AS18937 National Monitoring Center 🇺🇸 US
Announcing 2 prefixes, seen at the RIS collectors.
IPv4 prefixes
2
512 (2 × /24)
IPv6 prefixes
0
-
Upstreams
3
transit providers observed
Peers
1
settlement-free adjacencies
Downstreams
0
transit customers observed
Customer cone
0
ASes reachable through it
Registry and operator data
- AS number
- AS18937
- Name
- National Monitoring Center
- Organisation
- National Monitoring Center
- Country
- 🇺🇸 US
- RIR
- ARIN
- Allocated
- 2007-04-17
RPKI coverage of this AS
Its own announcements, validated against the current ROA set
Announced prefixes
2 in total
| Prefix | RPKI | Peers | Sample path | First seen |
|---|---|---|---|---|
| 12.197.228.0/24 v4 | no ROA | 44 | 701818937 | 2026-09-18 |
| 67.129.151.0/24 v4 | no ROA | 42 | 354918937 | 2026-09-18 |