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AS25577
C4L-AS MAINFRAME & CYBERNETIC SYSTEMS LIMITED Announcing routesAS nameC4L-AS
Organisationlir-uk-frame-1-MNT
Registry (RIR)RIPE NCC
HandleAS25577
RangeAS25577
Registered15 Jan 2003
Last changed03 Mar 2026
Abuse contact[email protected]
53IPv4 prefixes
1IPv6 prefixes
54Upstreams
10Downstreams
Upstreams
| AS | Network name | Visibility |
|---|---|---|
| AS3257 | GTT-BACKBONE GTT Communications Inc. | 1288 |
| AS174 | COGENT-174 - Cogent Communications, LLC | 1063 |
| AS6939 | HURRICANE - Hurricane Electric LLC | 753 |
| AS3223 | VOXILITY Voxility LLP | 227 |
| AS25091 | IP-Max IP-Max SA | 97 |
| AS13030 | INIT7 Init7 (Switzerland) Ltd. | 86 |
| AS34549 | MEER-AS meerfarbig GmbH & Co. KG | 78 |
| AS205434 | Elasticity BE SLOUGH DC UK LIMITED | 75 |
| AS33891 | CORE-BACKBONE Core-Backbone GmbH | 69 |
| AS35280 | F5 F5 Networks SARL | 67 |
| AS50304 | BLIX Blix Solutions AS | 47 |
| AS5405 | INTERDOTLINK Inter.link GmbH | 46 |
| AS4637 | ASN-TELSTRA-GLOBAL - Telstra Global | 36 |
| AS37497 | Network Platforms (PTY) LTD - Network Platforms (PTY) LTD | 34 |
| AS14840 | AS14840 - BR.Digital Telecom | 32 |
Downstreams
| AS | Network name | Visibility |
|---|---|---|
| AS31708 | COREIX-UK-AS Coreix Ltd | 2593 |
| AS59493 | MIMIC Cudo Ventures Ltd | 381 |
| AS44934 | ARACHSYS Arachsys Internet Services Ltd | 241 |
| AS50882 | MAXNETT Maxnett Ltd. | 239 |
| AS51572 | CERULEAN Cerulean Solutions Limited | 229 |
| AS218531 | wsd-as-uk WallStreetDocs Ltd | 228 |
| AS203035 | xc360 Xara Computers (UK) Ltd | 112 |
| AS49485 | HAHOSTING High Availability Hosting Limited | 91 |
| AS205434 | Elasticity BE SLOUGH DC UK LIMITED | 23 |
| AS206626 | PSDGroup-AS Professional Software Design Ltd | 3 |
IPv4 prefixes (53)
37.58.24.0/2284.45.64.0/18185.5.88.0/2285.159.88.0/2477.73.11.0/2431.3.223.0/2481.27.87.0/2482.197.72.0/2485.159.95.0/2437.58.29.0/24178.251.238.0/24109.104.98.0/245.133.191.0/2481.27.80.0/2284.45.8.0/2184.45.75.0/2478.40.61.0/2481.27.95.0/2481.27.75.0/24178.251.239.0/24109.104.100.0/235.133.184.0/2277.73.15.0/2481.27.92.0/24109.104.105.0/2484.45.16.0/2031.3.211.0/2431.3.221.0/2431.3.208.0/24109.104.124.0/2281.27.88.0/2281.27.81.0/2481.27.66.0/23178.251.233.0/245.133.188.0/23109.68.68.0/24109.104.96.0/2381.27.92.0/23109.68.64.0/2381.27.94.0/2485.159.90.0/23109.104.120.0/2184.45.32.0/19109.104.112.0/2478.40.56.0/23109.104.122.0/2381.27.88.0/21109.104.114.0/2481.27.76.0/2431.3.212.0/23109.104.116.0/2281.27.72.0/2381.27.64.0/24
IPv6 prefixes (1)
RPKI-validate all prefixes of AS25577
Contacts
| Role | Name | Handle | Email / phone | Address |
|---|---|---|---|---|
| administrative, technical | Admin | AA46272-RIPE | +442045830986 | UNITED KINGDOM, London, EC2M 1NH, New Broad Street House, 35 New Broad Street |
| registrant | lir-uk-frame-1-MNT | lir-uk-frame-1-MNT | ||
| registrant | MAINFRAME & CYBERNETIC SYSTEMS LIMITED | ORG-MCSL9-RIPE | +442045830986 | New Broad Street House, 35 New Broad Street, EC2M 1NH, London, UNITED KINGDOM |
| registrant | RIPE-NCC-END-MNT | RIPE-NCC-END-MNT | ||
| abuse | Abuse-C Role | AR79596-RIPE | [email protected] | UNITED KINGDOM, London, EC2M 1NH, New Broad Street House, 35 New Broad Street |
| registrant | lir-uk-frame-1-MNT | lir-uk-frame-1-MNT |
Raw registry response
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"startAutnum": 25577,
"endAutnum": 25577,
"name": "C4L-AS",
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}
],
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],
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}
],
"remarks": [
{
"description": [
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"Transit Customers",
"Hosting Systems UK Private Peering",
"UK Dedicated Transit",
"Thinkgrid",
"Transversal",
"Noomobile",
"EurISP",
"Orbis Telecom",
