81.27.80.0/22 - C4L MAINFRAME & CYBERNETIC SYSTEMS LIMITED (AS25577)
CIDR
81.27.80.0/22
IP Version
IPv4
Addresses
1K
Mask
/22 (255.255.252.0)
Country
🇬🇧 United Kingdom
City
London
RIR
RIPE NCC
Status
allocated
Allocated
2002-04-11
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
Swipe sideways to see all columns →
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 81.27.80.0/22 | AS25577 C4L-AS MAINFRAME & CYBERNETIC SYSTEMS LIMITED | No ROA | RIPE | 2026-10-11 |
More-Specific Announcements
1 more-specific announcement| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 81.27.81.0/24 | AS25577 C4L-AS MAINFRAME & CYBERNETIC SYSTEMS LIMITED | No ROA | - | 2026-10-11 |
IRR Route Objects
| Origin | Registry | Maintainer | Modified |
|---|---|---|---|
| AS25577 | RIPE | c4l-mnt | 2025-03-11 |
More Specific Prefixes
| Prefix | AS | Country | Status |
|---|---|---|---|
| 81.27.80.32/29 | 🇬🇧GB | assigned | |
| 81.27.80.160/29 | 🇬🇧GB | assigned | |
| 81.27.80.168/29 | 🇬🇧GB | assigned | |
| 81.27.80.176/29 | 🇬🇧GB | assigned | |
| 81.27.80.192/27 | 🇬🇧GB | assigned | |
| 81.27.80.224/28 | 🇬🇧GB | assigned | |
| 81.27.80.240/28 | 🇬🇧GB | assigned | |
| 81.27.81.32/27 | 🇬🇧GB | assigned | |
| 81.27.81.112/28 | 🇬🇧GB | assigned | |
| 81.27.81.128/27 | 🇬🇧GB | assigned | |
| 81.27.81.176/28 | 🇬🇧GB | assigned | |
| 81.27.82.144/28 | 🇬🇧GB | assigned | |
| 81.27.82.160/28 | 🇬🇧GB | assigned | |
| 81.27.82.176/28 | 🇬🇧GB | assigned | |
| 81.27.83.0/28 | 🇬🇧GB | assigned | |
| 81.27.83.96/28 | 🇬🇧GB | assigned | |
| 81.27.83.136/30 | 🇬🇧GB | assigned |
Transfer History
Registry transfers of 81.27.80.0/22, blocks inside it, or blocks containing it.
- 81.27.80.0/22Transfer ·
- 81.27.80.0/20Transfer ·
Related Prefixes
More prefixes of AS25577
All prefixes of AS25577 →Geolocation
Abuse Contact
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/81.27.80.0/22Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/81.27.80.0/22" | jq
External Links