Autonomous System

AS137

Consortium GARR

Consortium GARR Italy 🌐 garr.it

Announced IPs

2,745,344

CIDR prefixes

ASN

AS137

Reputation · trust score

A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.

57/100

Caution

How this score is built

Baseline (neutral) 65
Active-threat / abuse risk −12
Enterprise allocation +4
Trust score 57 / 100

Experimental · trust-vectors model v1.3.0 — a transparent heuristic, not a definitive verdict. How it works →

⚠ 2 MOAS prefixes — multiple origin ASNs detected

All MOAS anomalies →

A previously stable prefix originated by AS137 is now also announced by another ASN (MOAS — Multiple-Origin AS), detected from our RIPE RIS collectors. Often benign (anycast, multi-homing, or a recent transfer) — but it can signal a route leak or prefix hijack, so it's worth inspecting.

Prefix	Origin ASNs	Last detected (UTC)
130.186.0.0/19	AS137, AS198949	2026-10-27 07:51:35
131.175.192.0/18	AS137, AS198949	2026-10-27 07:51:35

Network profile

Source: PeeringDB →

Network type Educational/Research

Traffic level 100-200Gbps

Geographic scope Europe

Traffic ratio Balanced

Peering policy Open

IRR record RIPE::AS-GARR RIPE::AS-GARRTOGEANT

Present at 5 internet exchanges: TOP-IX: Public Peering VLAN, Namex Rome: VLAN Peering, MIX-IT, TIX, VSIX: Primary

Website ↗

Web3 footprint

AS137 hosts 1 observed decentralized-network node across 1 network. It’s a neutral signal — it does not affect the reputation score. See the full web3 node map.

