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ASN Lookup Tool
AS25577 C4L-AS

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ASN Extended Info API & BGP Active Prefixes API
ASN Details
ASN
AS25577
Organisation
MAINFRAME & CYBERNETIC SYSTEMS LIMITED
Name
C4L-AS
Total IPv4 Addresses
49,639
Total IPv4 Prefixes
59
Total IPv6 Prefixes
1
Total IPv4 Bogon Prefixes
0
Total IPv6 Bogon Prefixes
0
IPv4 Space Rank
#4,159 out of 79,886
Registry
Ripe
Registered Country
GB flagGB
Registered Country Name
United Kingdom of Great Britain and Northern Ireland (the)
Registered Date
2003-01-15
Registration Last Change
2026-03-03
Receiving From
ASN
Organisation
AS3257
US flagGTT Communications Inc.
AS3741
ZA flagDimension Data
AS36994
ZA flagVodacom
AS5413
GB flagWavenet Limited
AS13237
DE flageuNetworks GmbH
Showing 5 of 23
Transit To
ASN
Organisation
AS174
US flagCogent Communications, LLC
AS31708
GB flagCoreix Ltd
AS56990
GB flagSyscomm Limited
AS51572
GB flagCerulean Solutions Limited
AS59493
GB flagCudo Ventures Ltd
Showing 5 of 10
IPv4 Active Prefixes
PrefixRange FromRange To
5.133.184.0/225.133.184.05.133.187.255
5.133.188.0/235.133.188.05.133.189.255
5.133.191.0/245.133.191.05.133.191.255
31.3.208.0/2431.3.208.031.3.208.255
31.3.211.0/2431.3.211.031.3.211.255
Showing 5 of 59
IPv6 Active Prefixes
PrefixRange FromRange To
2001:9d8::/322001:9d8::2001:9d8:ffff:ffff:ffff:ffff:ffff:ffff