66.186.128.0/20
🇺🇸CIDR
66.186.128.0/20
IP Version
IPv4
Addresses
4K
Mask
/20 (255.255.240.0)
Country
🇺🇸 United States
City
Washington D.C.
RIR
ARIN
Status
allocated
Allocated
11/8/2001
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 66.186.128.0/20 | AS11951MCSP - Medical Computer Systems | No ROA | RADB | 6/1/2026 |
Covering Prefix
1 less-specific announcement| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 66.186.129.0/24 | AS11951MCSP - Medical Computer Systems | No ROA | — | 6/1/2026 |
IRR Route Objects
| Origin | Registry | Maintainer | Modified |
|---|---|---|---|
| AS11951 | RADB | MAINT-AS3257 | 11/13/2023 |
Origin ASN
AS11951
MCSP - Medical Computer Systems
Geolocation
API
Open https://api.ipctl.io/v1/prefix/66.186.128.0/20Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/66.186.128.0/20" | jq
External Links