 | AS1906NORTHROP-GRUMMAN - Northrop Grumman | No ROA | — | 5/31/2026 |
Covering Prefix
2 less-specific announcements| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 137.51.246.0/24 | AS2687ATGS-MMD-AS - AT&T Enterprises, LLC | No ROA | — | 5/31/2026 |
| 137.51.247.0/24 | AS2687ATGS-MMD-AS - AT&T Enterprises, LLC | No ROA | — | 5/31/2026 |
Geolocation
API
Open https://api.ipctl.io/v1/prefix/137.51.0.0/16Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/137.51.0.0/16" | jq
External Links