MAINFRAME & CYBERNETIC SYSTEMS LIMITED operates AS25577: 53 IPv4 prefixes covering 49,152 addresses, most of them in 
United Kingdom.
By IPv4 addresses the network ranks #3,942 worldwide and #86 of 1,931 networks in United Kingdom. That is 0.04% of the country’s IPv4 space.
The network spreads across 5 countries: United Kingdom 97%, Türkiye 1.0%, Netherlands 1.0%.
The largest block is 84.45.51.0 to 84.45.127.255 with 19,712 addresses, geolocated to Poole (Branksome).
- IPv4 addresses
- 49,152
- IPv4 prefixes
- 53
- World rank
- #3,942
- Country share
- 0.04%
- IPv6 ranges
- 1
Addresses by country
- United Kingdom 97%
Türkiye 1.0%
Netherlands 1.0%
Germany 0.52%
Congo - Brazzaville 0.44%
Largest blocks
- 84.45.51.0 Poole (Branksome)19,712
- 84.45.32.0 Croydon4,608
- 84.45.16.0 Bournemouth3,584
- 81.27.87.0 London2,304
- 84.45.8.0 Westminster1,792
- 109.104.122.0 Riseley1,536
- 5.133.184.0 Weybridge1,536
- 185.5.88.0 London (Temple)1,024
Networks of similar size
49,408
49,408
49,152
49,152IPv4 prefixes
- 5.133.184.0/22
- 5.133.188.0/23
- 5.133.191.0/24
- 31.3.208.0/24
- 31.3.211.0/24
- 31.3.212.0/23
- 31.3.221.0/24
- 31.3.223.0/24
- 37.58.24.0/22
- 37.58.29.0/24
- 77.73.11.0/24
- 77.73.15.0/24
- 78.40.56.0/23
- 78.40.61.0/24
- 81.27.64.0/24
- 81.27.66.0/23
- 81.27.72.0/23
- 81.27.75.0/24
- 81.27.76.0/24
- 81.27.80.0/22
- 81.27.87.0/24
- 81.27.88.0/21
- 82.197.72.0/24
- 84.45.8.0/22
- 84.45.12.0/23
- 84.45.14.0/24
- 84.45.16.0/21
- 84.45.24.0/22
- 84.45.28.0/23
- 84.45.32.0/20
- 84.45.48.0/23
- 84.45.51.0/24
- 84.45.52.0/22
- 84.45.56.0/21
- 84.45.64.0/18
- 85.159.88.0/24
- 85.159.90.0/23
- 85.159.95.0/24
- 109.68.64.0/23
- 109.68.68.0/24
- 109.104.96.0/24
- 109.104.98.0/24
- 109.104.100.0/23
- 109.104.105.0/24
- 109.104.112.0/24
- 109.104.114.0/24
- 109.104.116.0/22
- 109.104.122.0/23
- 109.104.124.0/22
- 178.251.233.0/24
- 178.251.238.0/23
- 185.5.88.0/22
- 185.132.181.0/24
Questions and answers
Who owns AS25577?
Autonomous system AS25577 is operated by MAINFRAME & CYBERNETIC SYSTEMS LIMITED.
How many IP addresses does AS25577 have?
The network holds 49,152 IPv4 addresses in 53 prefixes, plus 1 IPv6 ranges.
Which country is AS25577 in?
The main country is United Kingdom, with addresses in 4 more countries.
How big is AS25577?
By IPv4 addresses it ranks #3,942 worldwide.
What is the largest address block of AS25577?
84.45.51.0 to 84.45.127.255, 19,712 addresses.