$ query “AS137” --type=asn → 1 result(s)

AS137 · ASGARR

Consortium GARR

AS137 is owned by Consortium GARR and is a mid-size transit provider, based in Italy since 2002. The system announces an impressive 2.8 million IPv4 addresses, including a /15, and supports IPv6. Most of its address space is geolocated to Italy.

  • Top 5% — Top 5% of all autonomous systems by reach and degree

Basic Information

Country
🇮🇹 Italy
Category
Hosting
Network Role
Mid-size Transit
Data Origin
Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
Registered
August 21, 2002
Last Changed
March 04, 2026
Last Seen
April 29, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
83 / 77
IPv6 Prefixes (raw / aggregated)
2 / 2
IPv4 Addresses
2 770 944
Largest IPv4 Prefix
/15 (131 072 addresses)
Largest IPv6 Prefix
/32
Geolocated Countries
🇮🇹 Italy (5 459 920 IPs)
Prefix Changed
April 21, 2026

Reputation

Reputation
Good — 9 flagged IPs out of 2 770 944 total (0.00%)

Connectivity Summary

Upstream Providers
4 upstreams providing transit
Peers
36 networks exchanging traffic without transit
Downstream Customers
15 downstreams buying transit
Unclassified
1 unclassified BGP neighbor
Degree
56 unique BGP neighbors
Reach
27 networks in customer cone

Upstream Providers (4)

  • AS174 — COGENT-174 (Tier-1 transit)
  • AS1299 — TWELVE99 (Tier-1 transit)
  • AS6762 — SEABONE-NET (Tier-1 transit)
  • AS20965 — GEANT

Prefix Lists

IPv4 Prefixes (83 total)

  • 147.162.0.0/15 (131 072 addresses (/15 prefix))
  • 193.204.0.0/15 (131 072 addresses (/15 prefix))
  • 155.185.0.0/16 (65 536 addresses (/16 prefix))
  • 90.147.0.0/16 (65 536 addresses (/16 prefix))
  • 130.251.0.0/16 (65 536 addresses (/16 prefix))
  • 131.114.0.0/16 (65 536 addresses (/16 prefix))
  • 131.154.0.0/16 (65 536 addresses (/16 prefix))
  • 131.175.0.0/16 (65 536 addresses (/16 prefix))
  • 137.204.0.0/16 (65 536 addresses (/16 prefix))
  • 138.41.0.0/16 (65 536 addresses (/16 prefix))
  • 140.105.0.0/16 (65 536 addresses (/16 prefix))
  • 140.164.0.0/16 (65 536 addresses (/16 prefix))
  • 141.108.0.0/16 (65 536 addresses (/16 prefix))
  • 141.250.0.0/16 (65 536 addresses (/16 prefix))
  • 143.225.0.0/16 (65 536 addresses (/16 prefix))
  • 146.48.0.0/16 (65 536 addresses (/16 prefix))
  • 147.122.0.0/16 (65 536 addresses (/16 prefix))
  • 155.253.0.0/16 (65 536 addresses (/16 prefix))
  • 149.132.0.0/16 (65 536 addresses (/16 prefix))
  • 149.139.0.0/16 (65 536 addresses (/16 prefix))
  • 150.145.0.0/16 (65 536 addresses (/16 prefix))
  • 150.146.0.0/16 (65 536 addresses (/16 prefix))
  • 150.178.0.0/16 (65 536 addresses (/16 prefix))
  • 150.217.0.0/16 (65 536 addresses (/16 prefix))
  • 151.97.0.0/16 (65 536 addresses (/16 prefix))
  • 151.100.0.0/16 (65 536 addresses (/16 prefix))
  • 130.192.0.0/16 (65 536 addresses (/16 prefix))
  • 192.167.0.0/16 (65 536 addresses (/16 prefix))
  • 130.136.0.0/16 (65 536 addresses (/16 prefix))
  • 156.148.0.0/16 (65 536 addresses (/16 prefix))
  • 157.27.0.0/16 (65 536 addresses (/16 prefix))
  • 157.138.0.0/16 (65 536 addresses (/16 prefix))
  • 158.110.0.0/16 (65 536 addresses (/16 prefix))
  • 159.149.0.0/16 (65 536 addresses (/16 prefix))
  • 160.78.0.0/16 (65 536 addresses (/16 prefix))
  • 160.80.0.0/16 (65 536 addresses (/16 prefix))
  • 160.97.0.0/16 (65 536 addresses (/16 prefix))
  • 156.14.0.0/16 (65 536 addresses (/16 prefix))
  • 193.206.0.0/16 (65 536 addresses (/16 prefix))
  • 212.189.128.0/17 (32 768 addresses (/17 prefix))
  • 130.186.0.0/19 (8 192 addresses (/19 prefix))
  • 192.107.64.0/19 (8 192 addresses (/19 prefix))
  • 194.119.192.0/19 (8 192 addresses (/19 prefix))
  • 192.84.128.0/20 (4 096 addresses (/20 prefix))
  • 192.135.16.0/20 (4 096 addresses (/20 prefix))
  • 192.107.56.0/21 (2 048 addresses (/21 prefix))
  • 192.135.8.0/21 (2 048 addresses (/21 prefix))
  • 192.84.144.0/21 (2 048 addresses (/21 prefix))
  • 185.191.180.0/22 (1 024 addresses (/22 prefix))
  • 192.107.52.0/22 (1 024 addresses (/22 prefix))
  • and 27 more

IPv6 Prefixes (2 total)

  • 2001:760::/32
  • 2a00:1620::/32