Autonomous System
AS25577 — C4L-AS - MAINFRAME & CYBERNETIC SYSTEMS LIMITED(GB)
Last fetched
AS25577 is an Autonomous System operated by C4L-AS - MAINFRAME & CYBERNETIC SYSTEMS LIMITED and registered in GB. As of Sun, 06 Sep 2026 12:48:12 GMT, it announces 53 routed IP prefixes and peers with 30 other Autonomous Systems in the WhisperGraph BGP dataset.
Nutrition Label
Routing footprint
AS25577 announces 53 distinct routed prefixes. The 25-prefix sample below links to per-prefix pages with full conflict and reverse-DNS detail.
- 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
- 81.27.81.0/24
- 81.27.80.0/22
- 81.27.87.0/24
- 81.27.88.0/22
- 81.27.88.0/21
- 81.27.92.0/24
Peering ecosystem
30 distinct peers via BGP. The first 30 are listed below.
| Peer ASN | Operator | Country |
|---|---|---|
| AS174 | COGENT-174 - Cogent Communications, LLC | US |
| AS17639 | CONVERGE-AS - Converge ICT Solutions Inc. | PH |
| AS203035 | xc360 - Xara Computers (UK) Ltd | GB |
| AS205434 | Elasticity - BE SLOUGH DC UK LIMITED | GB |
| AS206626 | PSDGroup-AS - Professional Software Design Ltd | GB |
| AS207162 | l3climited-as - L3C Limited | GB |
| AS213241 | TECHIT - TECHIT.BE SRL | BE |
| AS24482 | SGGS-AS-AP - SG.GS | SG |
| AS25091 | IP-Max - IP-Max SA | CH |
| AS29075 | IELO - IELO-LIAZO SERVICES SAS | FR |
| AS29169 | GANDI-AS - GANDI SAS | FR |
| AS31500 | GNM-AS - Global Network Management Inc | AG |
| AS31708 | COREIX-UK-AS - Coreix Ltd | GB |
| AS3223 | VOXILITY - Voxility LLP | GB |
| AS3257 | GTT-BACKBONE - GTT Communications Inc. | US |
| AS3303 | SWISSCOM - Swisscom (Schweiz) AG | CH |
| AS34549 | MEER-AS - meerfarbig GmbH & Co. KG | DE |
| AS44934 | ARACHSYS - Arachsys Internet Services Ltd | GB |
| AS48185 | team_blue - team.blue NV | BE |
| AS48362 | TKSWF-AS - Stadtwerke Feldkirch | AT |
| AS49485 | HAHOSTING - High Availability Hosting Limited | GB |
| AS50300 | CUSTDC - CustodianDC Limited | GB |
| AS50304 | BLIX - Blix Solutions AS | NO |
| AS50882 | MAXNETT - Maxnett Ltd. | GB |
| AS51572 | CERULEAN - Cerulean Solutions Limited | GB |
| AS59493 | MIMIC - Cudo Ventures Ltd | GB |
| AS6939 | HURRICANE - Hurricane Electric LLC | US |
| AS7575 | AARNET-AS-AP - Australian Academic and Research Network (AARNet) | AU |
| AS8218 | NEO-ASN - Zayo Infrastructure France SA | FR |
| AS9002 | RETN-AS - RETN Limited | GB |
Blast radius
Count of dependent hostnames if AS25577 disappeared from the routing table.
4,828 hostnames depend on this network.Exact count across all 55 announced prefixes. Snapshot Wed, 15 Jul 2026 19:00:51 GMT.
MOAS / hijack watch
Prefixes routed by AS25577 that another Autonomous System also announces. A non-empty list is one of the strongest BGP-hijack signals available without active probes.
No active MOAS conflicts. Every prefix announced by AS25577 is unique to AS25577 in the current routing snapshot.
Threat posture
Related pages
Pivot deeper into the graph from AS25577.
Cypher and MCP
Reproduce the headline metric directly against graph.whisper.security:
MATCH (a:ASN {name: "AS25577"})-[:HAS_NAME]->(n:ASN_NAME)
OPTIONAL MATCH (a)-[:HAS_COUNTRY]->(c:COUNTRY)
RETURN a.name AS asn, n.name AS operator, c.name AS countryOr query Whisper from your own LLM workflow via the Whisper MCP server.