81.27.80.0/20 - BGP Prefix
IPv4not announcedNo ROA
CIDR
81.27.80.0/20
IP Version
IPv4
Addresses
4K
Mask
/20 (255.255.240.0)
Country
🇬🇧 United Kingdom
City
London
Status
not announced
Allocated
-
Announced BGP Routes
0 of 0 routesRPKI:
IRR:
Swipe sideways to see all columns →
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| This prefix is not announced as a whole. Parts of it are announced as more-specific prefixes, see below. | ||||
More-Specific Announcements
12 more-specific announcements| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 81.27.80.0/22 | AS25577 C4L-AS MAINFRAME & CYBERNETIC SYSTEMS LIMITED | No ROA | - | 2026-10-11 |
| 81.27.81.0/24 | AS25577 C4L-AS MAINFRAME & CYBERNETIC SYSTEMS LIMITED | No ROA | - | 2026-10-11 |
| 81.27.84.0/24 | AS57797 SYSLEVEL SysLevel SAS | Valid | - | 2026-10-11 |
| 81.27.84.0/24 | AS198839 MCASYS SysLevel SAS | Invalid | - | 2026-10-11 |
| 81.27.86.0/24 | AS208172 PV-HOSTED Proton AG | Valid | - | 2026-10-11 |
| 81.27.87.0/24 | AS25577 C4L-AS MAINFRAME & CYBERNETIC SYSTEMS LIMITED | No ROA | - | 2026-10-11 |
| 81.27.88.0/21 | AS25577 C4L-AS MAINFRAME & CYBERNETIC SYSTEMS LIMITED | No ROA | - | 2026-10-11 |
| 81.27.88.0/22 | AS25577 C4L-AS MAINFRAME & CYBERNETIC SYSTEMS LIMITED | No ROA | - | 2026-10-11 |
| 81.27.92.0/23 | AS25577 C4L-AS MAINFRAME & CYBERNETIC SYSTEMS LIMITED | No ROA | - | 2026-10-11 |
| 81.27.92.0/24 | AS25577 C4L-AS MAINFRAME & CYBERNETIC SYSTEMS LIMITED | No ROA | - | 2026-10-11 |
| 81.27.94.0/24 | AS25577 C4L-AS MAINFRAME & CYBERNETIC SYSTEMS LIMITED | No ROA | - | 2026-10-11 |
| 81.27.95.0/24 | AS25577 C4L-AS MAINFRAME & CYBERNETIC SYSTEMS LIMITED | No ROA | - | 2026-10-11 |
More Specific Prefixes
Transfer History
Registry transfers of 81.27.80.0/20, blocks inside it, or blocks containing it.
- 81.27.94.0/23Transfer ·
- 81.27.92.0/24Transfer ·
- 81.27.88.0/22Transfer ·
- 81.27.87.0/24Transfer ·
- 81.27.85.0/24Transfer ·
- 81.27.80.0/22Transfer ·
- 81.27.93.0/24Transfer ·
- 81.27.86.0/24Transfer ·
- 81.27.84.0/24Transfer ·
- 81.27.80.0/20Transfer ·
| Date | Resource | From | To | Type |
|---|---|---|---|---|
| 81.27.94.0/23 | Transfer | |||
| 81.27.92.0/24 | Transfer | |||
| 81.27.88.0/22 | Transfer | |||
| 81.27.87.0/24 | Transfer | |||
| 81.27.85.0/24 | Transfer | |||
| 81.27.80.0/22 | Transfer | |||
| 81.27.93.0/24 | Transfer | |||
| 81.27.86.0/24 | Transfer | |||
| 81.27.84.0/24 | Transfer | |||
| 81.27.80.0/20 | DHMS Ltd | IDE Group Connect Limited | Transfer |
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 transfer marketTransfers published by all five RIRs
API
Open https://api.ipctl.io/v1/prefix/81.27.80.0/20Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/81.27.80.0/20" | jq
External Links