Ξ Ethereum 1

Top CIDR ranges

CIDR	IPs	PTR Density	Organization	Country	State	City
147.162.0.0/15	131.1K	6.5%	Consortium GARR	IT	Sicily	Palermo
193.204.0.0/15	131.1K	25.0%	Consortium GARR	IT	Lombardy	Milan
90.147.0.0/16	65.5K	17.0%	Consortium GARR	IT	Lazio	Rome
130.136.0.0/16	65.5K	4.6%	Consortium GARR	IT	—	—
130.192.0.0/16	65.5K	13.9%	Consortium GARR	IT	Piedmont	Turin
130.251.0.0/16	65.5K	13.8%	Consortium GARR	IT	Liguria	Genoa
131.114.0.0/16	65.5K	22.6%	Consortium GARR	IT	Tuscany	Pisa
131.154.0.0/16	65.5K	11.6%	Consortium GARR	IT	Emilia-Romagna	Bologna
137.204.0.0/16	65.5K	7.4%	Consortium GARR	IT	Emilia-Romagna	Bologna
138.41.0.0/16	65.5K	0.0%	Consortium GARR	IT	Apulia	Martano
140.105.0.0/16	65.5K	28.7%	Consortium GARR	IT	Friuli Venezia Giulia	Trieste
140.164.0.0/16	65.5K	1.6%	Consortium GARR	IT	Campania	Naples
141.108.0.0/16	65.5K	9.2%	Consortium GARR	IT	Lazio	Rome
141.250.0.0/16	65.5K	24.9%	Consortium GARR	IT	Umbria	Perugia
143.225.0.0/16	65.5K	3.3%	Consortium GARR	IT	Campania	Volla
146.48.0.0/16	65.5K	12.0%	Consortium GARR	IT	Tuscany	San Giuliano Terme
147.122.0.0/16	65.5K	40.2%	Consortium GARR	IT	Friuli Venezia Giulia	Trieste
149.132.0.0/16	65.5K	16.1%	Consortium GARR	IT	Lombardy	Milan
149.139.0.0/16	65.5K	2.0%	Consortium GARR	IT	—	—
150.145.0.0/16	65.5K	7.2%	Consortium GARR	IT	Apulia	Bari
150.146.0.0/16	65.5K	8.4%	Consortium GARR	IT	Lazio	Rome
150.178.0.0/16	65.5K	1.7%	Consortium GARR	IT	Trentino-Alto Adige	San Michele all'Adige
150.217.0.0/16	65.5K	27.7%	Consortium GARR	IT	Tuscany	Florence
151.97.0.0/16	65.5K	15.4%	Consortium GARR	IT	Sicily	Biancavilla
151.100.0.0/16	65.5K	51.6%	Consortium GARR	IT	Lazio	Rome
155.185.0.0/16	65.5K	50.0%	Consortium GARR	IT	Emilia-Romagna	Vignola
155.253.0.0/16	65.5K	1.5%	Consortium GARR	IT	Lombardy	Oggiono
156.14.0.0/16	65.5K	0.1%	Consortium GARR	IT	—	—
156.148.0.0/16	65.5K	0.6%	Consortium GARR	IT	—	—
157.27.0.0/16	65.5K	0.3%	Consortium GARR	IT	Veneto	Verona
157.138.0.0/16	65.5K	9.7%	Consortium GARR	IT	Veneto	Venice
158.110.0.0/16	65.5K	1.7%	Consortium GARR	IT	Friuli Venezia Giulia	Udine
159.149.0.0/16	65.5K	54.5%	Consortium GARR	IT	Lombardy	Milan
160.78.0.0/16	65.5K	10.9%	Consortium GARR	IT	Emilia-Romagna	Parma
160.80.0.0/16	65.5K	16.1%	Consortium GARR	IT	Lazio	Rome
160.97.0.0/16	65.5K	2.9%	Consortium GARR	IT	Calabria	Rende
192.167.0.0/16	65.5K	28.2%	Consortium GARR	IT	Lombardy	Brescia
193.206.0.0/16	65.5K	30.6%	Consortium GARR	IT	Lazio	Rome
193.206.0.0/17	32.8K	31.5%	Consortium GARR	IT	Lazio	Rome
212.189.128.0/17	32.8K	29.5%	Consortium GARR	IT	Apulia	Casamassima
131.175.64.0/18	16.4K	13.9%	Consortium GARR	IT	Lombardy	Milan
131.175.128.0/18	16.4K	12.0%	Consortium GARR	IT	Lombardy	Milan
193.206.192.0/18	16.4K	12.1%	Consortium GARR	IT	Apulia	Foggia
131.175.32.0/19	8.2K	4.3%	Consortium GARR	IT	Lombardy	Milan
192.107.64.0/19	8.2K	34.5%	Consortium GARR	IT	Lazio	Rome
193.206.160.0/19	8.2K	49.8%	Consortium GARR	IT	Lazio	Viterbo
