asn.dev

Autonomous system

AS137 ASGARR Consortium GARR

Unclassified RIPE

IPv4 addresses 2.75M 87 prefixes
IPv6 prefixes 2 counted as prefixes, not addresses
Countries 1 mostly IT
Exchanges 3 recorded by PCH
Upstreams 13 13 downstream
Flagged prefixes 0 none

Summary

GARR (Consortium GARR)

Italy · AI-generated

research education nren

GARR is Italy's National Research and Education Network (NREN) — the high-speed backbone connecting the country's universities, research institutes, libraries, and cultural institutions.

What it's used for

  • Interconnecting Italian academic and research sites and linking them to the pan-European research network GÉANT and the global R&E community.
  • Carrying data-intensive science traffic (physics, genomics, supercomputing) that would swamp a commercial consumer ISP.

Notable

  • Like Internet2 (US), JANET (UK), or DFN (Germany), GARR is a non-commercial network funded to serve education and research, not the general public.
  • Operates its own dark-fibre footprint across Italy.

Interesting

  • NRENs such as GARR were among the earliest high-bandwidth networks and often pilot next-generation networking years before commercial ISPs adopt it.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.

Interconnection

Peering at a glance

Full topology · Graph

Internet exchanges

Recorded at 3 exchanges in 1 country, largest first.

ExchangeLocationTheir address
Milan Internet ExchangeMilan, Italy217.29.66.39
Roma Internet Exchange PointRome, Italy193.201.28.15
Torino Piemonte Exchange PointTorino, Italy194.116.96.25

Transit providers

13 upstream, 13 downstream and 38 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS174Cogent Communications, LLC2,135
AS6762TELECOM ITALIA SPARKLE S.p.A.1,403
AS6461Zayo Bandwidth573
AS20965GEANT Vereniging500
AS3303Swisscom (Schweiz) AG161
AS21320GEANT Vereniging87
AS24482SG.GS84
AS31543myNet GmbH83

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-14, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.

Address space

Summary

Shape and geography

IPv4 87 prefixes · 2.75M addresses IPv6 2 prefixes

CountryNamePrefixes
ITItaly89

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS137
Registry name
ASGARR
Registrant
GARR-LIR
Abuse contact
cert@garr.it
Registered
2002-08-21
Last changed
2023-10-27
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
80% valid · 68 valid, 17 with no ROA
ROAs
68 authorising AS137
ASPA
no ASPA record
IRR
100% registered · 85 of 85 announcements
Route objects
87 naming AS137

Reputation

Classification and threat

Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.

Spamhaus DROP

Not on ASN-DROP The network as a whole is not listed.

No DROP prefixes None of its announced space is on the DROP prefix list.

Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 442 networks and 1,773 prefixes, as published 2026-10-13. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.

FBI IC3

No IC3 indicators Nothing from the FBI IC3 feed.

IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.

Elsewhere

Cross-check