137.51.0.0/16 no ROA
Announced by AS1906 Northrop Grumman.
Origin
| Origin AS | RPKI | Peers seeing it | Sample path | First seen | Last seen |
|---|---|---|---|---|---|
| AS1906 Northrop Grumman | no ROA | 40 | 70181906 | 2026-09-18 | 2026-10-01 |
RPKI
No ROA covers this prefix
No ROA covers this prefix, so origin validation returns "unknown". That is not a fault; most of the table is still unsigned.
Registry
Who this address space is delegated to, regardless of whether it is routed
- Delegated block
- 137.51.0.0/16
- RIR
- ARIN
- Country
- 🇺🇸 US
- Status
- allocated
- Allocated
- 1991-03-08
Less specific routes
Announced prefixes that contain this one
Nothing less specific is announced.
More specific routes
2 announced prefixes inside this one
| Prefix | Origin | RPKI | Peers | First seen |
|---|---|---|---|---|
| 137.51.246.0/24 v4 | AS2687 AT&T Enterprises, LLC | no ROA | 39 | 2026-09-18 |
| 137.51.247.0/24 v4 | AS2687 AT&T Enterprises, LLC | no ROA | 39 | 2026-09-23 |