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ASN Lookup Tool
AS21369 SEMA-UK-AS

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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
7,424
Total IPv4 Prefixes
29
Total IPv6 Prefixes
0
Total IPv4 Bogon Prefixes
0
Total IPv6 Bogon Prefixes
0
IPv4 Space Rank
#11,787 out of 79,049
Registry
Ripe
Registered Country
GB flagGB
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
AS2856
GB flagBritish Telecommunications PLC
AS702
US flagVerizon Business
AS8220
GB flagCOLT Technology Services Group Limited
IPv4 Active Prefixes

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

PrefixRange FromRange To
157.203.6.0/24157.203.6.0157.203.6.255
157.203.7.0/24157.203.7.0157.203.7.255
157.203.36.0/24157.203.36.0157.203.36.255
157.203.37.0/24157.203.37.0157.203.37.255
157.203.40.0/24157.203.40.0157.203.40.255
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