AS25577
MAINFRAME & CYBERNETIC SYSTEMS LIMITED ISP registered in United Kingdom
54IPv4 prefixes
1IPv6 prefixes
22%RPKI-valid
#1,677AS Rank
327/327RIS visibility
#67Rank in United Kingdom
2003-01-15Allocated
MAINFRAME & CYBERNETIC SYSTEMS LIMITED (AS25577) — ISP, registered in United Kingdom. announces 54 IPv4 prefixes + 1 IPv6 prefixes. Rank in United Kingdom: #67. Allocated: 2003-01-15.
IPv4 54IPv6 1
Announced prefixes · 55
- v4 109.104.100.0/23 valid
- v4 109.104.105.0/24 valid
- v4 109.104.112.0/24 valid
- v4 109.104.114.0/24 valid
- v4 109.104.116.0/22 unknown
- v4 109.104.120.0/21 unknown
- v4 109.104.122.0/23 valid
- v4 109.104.124.0/22 unknown
- v4 109.104.96.0/23 unknown
- v4 109.104.98.0/24 unknown
- v4 109.68.64.0/23 valid
- v4 109.68.68.0/24 valid
- v4 178.251.233.0/24 unknown
- v4 178.251.239.0/24 unknown
- v4 185.229.20.0/23 valid
- v4 185.5.88.0/22 unknown
- v4 31.3.208.0/24 valid
- v4 31.3.211.0/24 unknown
- v4 31.3.212.0/23 unknown
- v4 31.3.221.0/24 unknown
- v4 31.3.223.0/24 unknown
- v4 37.58.24.0/22 unknown
- v4 37.58.29.0/24 unknown
- v4 5.133.184.0/22 valid
- v4 5.133.188.0/23 unknown
- v4 5.133.191.0/24 unknown
- v4 62.69.143.0/24 unknown
- v4 77.73.11.0/24 unknown
- v4 77.73.15.0/24 unknown
- v4 78.40.56.0/23 unknown
- v4 78.40.61.0/24 unknown
- v4 81.27.64.0/24 unknown
- v4 81.27.66.0/23 unknown
- v4 81.27.72.0/23 unknown
- v4 81.27.75.0/24 unknown
- v4 81.27.76.0/24 unknown
- v4 81.27.80.0/22 unknown
- v4 81.27.81.0/24 unknown
- v4 81.27.87.0/24 unknown
- v4 81.27.88.0/21 unknown
- v4 81.27.88.0/22 unknown
- v4 81.27.92.0/23 unknown
- v4 81.27.92.0/24 unknown
- v4 81.27.94.0/24 unknown
- v4 81.27.95.0/24 unknown
- v4 82.197.72.0/24 unknown
- v4 84.45.16.0/20 unknown
- v4 84.45.32.0/19 valid
- v4 84.45.64.0/18 unknown
- v4 84.45.75.0/24 unknown
RPKI: rpki.cloudflare.com · 2026-06-17
Routing: 55 IPv4 · 1 IPv6 announced · RIS visibility 327/327 RIS peers · RIPEstat · 2026-06-17
Prefix history
Data table
| Day | Announced prefixes |
|---|---|
| 2026-06-12 | 55 |
| 2026-06-13 | 55 |
Internet Exchanges · 3
Facilities · 25
- Bournemouth Data Centre Bournemouth
- Digital Realty London LHR19 London
- Digital Realty London LHR20 London
- Digital Realty London LHR21 (closed) London
- Digital Realty London LON1-3 London
- Equinix LD3 - London, Park Royal London
- Equinix LD4 - London, Slough Slough
- Equinix LD5 - London, Slough Slough
- Equinix LD8 - London, Docklands London
- Equinix LD9 - London, Powergate London
- Equinix MA1 - Manchester, Williams/Kilburn Manchester
- Global Switch London East London
- Global Switch London North London
- Options IT - Park Royal Datacenter (PRDC) London
- Pulsant Croydon LN-1 Croydon
- Pulsant Maidenhead SE-2 Maidenhead
- Pulsant Milton Keynes SE-1 Milton Keynes
- QiComm Tutis Point London
- Redcentric London Data Centre London
- Telehouse - London (Docklands East) London
- Telehouse - London (Docklands North) London
- VIRTUS LONDON1 (Enfield) London
- VIRTUS LONDON2 (Hayes) Hayes
- VIRTUS LONDON4 (Slough) Slough
- Verne London London
AS topology · Customer cone 19
Peers · 100
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