205.156.0.0/18
🇺🇸CIDR
205.156.0.0/18
IP Version
IPv4
Addresses
16.3K
Mask
/18 (255.255.192.0)
Country
🇺🇸 United States
City
Boulder
RIR
ARIN
Status
allocated
Allocated
3/3/1995
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 205.156.0.0/18 | AS3477NOAA-NWAVE - National Oceanic and Atmospheric Administration | Valid | ARIN | 5/31/2026 |
Covering Prefix
2 less-specific announcements| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 205.156.56.0/22 | AS26100NOAA-PACIFIC-REGION-CENTER - National Oceanic and Atmospheric Administration | Valid | — | 5/31/2026 |
| 205.156.60.0/24 | AS26100NOAA-PACIFIC-REGION-CENTER - National Oceanic and Atmospheric Administration | Valid | — | 5/31/2026 |
Geolocation
API
Open https://api.ipctl.io/v1/prefix/205.156.0.0/18Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/205.156.0.0/18" | jq
External Links