199.253.128.0/21
🇺🇸CIDR
199.253.128.0/21
IP Version
IPv4
Addresses
2K
Mask
/21 (255.255.248.0)
Country
🇺🇸 United States
City
Fargo (Willow Park)
RIR
ARIN
Status
allocated
Allocated
1/19/1995
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 199.253.128.0/21 | AS13660BCBSND-AS - Blue Cross Blue Shield of North Dakota | Valid | RADB | 5/31/2026 |
Covering Prefix
1 less-specific announcement| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 199.253.128.0/24 | AS13660BCBSND-AS - Blue Cross Blue Shield of North Dakota | Invalid | — | 5/31/2026 |
Geolocation
API
Open https://api.ipctl.io/v1/prefix/199.253.128.0/21Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/199.253.128.0/21" | jq
External Links