AS206404 Altercom21 ALTERCOM-21 SL

Altercom21 ALTERCOM-21 SL · registered in Spain

IPv4 addresses5122 prefixes · <0.001% of announced IPv4

Rank in Spain#741largest network in ES by IPv4 space, of 926 · <0.01% of ES

Rank worldwide#56,695of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountrySpain954 ASNs registered there

Open AS206404 in ASN lookup Look up an IP in this network (185.187.68.1) All networks in Spain

IPv4 prefixes

All 2 prefixes, in address order.

185.187.68.0/24
185.187.71.0/24

Similar-sized networks in Spain

ASNNameIPv4 addresses

AS204774#738 SISTEL SISTEL ALMANZORA S.L.512

AS204884#739 FUNDACION-PARQUE-UVA Fundacion Universidad de Valladolid512

AS205113#740 obs OLYMPIC BROADCASTING SERVICES SL512

AS206524#742 Telconet TELCONET SISTEMAS S.L.512

AS207030#743 AS1607 AVATEL TELECOM, SA512

AS207040#744 ASN-OBWAN OBWAN NETWORK AND SERVICES S.L.512

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