51.132.0.0/16 - Microsoft Corporation (AS8075)
CIDR
51.132.0.0/16
IP Version
IPv4
Addresses
65.5K
Mask
/16 (255.255.0.0)
Country
🇬🇧 United Kingdom
City
London
RIR
RIPE NCC
Status
assigned
Allocated
1993-09-01
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
Swipe sideways to see all columns →
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 51.132.0.0/16 | AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation | Valid | Other IRRRIPE | 2026-10-12 |
RPKI ROAs
| Prefix | Origin | Max Length | Trust Anchor |
|---|---|---|---|
| 51.132.0.0/16 | AS8075 | /16 | ripe |
More Specific Prefixes
| Prefix | AS | Country | Status |
|---|---|---|---|
| 51.132.0.0/17 | 🇬🇧GB | assigned | |
| 51.132.128.0/17 | 🇬🇧GB | assigned |
Related Prefixes
More prefixes of AS8075
All prefixes of AS8075 →Geolocation
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 RIPE NCC regionWho bought and sold address space recently
API
Open https://api.ipctl.io/v1/prefix/51.132.0.0/16Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/51.132.0.0/16" | jq
External Links