194.119.192.0/19	8.2K	8.2%	Consortium GARR	IT	—	—
131.175.16.0/20	4.1K	5.1%	Consortium GARR	IT	Lombardy	Bergamo
192.84.128.0/20	4.1K	55.7%	Consortium GARR	IT	—	—
192.135.16.0/20	4.1K	48.3%	Consortium GARR	IT	Veneto	Padua
193.206.144.0/20	4.1K	55.8%	Consortium GARR	IT	Lazio	Viterbo
131.175.8.0/21	2.0K	6.7%	Consortium GARR	IT	—	—
192.84.144.0/21	2.0K	43.8%	Consortium GARR	IT	Sicily	Catania
192.107.56.0/21	2.0K	24.4%	Consortium GARR	IT	—	—
192.135.8.0/21	2.0K	44.3%	Consortium GARR	IT	—	—
131.175.4.0/22	1.0K	0.0%	Consortium GARR	IT	—	—
185.191.180.0/22	1.0K	65.1%	Consortium GARR	IT	—	—
192.84.152.0/22	1.0K	44.3%	Consortium GARR	IT	Abruzzo	L’Aquila
192.107.52.0/22	1.0K	39.9%	Consortium GARR	IT	Lazio	Guidonia Montecelio
192.107.96.0/22	1.0K	23.3%	Consortium GARR	IT	—	—
192.135.32.0/22	1.0K	42.0%	Consortium GARR	IT	—	—
193.206.128.0/22	1.0K	47.9%	Consortium GARR	IT	—	—
192.135.36.0/23	512	3.3%	Consortium GARR	IT	—	—
192.150.194.0/23	512	0.6%	Consortium GARR	IT	—	—
193.43.18.0/23	512	2.0%	Consortium GARR	IT	—	—
193.43.116.0/23	512	0.4%	Consortium GARR	IT	—	—
193.206.134.0/23	512	19.5%	Consortium GARR	IT	—	—
193.206.136.0/23	512	49.4%	Consortium GARR	IT	Lazio	Viterbo
193.206.140.0/23	512	24.0%	Consortium GARR	IT	Lazio	Viterbo
192.41.218.0/24	256	0.0%	Consortium GARR	IT	—	—
192.55.101.0/24	256	0.0%	Consortium GARR	IT	—	—
192.84.127.0/24	256	2.7%	Consortium GARR	IT	—	—
192.84.156.0/24	256	3.5%	Consortium GARR	IT	—	—
192.106.234.0/24	256	5.9%	Consortium GARR	IT	—	—
192.107.51.0/24	256	18.4%	Consortium GARR	IT	—	—
192.107.100.0/24	256	38.7%	Consortium GARR	IT	—	—
192.132.34.0/24	256	53.9%	Consortium GARR	IT	—	—
192.133.28.0/24	256	7.4%	Consortium GARR	IT	Campania	Amorosi
192.135.165.0/24	256	0.0%	Consortium GARR	IT	—	—
192.146.242.0/24	256	41.0%	Consortium GARR	IT	Sardinia	Cagliari
192.148.193.0/24	256	93.4%	Consortium GARR	IT	—	—
192.150.196.0/24	256	3.5%	Consortium GARR	IT	—	—
192.156.213.0/24	256	17.2%	Consortium GARR	IT	—	—
192.160.156.0/24	256	4.3%	Consortium GARR	IT	Sardinia	Cagliari
193.42.139.0/24	256	15.6%	Consortium GARR	IT	—	—
193.43.97.0/24	256	6.3%	Consortium GARR	IT	—	—
193.43.101.0/24	256	0.0%	Consortium GARR	IT	Campania	Castellammare di Stabia
193.43.109.0/24	256	0.0%	Consortium GARR	IT	—	—
193.43.141.0/24	256	25.8%	Consortium GARR	IT	Abruzzo	Giulianova
193.206.133.0/24	256	2.0%	Consortium GARR	IT	—	—
193.206.139.0/24	256	10.9%	Consortium GARR	IT	Lazio	Viterbo
193.206.142.0/24	256	44.5%	Consortium GARR	IT	—	—
193.206.132.128/25	128	51.6%	Consortium GARR	IT	—	—
193.206.138.128/25	128	39.8%	Consortium GARR	IT	—	—
193.206.143.0/25	128	23.4%	Consortium GARR	IT	—	—
193.206.132.0/26	64	51.6%	Consortium GARR	IT	—	—
193.206.138.0/26	64	40.6%	Consortium GARR	IT	—	—
193.206.143.192/26	64	23.4%	Consortium GARR	IT	—	—
193.206.132.96/27	32	53.1%	Consortium GARR	IT	—	—
193.206.138.96/27	32	40.6%	Consortium GARR	IT	—	—