"Contactual",
"DigiMedia",
"Upstream Internet",
"Selection Services Ltd",
"Thermeon BGP",
"One Connect",
"Interfax Communications",
"WebAge Limited",
"Accesspoint Technologies",
"**********************************",
"*** Transit Suppliers ***",
"NTT",
"TINET",
"Seabone",
"*** LINX/LONAP & Private Peers ***",
"*** Full Transit Customers ***"
]
}
],
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"rel": "rdap-up",
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"type": "application/rdap+json"
},
{
"value": "https://rdap.db.ripe.net/autnum/25577",
"rel": "rdap-up rdap-active",
"href": "https://rdap.db.ripe.net/autnums/rirSearch1/rdap-up/AS25577?status=active",
"type": "application/rdap+json"
},
{
"value": "https://rdap.db.ripe.net/autnum/25577",
"rel": "rdap-down",
"href": "https://rdap.db.ripe.net/autnums/rirSearch1/rdap-down/AS25577",
"type": "application/rdap+json"
},
{
"value": "https://rdap.db.ripe.net/autnum/25577",
"rel": "rdap-top",
"href": "https://rdap.db.ripe.net/autnums/rirSearch1/rdap-top/AS25577",
"type": "application/rdap+json"
},
{
"value": "https://rdap.db.ripe.net/autnum/25577",
"rel": "rdap-top rdap-active",
"href": "https://rdap.db.ripe.net/autnums/rirSearch1/rdap-top/AS25577?status=active",
"type": "application/rdap+json"
},
{
"value": "https://rdap.db.ripe.net/autnum/25577",
"rel": "rdap-bottom",
"href": "https://rdap.db.ripe.net/autnums/rirSearch1/rdap-bottom/AS25577",
"type": "application/rdap+json"
},
{
"value": "https://rdap.db.ripe.net/autnum/25577",
"rel": "self",
"href": "https://rdap.db.ripe.net/autnum/25577",
"type": "application/rdap+json"
},
{
"value": "http://www.ripe.net/data-tools/support/documentation/terms",
"rel": "copyright",
"href": "http://www.ripe.net/data-tools/support/documentation/terms"
}
],
"events": [
{
"eventAction": "registration",
"eventDate": "2003-01-15T11:46:06Z"
},
{
"eventAction": "last changed",
"eventDate": "2026-03-03T11:00:16Z"
}
],
"rdapConformance": [
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"rirSearch1",
"autnums",
"cidr0",
"rdap_level_0",
"nro_rdap_profile_0",
"redacted"
],
"notices": [
{
"title": "Filtered",
"description": [
"This output has been filtered."
]
},
{
"title": "Whois Inaccuracy Reporting",
"description": [
"If you see inaccuracies in the results, please visit:"
],
"links": [
{
"value": "https://rdap.db.ripe.net/autnum/25577",
"rel": "inaccuracy-report",
"href": "https://www.ripe.net/contact-form?topic=ripe_dbm&show_form=true",
"type": "text/html"
}
]
},
{
"title": "Source",
"description": [
"Objects returned came from source",
"RIPE"
]
},
{
"title": "Terms and Conditions",
"description": [
"This is the RIPE Database query service. The objects are in RDAP format."
],
"links": [
{
"value": "https://rdap.db.ripe.net/autnum/25577",
"rel": "terms-of-service",
"href": "http://www.ripe.net/db/support/db-terms-conditions.pdf",
"type": "application/pdf"
}
]
}
],
"port43": "whois.ripe.net",
"objectClassName": "autnum",
"redacted": [
{
"name": {
"description": "Personal e-mail information"
},
"reason": {
"description": "Personal data"
},
"prePath": "$.entities[?(@.handle=='AA46272-RIPE')].vcardArray[1][?(@[0]=='e-mail')]",
"method": "removal"
},
{
"name": {
"description": "Personal e-mail information"
},
"reason": {
"description": "Personal data"
},
"prePath": "$.entities[?(@.handle=='ORG-MCSL9-RIPE')].vcardArray[1][?(@[0]=='e-mail')]",
"method": "removal"
},
{
"name": {
"description": "Personal e-mail information"
},
"reason": {
"description": "Personal data"
},
"prePath": "$.entities[?(@.handle=='AR79596-RIPE')].vcardArray[1][?(@[0]=='e-mail')]",
"method": "removal"
}
]
}Results come from public internet registries and live global routing data. Results are cached for up to an hour. Lookups are logged with your IP address to prevent abuse — see our Privacy Policy.