206208 looking glass

AS25577 MAINFRAME & CYBERNETIC SYSTEMS LIMITED 🇬🇧 GB

Announcing 53 prefixes, seen at the RIS collectors.

IPv4 prefixes
52
54,784 (214 × /24)
IPv6 prefixes
1
1 × /32
Upstreams
4
transit providers observed
Peers
17
settlement-free adjacencies
Downstreams
10
transit customers observed
Customer cone
18
ASes reachable through it

Registry and operator data

AS number
AS25577
Name
MAINFRAME & CYBERNETIC SYSTEMS LIMITED
Organisation
MAINFRAME & CYBERNETIC SYSTEMS LIMITED
Country
🇬🇧 GB
RIR
RIPENCC
Allocated
2003-01-15
Network type
NSP
Traffic levels
10-20Gbps
Scope
Europe
Peering policy
Selective
IRR as-set
AS-C4L
Website
http://bec.uk
Looking glass
https://lg.as25577.net
PeeringDB
net/1540
Exchanges
3
Facilities
25

RPKI coverage of this AS

Its own announcements, validated against the current ROA set

11 valid (20.8%) 0 invalid (0.0%) 42 no ROA (79.2%)

Announcement history

One point per day, recorded at each table import

01326395209-1809-2510-0210-0910-1610-2310-3010-31
IPv4 IPv6

Recorded changes

New prefixes and origin changes seen on the live stream

WhenChangePrefixOriginPath
2026-10-29 20:30:44Z origin change 178.251.238.0/24 AS25577 → AS48660 32884032772717433563223620548660
2026-10-29 20:30:28Z origin change 178.251.238.0/24 AS48660 → AS25577 503002151622147225577
2026-10-29 19:19:52Z origin change 178.251.238.0/24 AS25577 → AS48660 3492712993223620548660
2026-10-29 18:44:17Z origin change 178.251.238.0/24 AS48660 → AS25577 503002151622147225577
2026-10-26 11:24:31Z origin change 178.251.238.0/24 AS25577 → AS48660 3800134913223620548660
2026-10-26 11:24:29Z origin change 178.251.238.0/24 AS48660 → AS25577 503002151622147225577
2026-10-24 01:40:50Z origin change 178.251.238.0/24 AS25577 → AS48660 503003257620548660
2026-10-24 01:08:19Z origin change 178.251.238.0/24 AS48660 → AS25577 503002151622147225577
2026-10-17 00:46:30Z origin change 178.251.238.0/24 AS25577 → AS48660 3492712993223620548660
2026-10-17 00:08:37Z origin change 178.251.238.0/24 AS48660 → AS25577 503002151622147225577