Autonomous system detail  ·  ES flag ES

AS766

Announced

Operated by RedIRIS, operated by Entidad Pública Empresarial Red.es, ES flag ES.

Summary

// analyst note
Actively-routed Spanish NREN ASN (not dormant). BGP-collector sources (bgp.he.net vs bgp.tools) disagree on exact live prefix counts, likely reflecting differing measurement windows/methodology, but agree closely on total IPv4 address space (~1.37M addresses). RIPEstat's own canonical announced_space.v4 count (31 prefixes) is used as ipv4_prefix_count over the disagreeing secondary collectors. CAIDA ASRank returns rank 1253 with a customer cone of 27 ASNs / 274 prefixes / 2,120,224 addresses, recorded here rather than left as the bgp.tools ordinal since CAIDA does return a value for this ASN. The RIPE RDAP registration event (2002-09-16) is recorded as allocated_date per task instruction — a first-party RIR fact, not an IEEE/OUI-style database artifact. bgp.he.net's 'announces bogons' flag lacks a populated supporting prefix table and is flagged as unconfirmed rather than asserted.
// security note
NEUTRAL/DATED: no notable public abuse signal found as of 2026-07-28; absent from Spamhaus ASN-DROP; no abuse/spam tags on bgp.tools; no NANOG mailing-list incident threads.
IPv4 prefixes
31
~1.4M addresses
IPv6 prefixes
3
announced
Peer networks
28
4 up · 20 down
IANA block
1-1876
Assigned by ARIN
[ 01 ] — Context

About this ASN.

Updated  ·  Confidence: High  ·  10 sources  ·  How this page is checked

AS766 is RedIRIS, Spain's national research and education network (NREN), and it is an actively routed ASN today — not a dormant or legacy holding in any operational sense. RIPE NCC's RDAP autnum record ties it to Entidad Pública Empresarial Red.es, a Spanish public corporate entity reporting to the Ministry of Economic Affairs and Digital Transformation, with a top-level registration event dated 2002-09-16 and a last-changed event of 2026-06-08.

RedIRIS connects more than 500 affiliated Spanish universities and public research centers to the pan-European GEANT network, and the operator holds ISO 9001, ISO 27001, Spain's ENS (Esquema Nacional de Seguridad), and AENOR Responsible AI certifications. Two independent BGP collectors disagree on the exact live prefix count — likely reflecting different measurement windows — but agree closely on total announced address space: roughly 1.37 million IPv4 addresses, on the order of 5,356 /24-equivalents.

Upstream transit runs through Cogent, Lumen/Level 3, GEANT, and Hurricane Electric, corroborated by both bgp.tools and bgp.he.net. RedIRIS peers at four IXPs — CATNIX and ESPANIX in Spain, plus GigaPix in Lisbon, Portugal — with roughly 48 to 55 observed BGP peers depending on source. PeeringDB lists an Open peering policy, though RedIRIS's own site does not publish a dedicated public peering-policy page.

RPKI posture looks generally healthy per third-party route-collector data: bgp.he.net counts 15 valid ROA origins (12 IPv4, 3 IPv6) and zero invalid. That figure comes from a BGP-collector snapshot rather than a direct query of an RIR Trust Anchor, so it should be read as directional rather than a certified compliance statement.

Abuse signal
No notable public abuse signal found for AS766 as of 2026-07-28 — absent from Spamhaus ASN-DROP, no abuse/spam tags on bgp.tools, and no incident threads in NANOG mailing-list archives.
Bogon anomaly
bgp.he.net displays an "AS766 announces bogons" note, but its own bogon-prefix table beneath that note is empty — an unconfirmed, possibly stale flag on a single secondary aggregator, not corroborated elsewhere.
RPKI coverage
ROA validity looks solid (15 valid, 0 invalid per bgp.he.net) but this is a route-collector snapshot, not an authoritative Trust Anchor query — treat as directional.
Talos lookup
Unknown — talosintelligence.com returned HTTP 403 on the reputation-lookup attempt (2026-07-28), so Talos's standing on AS766 could not be verified either way.
Operator
RedIRIS, operated by Entidad Pública Empresarial Red.es (Spanish public corporate entity, Ministry of Economic Affairs and Digital Transformation) [Confirmed] — https://rdap.db.ripe.net/autnum/766, https://www.rediris.es/rediris/
Country / RIR
ES, RIPE NCC [Confirmed] — https://rdap.db.ripe.net/autnum/766
Allocated
2002-09-16 (RIPE RDAP autnum top-level registration event); last changed 2026-06-08 [Confirmed] — https://rdap.db.ripe.net/autnum/766
Org status
active public-sector entity, part of Red.es under Spain's Ministry of Economic Affairs and Digital Transformation; ISO 9001, ISO 27001, ENS, AENOR Responsible AI certified [Confirmed] — https://www.rediris.es/rediris/
Contacts
abuse/security seguridad@rediris.es; admin contact Esther Robles (ER494-RIPE); technical/abuse RedIRIS Network Operation Center (IRIS1-RIPE) [Confirmed] — https://rdap.db.ripe.net/autnum/766

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal as of 2026-07-28; absent from Spamhaus ASN-DROP; no abuse tags on bgp.tools; no NANOG incident threads; bgp.he.net's "announces bogons" flag is unconfirmed (empty supporting table); Talos lookup Unknown (HTTP 403)

[Likely] — https://www.spamhaus.org/drop/asndrop/, https://bgp.tools/as/766, https://www.marc.info/?s=AS766&l=nanog

