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ASN Lookup Tool
AS3300 BT

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ASN Extended Info API & BGP Active Prefixes API
ASN Details
ASN
AS3300
Organisation
British Telecommunications PLC
Name
BT
Total IPv4 Addresses
513,264
Total IPv4 Prefixes
183
Total IPv6 Prefixes
69
Total IPv4 Bogon Prefixes
0
Total IPv6 Bogon Prefixes
0
IPv4 Space Rank
#575 out of 77,942
Registry
Ripe
Registered Country
GB flag GB
Registered Country Name
United Kingdom of Great Britain and Northern Ireland (the)
Registered Date
2002-09-19
Registration Last Change
2024-08-02
Receiving From

The list of active Autonomous Systems (ASs) which send traffic to that ASN.

ASN
Organisation
AS33891
DE flagCore-Backbone GmbH
AS4766
KR flagKorea Telecom
AS2914
US flagNTT America, Inc.
AS4230
BR flagCLARO S.A.
AS7713
ID flagTelekomunikasi Indonesia (PT)
Showing 5 of 74
Transit To

The list of active Autonomous Systems (ASs) which receive traffic from that ASN.

 

ASN
Organisation
AS72
US flagSchlumberger Limited
AS19812
US flagRADIANZ Americas, Inc.
AS45187
HK flagRackspace.com Hong Kong Limited
AS32906
US flagFACTORY MUTUAL INSURANCE COMPANY
AS36224
US flagHCL AMERICA INC
Showing 5 of 26
IPv4 Active Prefixes

This provides the list of IPv4 address space routes/prefixes currently announced on Border Gateway Protocol (BGP).

Prefix61.14.0.0/24
Range From61.14.0.0
Range To61.14.0.255
Prefix61.14.1.0/24
Range From61.14.1.0
Range To61.14.1.255
Prefix61.14.2.0/23
Range From61.14.2.0
Range To61.14.3.255
Prefix61.14.4.0/23
Range From61.14.4.0
Range To61.14.5.255
Prefix61.14.6.0/24
Range From61.14.6.0
Range To61.14.6.255
Showing 5 of 183
IPv6 Active Prefixes
Prefix2402:fb00::/37
Range From2402:fb00::
Range To2402:fb00:7ff:ffff:ffff:ffff:ffff:ffff
Prefix2402:fb00:800::/38
Range From2402:fb00:800::
Range To2402:fb00:bff:ffff:ffff:ffff:ffff:ffff
Prefix2402:fb00:c00::/39
Range From2402:fb00:c00::
Range To2402:fb00:dff:ffff:ffff:ffff:ffff:ffff
Prefix2402:fb00:e00::/40
Range From2402:fb00:e00::
Range To2402:fb00:eff:ffff:ffff:ffff:ffff:ffff
Prefix2402:fb00:f00::/40
Range From2402:fb00:f00::
Range To2402:fb00:fff:ffff:ffff:ffff:ffff:ffff
Showing 5 of 69
Autonomous System (AS) is a network (or collection of networks) that are all managed and supervised by a single entity or organisation. This tool provides a comprehensive ownership and connectivity report for any given AS number.