152.55.188.0/22 - Railway (AS400940)
CIDR
152.55.188.0/22
IP Version
IPv4
Addresses
1K
Mask
/22 (255.255.252.0)
Country
🇺🇸 United States
City
San Francisco (Financial District)
RIR
ARIN
Status
announced
Allocated
-
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
Swipe sideways to see all columns →
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 152.55.188.0/22 | AS400940 RAILWAY - Railway | Valid | ARIN | 2026-10-11 |
Covering Prefix
1 less-specific announcement| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 152.55.176.0/20 | AS81 NCREN - MCNC | No ROA | - | 2026-10-11 |
RPKI ROAs
| Prefix | Origin | Max Length | Trust Anchor |
|---|---|---|---|
| 152.55.188.0/22 | AS400940 | /32 | arin |
IRR Route Objects
| Origin | Registry | Maintainer | Modified |
|---|---|---|---|
| AS400940 | ARIN | MNT-RC-1550 | 2026-09-26 |
Transfer History
Registry transfers of 152.55.188.0/22, blocks inside it, or blocks containing it.
- 152.55.176.0/20Transfer ·
| Date | Resource | From | To | Type |
|---|---|---|---|---|
| 152.55.176.0/20 | Transfer |
Origin ASN
AS400940
RAILWAY - Railway
Related Prefixes
Geolocation
Country🇺🇸United StatesUS
RegionCalifornia
CitySan Francisco (Financial District)
Coordinates37.7900, -122.4010 ↗
Learn more
- RPKI and ROAs explainedWhat RPKI valid, invalid and no ROA mean
- RPKI validatorCheck ROA coverage for any prefix or ASN
- What is BGP?How prefixes are announced and routed
- More-specific prefixesGlossary: covering and more-specific routes
- IPv4 transfers in the ARIN regionWho bought and sold address space recently
API
Open https://api.ipctl.io/v1/prefix/152.55.188.0/22Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/152.55.188.0/22" | jq
External Links