AS25511 ASN-NET21 JSC "RCS"

ASN-NET21 JSC "RCS" · registered in Russia

IPv4 addresses6,1443 prefixes · <0.001% of announced IPv4

Rank in Russia#733largest network in RU by IPv4 space, of 4,937 · 0.01% of RU

Rank worldwide#12,404of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryRussia4,993 ASNs registered there

Open AS25511 in ASN lookup Look up an IP in this network (91.103.196.1) All networks in Russia

IPv4 prefixes

All 3 prefixes, in address order.

91.103.196.0/22
185.108.0.0/22
217.12.240.0/20

Similar-sized networks in Russia

ASNNameIPv4 addresses

AS60042#730 OnTelecom-AS OnTelecom LLC6,144

AS8324#731 URC-AS South Ural State University6,144

AS24811#732 KES-AS Joint Stock Company Kuzbassenergosviaz6,144

AS31566#734 ASSKYNETWORK SkyNetwork Ltd.6,144

AS41566#735 TUSUR-AS Federal State Budget Educational Institution of Higher Professional Education "Tomsk State University of Control Systems and Radio Electronics"6,144

AS42998#736 CROSS-I Cross-I Ltd.6,144

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