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AS203936AVATEL TELECOM, SA

SpainRegistryRIPE NCC

As of 27th September 2026, AS203936 (AVATEL TELECOM, SA), a network registered in Spain with RIPE NCC, originates 11 IPv4 prefixes covering 4.6k addresses. By IPv4 address space that makes it the 16,157th-largest of the 79,525 networks we see originating IPv4, and the 218th-largest of 926 in Spain. It is seen behind 3 upstream networks, most often AS34696 (MISMELINK NETWORKS, SL) and AS200845 (AVATEL TELECOM, SA), and in front of 4 downstream networks. Every one of its announcements has a valid RPKI ROA, and none are RPKI-invalid. 91% of its routes reach at least 90% of full-feed peers, and 1 prefix is also originated by another network.

At a glance

IPv4 prefixes

11

IPv6 prefixes

0

IPv4 addresses

4.6k

IPv6 /64s

0

Upstream graph

The networks AS203936 is seen behind, one and two hops out, drawn from real AS paths.

AS203936Toward the internet core
Upstream graph for AS203936: 7 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS203936AVATEL TELECOM, SAThis networkAS12956Telxius (Telefoni…AS34696MISMELINK NETWORK…AS200845AVATEL TELECOM, SAAS32590Valve CorporationAS1299Arelion (fka. Tel…AS6204TMRC GROUP SRLAS174Cogent Communicat…

Networks observed one and two hops upstream of AS203936 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

14

adjacent networks

Upstreams
321%
Peers
750%
Downstreams
429%

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

Upstreams of AS203936
NetworkCountryRelationshipPathsVantage pts
AS34696MISMELINK NETWORKS, SLESPeer79152
AS200845AVATEL TELECOM, SAESPeer30728
AS12956Telxius (Telefonica Global)ESPeer22921

Prefixes

The largest blocks AS203936 originates, widest first.

Largest prefixes originated by AS203936
PrefixAddressesVisibility
185.118.188.0/221k81/81
185.253.144.0/221k80/81
185.118.190.0/2351281/81
89.40.238.0/2425642/81
185.118.188.0/2425681/81
185.118.189.0/2425681/81
185.253.145.0/2425680/81
185.253.146.0/2425680/81
193.39.92.0/2425680/81
193.39.93.0/2425680/81

Routing health

How AS203936'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%11
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more90.9%10
  • Partially propagated40% to 90%9.1%1
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 11 prefixes

Recent changes

Announcements that started or stopped since 28th Aug 2026.

No announcement by AS203936 started or stopped in this period.

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