AS203909 MAINFRAME-NET Christian Svensson

MAINFRAME-NET Christian Svensson · registered in Sweden

IPv4 addresses2561 prefixes · <0.001% of announced IPv4

Rank in Sweden#521largest network in SE by IPv4 space, of 621 · <0.01% of SE

Rank worldwide#62,143of 79,396 networks with IPv4

IPv61 x /481 prefixes

CountrySweden650 ASNs registered there

Open AS203909 in ASN lookup Look up an IP in this network (193.228.143.1) All networks in Sweden

IPv4 prefixes

All 1 prefix, in address order.

193.228.143.0/24

IPv6 prefixes

All 1 prefix.

2001:678:d88::/48

Similar-sized networks in Sweden

ASNNameIPv4 addresses

AS202218#518 INTERNETSTIFTELSEN_ANYCAST Stiftelsen for Internetinfrastruktur256

AS202687#519 MAINLOOP-ANYCAST-AS Mainloop AB256

AS203383#520 STENA-REDERI-ASN Stena Rederi AB256

AS204074#522 NMU-AS Nordisk Media Utveckling AB256

AS205966#523 CLEARMINDS Clearminds AB256

AS206884#524 FI-AS Finansinspektionen256

IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources