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ASN Lookup Tool
AS21369 SEMA-UK-AS

Powered By:
ASN Extended Info API & BGP Active Prefixes API
ASN Details
ASN
AS21369
Organisation
Atos IT Services UK Ltd
Name
SEMA-UK-AS
Total IPv4 Addresses
7936
Total IPv4 Prefixes
31
Total IPv6 Prefixes
0
Total IPv4 Bogon Prefixes
0
Total IPv6 Bogon Prefixes
0
IPv4 Space Rank
#11,439 out of 77,322
Registry
Ripe
Registered Country
GB flag GB
Registered Country Name
United Kingdom of Great Britain and Northern Ireland (the)
Registered Date
2001-11-15
Registration Last Change
2023-01-03
Receiving From

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

ASN
Organisation
AS702
US flagVerizon Business
AS6461
US flagZayo Bandwidth
IPv4 Active Prefixes

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

Prefix157.203.6.0/24
Range From157.203.6.0
Range To157.203.6.255
Prefix157.203.7.0/24
Range From157.203.7.0
Range To157.203.7.255
Prefix157.203.36.0/24
Range From157.203.36.0
Range To157.203.36.255
Prefix157.203.37.0/24
Range From157.203.37.0
Range To157.203.37.255
Prefix157.203.40.0/24
Range From157.203.40.0
Range To157.203.40.255
Showing 5 of 31
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.