AS12521 — NOVA_INTERNET_AS12521 Madrid - Spain

AS12521 announces 7 IPv4 prefixes covering 6,656 addresses and 0 IPv6 prefixes.

About this network

Twelve fragments of Spanish address space, three reverse-DNS brands, and a netname that says the country twice.

What it's used for

• Internet access and hosting. 6,656 addresses in twelve IPv4 prefixes, three observed BGP neighbours, and no IPv6 announced.

Notable

• Six blocks share one netname, ES-NOVA-990623, registered to Nova Internet S.L. Two more are ES-NOVA-20191003, twenty years later.
• Two blocks belong to a different company, ARSENET Servicios en Internet S.L., under the netname ES-ES-20120828 — the country code where the organisation name should be.
• Most of the inventory is scattered through 212.85.32.0 to 212.85.51.255 in /22s, /23s and a /24, rather than announced as one range.
• Three different domains answer in reverse: 212.85.33.126.inproes.com, 212.85.35.126.nova.es, and ppp-128.34.85.212.marblenet.es.

Interesting

• Two of those reverse names spell the address forwards and the third spells it backwards. All three are generated, and each generator was written by somebody with a different idea of which end to start from.
• ES-ES is a form filled in by rote. The convention is country then organisation, and whoever typed this one put the country in both fields — a small clerical fact that has been in the registry since 2012 because nothing ever forces a netname to be re-read.
• Three brands answering inside one AS, plus a second company's blocks alongside, is a provider assembled from other providers. The addresses remember every acquisition even when the marketing does not.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 5.199.224.0/22
• 5.199.228.0/23
• 5.199.230.0/24
• 91.195.73.0/24
• 91.195.103.0/24
• 212.85.32.0/20
• 212.85.50.0/24

Upstream networks

• AS15704 XTRA TELECOM S.A.
• AS3262 SAREnet, S.A.

Downstream networks

• AS39398 ARSENET SERVICIOS EN INTERNET S.L.

Adjacent networks

• AS15704 XTRA TELECOM S.A.
• AS3262 SAREnet, S.A.
• AS39398 ARSENET SERVICIOS EN INTERNET S.L.