The IP API The IP API
// ASN

AS210203

RETN-IT-AS, GB

Detailed information about the Autonomous System. Need another one? Look up a different ASN.

ASN
AS210203
Organization
UK-RETN-20080422
Description
RETN-IT-AS, GB
Country
GB
Registry (RIR)
RIPE
Created
2010-10-03
Updated
2025-07-02
IPv4 Prefixes
1
IPv6 Prefixes
0

IPv4 Prefixes

1 total
139.45.198.0/23

What is AS210203?

AS210203 is an Autonomous System Number (ASN) assigned to UK-RETN-20080422. An ASN identifies a network or group of IP prefixes operated under a common routing policy in the BGP protocol.

Looking for more ASN data?

Use our ASN Lookup Tool for real-time WHOIS queries, or explore our API documentation to integrate ASN data into your applications.