Network & routing

Network type
National Research and Education Network (NREN) for Spain; designated a Special Scientific and Technological Facility (ICTS) [Confirmed] — https://www.rediris.es/rediris/
Size
~1.37M IPv4 addresses (~5,356 /24-equivalents) — RIPEstat's canonical announced_space.v4 puts this at 31 prefixes / 1,371,648 addresses, visible to 329 of 330 RIS peers; secondary BGP collectors disagree on the exact live prefix count, likely reflecting differing measurement windows (30 current per bgp.tools vs 34 total origin / 139 route-table entries per bgp.he.net); IPv6: RIPEstat records 3 prefixes announced today (bgp.he.net's all-time view shows up to 23); CAIDA AS rank 1,253 with a customer cone of 27 ASNs / 274 prefixes / 2,120,224 addresses and asnDegree total 38 (customer 21, peer 13, provider 4) [Confirmed for RIPEstat/CAIDA figures; Likely for secondary-collector detail] — https://stat.ripe.net/AS766, https://stat.ripe.net/data/routing-status/data.json?resource=AS766, https://bgp.he.net/AS766, https://bgp.tools/as/766, https://api.asrank.caida.org/v2/restful/asns/766
Routing/peering
Upstreams Cogent, Lumen/Level 3, GEANT, Hurricane Electric; ~48–55 peers observed; present at CATNIX, ESPANIX (Madrid), GigaPix (Lisbon); PeeringDB policy Open [Confirmed for upstreams; Likely for peering policy] — https://bgp.tools/as/766, https://bgp.he.net/AS766, https://www.peeringdb.com/api/net?asn=766
RPKI
15 valid ROA origins (12 IPv4, 3 IPv6), 0 invalid, per bgp.he.net route-collector snapshot [Likely] — https://bgp.he.net/AS766
Notable usage
Serves 500+ affiliated Spanish universities and public research centers; connects Spain's academic/research community to GEANT [Confirmed] — https://www.rediris.es/rediris/
Related ASNs
none identified in this research pass [Unknown]
Analyst note
Encountered as an actively-routed Spanish NREN ASN, not dormant. BGP-collector sources disagree on precise live prefix counts (likely reflecting differing snapshot windows/methodology) but agree on total address space and core upstreams. RIPEstat's own canonical prefix count (31) is used as the authoritative ipv4_prefix_count over the disagreeing secondary collectors. CAIDA ASRank returns rank 1,253 with a customer cone of 27 ASNs / 274 prefixes / 2,120,224 addresses — recorded here rather than left as the bgp.tools ordinal, since CAIDA does return a value for this ASN. The bgp.he.net bogon note is flagged as unconfirmed rather than asserted as fact.
[ 02 ] — Announced prefixes

What this network routes.

34 prefixes total · as observed by RouteViews at 2026-09-20 · one collector view, not a global census
// IPv4 prefixes31
  1. 193.144.0.0/14/14
  2. 130.206.0.0/16/16
  3. 138.100.0.0/16/16
  4. 138.4.0.0/16/16
  5. 147.156.0.0/16/16
  6. 147.96.0.0/16/16
  7. 150.128.0.0/16/16
  8. 150.244.0.0/16/16
  9. 155.210.0.0/16/16
  10. 156.35.0.0/16/16
  11. 158.42.0.0/16/16
  12. 158.49.0.0/16/16
  13. 158.99.0.0/16/16
  14. 161.111.0.0/16/16
  15. 161.67.0.0/16/16
  16. 161.72.0.0/16/16
  17. 163.117.0.0/16/16
  18. 212.128.128.0/17/17
  19. 212.128.0.0/18/18
  20. 212.128.64.0/20/20
  21. 212.128.80.0/21/21
  22. 185.205.148.0/22/22
  23. 192.101.164.0/22/22
  24. 192.148.204.0/22/22
  25. 178.255.104.0/23/23
  26. 192.148.202.0/23/23
  27. 192.187.24.0/23/23
  28. 192.101.161.0/24/24
  29. 192.101.163.0/24/24
  30. 192.101.168.0/24/24
  31. 192.148.201.0/24/24
// IPv6 prefixes3
  1. 2001:720::/29/29
  2. 2001:720::/32/32
  3. 2001:678:508::/48/48
[ 03 ] — Notable peers & upstreams

Who it talks to.

28 observed neighbours
// Notable connections28 of 28 observed

Neighbours observed by RouteViews at 2026-09-20, lowest ASN first. Relationships are inferences from the CAIDA AS Relationships Dataset, 2026-08-01, and establish no commercial arrangement; a dash means the inference did not resolve.

ASNOperatorRole
AS174 Cogent Communications, LLC upstream
AS3356 Level 3 Parent, LLC (Lumen Technologies) upstream
AS20965 — upstream
AS21320 — upstream
AS288 European Space Agency (ESA) downstream
AS2114 — downstream
AS3303 — peer
AS6939 Hurricane Electric LLC peer
AS9002 — peer
AS13041 — downstream
AS15488 — downstream
AS15630 — downstream
AS25285 — downstream
AS25354 — downstream
AS34285 — downstream
AS34511 — downstream
AS43697 — downstream
AS44593 — downstream
AS49851 — downstream
AS197829 — downstream
AS198096 — downstream
AS198853 — downstream
AS198878 — downstream
AS200521 — downstream
AS205580 — downstream
AS208597 — downstream
AS210158 — downstream
AS214516 — —
Neighbours observed via public BGP collectors; not a complete peering list.