subnet.im

AS30937Walhalla Data Center Services SL

SpainRegistryRIPE NCC

As of 12th November 2026, AS30937 (Walhalla Data Center Services SL), a network registered in Spain with RIPE NCC, originates 9 IPv4 prefixes covering 4.1k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 17,386th-largest of the 80,775 networks we see originating IPv4, and the 243rd-largest of 937 in Spain. It is seen behind 4 upstream networks, most often AS3356 (Lumen (Level 3)) and AS3257 (GTT Communications Inc.), and in front of 1 downstream network. Every one of its announcements has a valid RPKI ROA, and none are RPKI-invalid. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

9

IPv6 prefixes

1

IPv4 addresses

4.1k

IPv6 /64s

268M

Upstream graph

The networks AS30937 is seen behind, one and two hops out, drawn from real AS paths.

AS30937Toward the internet core
Upstream graph for AS30937: 11 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS30937Walhalla Data Cen…This networkAS3257GTT Communication…AS3356Lumen (Level 3)AS12479Orange Espagne SAAS198479Nunsys SAAS6667Elisa OyjAS398465Rackdog LLCAS2914NTT America, Inc.AS3549Lumen (fka. Globa…AS5511Orange S.A.AS1299Arelion (fka. Tel…AS8220COLT

Networks observed one and two hops upstream of AS30937 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.

Neighbouring networks

11

adjacent networks

Upstreams
436%
Peers
655%
Downstreams
19%

Networks carrying this one's traffic toward the rest of the internet.

Upstreams of AS30937
NetworkCountryRelationshipPathsVantage pts
AS3356Lumen (Level 3)USPeer40280
AS3257GTT Communications Inc.USPeer21843
AS12479Orange Espagne SAESPeer9818
AS198479Nunsys SAESPeer7878

Prefixes

The largest blocks AS30937 originates, widest first.

Largest prefixes originated by AS30937
PrefixAddressesVisibility
185.4.244.0/221k78/78
45.140.10.0/2351278/78
45.141.124.0/2351278/78
45.141.126.0/2351278/78
45.157.200.0/2351278/78
80.68.155.0/2425678/78
91.232.71.0/2425678/78
188.208.218.0/2425678/78
193.16.216.0/2425678/78
2a01:a4c0::/36268M × /6463/64

Routing health

How AS30937's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.

RPKI origin validation

  • Valid100.0%10
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%10
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 9 prefixes

IPv6 — 1 prefixes

  • /36268M × /64100.0%1

Recent changes

Announcements that started or stopped since 13th Oct 2026.

No announcement by AS30937 started or stopped in this period.

Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.