BGP Announced Prefixes

Live BGP anomalies →

Prefixes AS137 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.

Prefix	Announcement samples	Last seen
155.185.0.0/16	337,588	2026-10-27 07:37:28
192.135.35.0/24	40,965	2026-10-27 07:37:28
192.135.37.0/24	36,542	2026-10-27 07:37:28
192.106.234.0/24	29,719	2026-10-27 07:37:28
156.148.0.0/16	25,698	2026-10-27 07:37:28
192.41.218.0/24	24,929	2026-10-27 07:37:28
192.156.213.0/24	23,900	2026-10-27 07:37:28
149.132.0.0/16	22,565	2026-10-27 07:37:37
151.97.0.0/16	22,074	2026-10-27 07:37:28
157.27.0.0/16	21,941	2026-10-27 07:37:28
193.43.117.0/24	21,905	2026-10-27 07:37:28
160.97.0.0/16	21,785	2026-10-27 07:37:28
193.43.18.0/23	21,611	2026-10-27 07:37:28
130.192.0.0/16	21,558	2026-10-27 07:37:34
193.43.101.0/24	21,233	2026-10-27 07:37:28
150.217.0.0/16	20,690	2026-10-27 07:37:28
160.80.0.0/16	20,439	2026-10-27 07:37:28
141.250.0.0/16	20,163	2026-10-27 07:37:28
192.133.28.0/24	19,739	2026-10-27 07:37:28
143.225.0.0/16	19,693	2026-10-27 07:37:28
157.138.0.0/16	19,618	2026-10-27 07:37:34
150.178.0.0/16	19,562	2026-10-27 07:37:28
192.146.242.0/24	19,542	2026-10-27 07:37:28
192.160.156.0/24	19,511	2026-10-27 07:37:28
192.135.34.0/24	19,395	2026-10-27 07:37:28
192.132.34.0/24	19,372	2026-10-27 07:37:28
192.135.165.0/24	19,362	2026-10-27 07:37:28
192.55.101.0/24	19,345	2026-10-27 07:37:28
131.175.0.0/16	19,313	2026-10-27 07:37:34
140.164.0.0/16	19,299	2026-10-27 07:37:34
155.253.0.0/16	19,286	2026-10-27 07:37:34
150.145.0.0/16	19,254	2026-10-27 07:37:34
193.42.139.0/24	19,254	2026-10-27 07:37:28
192.107.100.0/24	19,238	2026-10-27 07:37:28
146.48.0.0/16	19,198	2026-10-27 07:37:34
194.119.192.0/19	19,132	2026-10-27 07:37:34
147.162.0.0/15	19,114	2026-10-27 07:37:34
192.107.52.0/22	19,044	2026-10-27 07:37:37
192.107.51.0/24	18,965	2026-10-27 07:37:28
193.43.141.0/24	18,889	2026-10-27 07:37:28
131.114.0.0/16	18,781	2026-10-27 07:37:28
130.251.0.0/16	18,778	2026-10-27 07:37:28
192.135.36.0/24	18,551	2026-10-27 07:37:28
192.84.156.0/24	18,415	2026-10-27 07:37:28
192.148.193.0/24	18,411	2026-10-27 07:37:28
158.110.0.0/16	18,074	2026-10-27 07:37:28
193.43.97.0/24	17,904	2026-10-27 07:37:28
156.14.0.0/16	17,478	2026-10-27 07:37:28
149.139.0.0/16	17,243	2026-10-27 07:37:28
159.149.0.0/16	17,196	2026-10-27 07:37:28

Showing top 50 of 84 announced prefixes by sample volume.

Frequently Asked Questions

What is AS137?

AS137 is an Autonomous System Number assigned to Consortium GARR. An ASN identifies a network that controls a specific set of IP addresses and determines how traffic is routed across the internet via BGP (Border Gateway Protocol).

How many IP addresses does AS137 announce?

AS137 announces 2.75M IPv4 addresses distributed across 81 routed CIDR prefixes. The network is registered in Italy.

Who operates AS137?

AS137 is operated by Consortium GARR. The organization is based in Italy. You can view all IP ranges and related ASNs on the organization page.

What country is AS137 registered in?

AS137 is registered in Italy. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.

Last updated: 2026-10-27 07:54:05 UTC