204.152.42.0/23
🇺🇸CIDR
204.152.42.0/23
IP Version
IPv4
Addresses
512
Mask
/23 (255.255.254.0)
Country
🇺🇸 United States
City
Washington D.C. (Northwest Washington)
RIR
ARIN
Status
allocated
Allocated
11/18/1994
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 204.152.42.0/23 | AS11951MCSP - Medical Computer Systems | No ROA | RADB | 5/31/2026 |
Covering Prefix
2 less-specific announcements| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 204.152.42.0/24 | AS11951MCSP - Medical Computer Systems | No ROA | — | 5/31/2026 |
| 204.152.43.0/24 | AS11951MCSP - Medical Computer Systems | No ROA | — | 5/31/2026 |
IRR Route Objects
| Origin | Registry | Maintainer | Modified |
|---|---|---|---|
| AS11951 | RADB | MAINT-AS174 | 11/13/2023 |
Origin ASN
AS11951
MCSP - Medical Computer Systems
Geolocation
Country🇺🇸United StatesUS
RegionDistrict of Columbia
CityWashington D.C. (Northwest Washington)
Coordinates38.9136, -77.0464 ↗
API
Open https://api.ipctl.io/v1/prefix/204.152.42.0/23Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/204.152.42.0/23" | jq
External Links