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AS39738Telecom Castilla La Mancha SA

SpainRegistryRIPE NCC

As of 10th November 2026, AS39738 (Telecom Castilla La Mancha SA), a network registered in Spain with RIPE NCC, originates 2 IPv4 prefixes covering 16.4k addresses. By IPv4 address space that makes it the 8,092nd-largest of the 80,733 networks we see originating IPv4, and the 74th-largest of 936 in Spain. It is seen behind 3 upstream networks, most often AS174 (Cogent Communications, LLC) and AS8903 (LYNTIA NETWORKS S.A.). 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

2

IPv6 prefixes

0

IPv4 addresses

16.4k

IPv6 /64s

0

Upstream graph

The networks AS39738 is seen behind, one and two hops out, drawn from real AS paths.

AS39738Toward the internet core
Upstream graph for AS39738: 8 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS39738Telecom Castilla …This networkAS174Cogent Communicat…AS8903LYNTIA NETWORKS S…AS202766LYNTIA NETWORKS S…AS1299Arelion (fka. Tel…AS151326DCConnect Communi…AS3257GTT Communication…AS6939Hurricane Electri…AS15704XTRA TELECOM S.A.

Networks observed one and two hops upstream of AS39738 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

8

adjacent networks

Upstreams
338%
Peers
563%
Downstreams
00%

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

Upstreams of AS39738
NetworkCountryRelationshipPathsVantage pts
AS174Cogent Communications, LLCUSPeer8561
AS8903LYNTIA NETWORKS S.A.ESPeer6350
AS202766LYNTIA NETWORKS S.A.ESPeer21

Prefixes

The largest blocks AS39738 originates, widest first.

Largest prefixes originated by AS39738
PrefixAddressesVisibility
82.86.0.0/198.2k75/76
82.86.32.0/198.2k75/76

Routing health

How AS39738'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%2
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%2
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 2 prefixes

Recent changes

Announcements that started or stopped since 11th Oct 2026.

No announcement by AS39738 started or stopped in this period.

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