The IP API The IP API
// ASN

AS203909

MAINFRAME-NET - Christian Svensson, SE

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

ASN
AS203909
Organization
Mainframe Networks
Description
MAINFRAME-NET - Christian Svensson, SE
Registry (RIR)
RIPE
Created
2024-08-08
Updated
2025-11-11
IPv4 Prefixes
1
IPv6 Prefixes
1

IPv4 Prefixes

1 total
193.228.143.0/24

IPv6 Prefixes

1 total
2001:678:d88::/48

What is AS203909?

AS203909 is an Autonomous System Number (ASN) assigned to Mainframe Networks. 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.