63.251.0.0/21
🇺🇸IPv4ARINallocatedNo ROA
CIDR
63.251.0.0/21
IP Version
IPv4
Addresses
2K
Mask
/21 (255.255.248.0)
Country
🇺🇸 United States
City
Chicago (West Loop)
RIR
ARIN
Status
allocated
Allocated
12/2/1999
Announced BGP Routes
0 of 0 routesRPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| This prefix is not currently announced in BGP. See covering prefix below. | ||||
Covering Prefix
2 less-specific announcements| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 63.251.0.0/20 | AS14744INTERNAP-BLOCK-4 - Unitas Global | No ROA | — | 6/1/2026 |
| 63.251.4.0/23 | AS63410PRIVATESYSTEMS - PrivateSystems Networks | No ROA | — | 6/1/2026 |
Geolocation
API
Open https://api.ipctl.io/v1/prefix/63.251.0.0/21Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/63.251.0.0/21" | jq
External Links