Autonomous System

AS137

Consortium GARR

Consortium GARR Italy 🌐 garr.it

Announced IPs

2,761,728

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 v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →

⚠ 1 MOAS prefix — 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)
131.175.192.0/18	AS137, AS198949	2026-09-10 11:55:45

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 ↗

AS137 — global IP footprint

Cities where AS137 has measurable IPv4 allocation. Click any dot to open that city's page. Size and color scale with IP count.

View on 3D globe →

Top CIDR ranges

CIDR	IPs	PTR Density	Organization	Country	State	City
147.162.0.0/15	131.1K	4.0%	Consortium GARR	IT	Sicily	Palermo
193.204.0.0/15	131.1K	24.6%	Consortium GARR	IT	Lazio	Rome
90.147.0.0/16	65.5K	0.0%	Consortium GARR	IT	Campania	Torre del Greco
130.136.0.0/16	65.5K	4.6%	Consortium GARR	IT	—	—
130.192.0.0/16	65.5K	14.0%	Consortium GARR	IT	Piedmont	Turin
130.251.0.0/16	65.5K	12.9%	Consortium GARR	IT	Liguria	Genoa
131.114.0.0/16	65.5K	22.7%	Consortium GARR	IT	Tuscany	Pisa
131.154.0.0/16	65.5K	11.5%	Consortium GARR	IT	Emilia-Romagna	Bologna
137.204.0.0/16	65.5K	6.8%	Consortium GARR	IT	Emilia-Romagna	Bologna
138.41.0.0/16	65.5K	0.0%	Consortium GARR	IT	Campania	Cava de' Tirreni
140.105.0.0/16	65.5K	24.7%	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	8.5%	Consortium GARR	IT	Lazio	Rome
141.250.0.0/16	65.5K	24.6%	Consortium GARR	IT	Umbria	Perugia
143.225.0.0/16	65.5K	3.1%	Consortium GARR	IT	Campania	Naples
146.48.0.0/16	65.5K	12.2%	Consortium GARR	IT	Tuscany	Pisa
147.122.0.0/16	65.5K	36.6%	Consortium GARR	IT	Friuli Venezia Giulia	Trieste
149.132.0.0/16	65.5K	15.7%	Consortium GARR	IT	Lombardy	Milan
149.139.0.0/16	65.5K	1.7%	Consortium GARR	IT	Tuscany	Florence
150.145.0.0/16	65.5K	6.5%	Consortium GARR	IT	Piedmont	Turin
150.146.0.0/16	65.5K	8.4%	Consortium GARR	IT	Lazio	Rome
150.178.0.0/16	65.5K	1.6%	Consortium GARR	IT	Trentino-Alto Adige	Trento
150.217.0.0/16	65.5K	26.7%	Consortium GARR	IT	Tuscany	Florence
151.97.0.0/16	65.5K	13.5%	Consortium GARR	IT	Sicily	Tremestieri Etneo
151.100.0.0/16	65.5K	51.9%	Consortium GARR	IT	Lazio	Rome
155.185.0.0/16	65.5K	47.1%	Consortium GARR	IT	Emilia-Romagna	Modena
155.253.0.0/16	65.5K	1.5%	Consortium GARR	IT	Lombardy	Lecco
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	0.2%	Consortium GARR	IT	Veneto	Verona
157.138.0.0/16	65.5K	9.7%	Consortium GARR	IT	Veneto	Mestre
158.110.0.0/16	65.5K	1.6%	Consortium GARR	IT	Friuli Venezia Giulia	Udine
159.149.0.0/16	65.5K	39.7%	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	16.2%	Consortium GARR	IT	Lazio	Cave
160.97.0.0/16	65.5K	2.6%	Consortium GARR	IT	Calabria	Rende
192.167.0.0/16	65.5K	28.5%	Consortium GARR	IT	Sardinia	Cagliari
193.205.0.0/16	65.5K	0.0%	Consortium GARR	IT	Lombardy	Milan
193.206.0.0/16	65.5K	30.2%	Consortium GARR	IT	Piedmont	Tornaco
131.175.128.0/17	32.8K	5.9%	Consortium GARR	IT	Lombardy	Milan
193.204.0.0/17	32.8K	0.0%	Consortium GARR	IT	Lazio	Rome
193.206.0.0/17	32.8K	0.0%	Consortium GARR	IT	Piedmont	Tornaco
212.189.128.0/17	32.8K	27.7%	Consortium GARR	IT	Apulia	Valenzano
131.175.64.0/18	16.4K	10.7%	Consortium GARR	IT	Lombardy	Milan
131.175.128.0/18	16.4K	9.7%	Consortium GARR	IT	Lombardy	Milan
193.204.128.0/18	16.4K	0.0%	Consortium GARR	IT	Abruzzo	L’Aquila
193.206.192.0/18	16.4K	0.0%	Consortium GARR	IT	Apulia	Foggia
131.175.32.0/19	8.2K	3.5%	Consortium GARR	IT	Lombardy	Milan
192.107.64.0/19	8.2K	37.8%	Consortium GARR	IT	Lazio	Rome
193.204.224.0/19	8.2K	0.0%	Consortium GARR	IT	Calabria	Reggio Calabria
193.206.160.0/19	8.2K	0.0%	Consortium GARR	IT	Lombardy	Longone al Segrino
194.119.192.0/19	8.2K	7.9%	Consortium GARR	IT	—	—
131.175.16.0/20	4.1K	4.2%	Consortium GARR	IT	Lombardy	Milan
192.84.128.0/20	4.1K	52.2%	Consortium GARR	IT	—	—
192.135.16.0/20	4.1K	42.7%	Consortium GARR	IT	Abruzzo	L’Aquila
193.204.192.0/20	4.1K	0.0%	Consortium GARR	IT	—	—
193.206.144.0/20	4.1K	0.0%	Consortium GARR	IT	Lombardy	Belgioioso
131.175.8.0/21	2.0K	5.2%	Consortium GARR	IT	—	—
192.84.144.0/21	2.0K	43.2%	Consortium GARR	IT	Sicily	Catania
192.107.56.0/21	2.0K	25.2%	Consortium GARR	IT	—	—
192.135.8.0/21	2.0K	43.9%	Consortium GARR	IT	—	—
193.204.208.0/21	2.0K	0.0%	Consortium GARR	IT	—	—
193.206.136.0/21	2.0K	0.0%	Consortium GARR	IT	Lombardy	Belgioioso
131.175.4.0/22	1.0K	0.0%	Consortium GARR	IT	—	—
185.191.180.0/22	1.0K	71.8%	Consortium GARR	IT	—	—
192.84.152.0/22	1.0K	44.2%	Consortium GARR	IT	Abruzzo	L’Aquila
192.107.52.0/22	1.0K	43.8%	Consortium GARR	IT	Lazio	Guidonia Montecelio
192.107.96.0/22	1.0K	27.5%	Consortium GARR	IT	—	—
192.135.32.0/22	1.0K	42.1%	Consortium GARR	IT	—	—
193.204.220.0/22	1.0K	0.0%	Consortium GARR	IT	—	—
193.206.128.0/22	1.0K	0.0%	Consortium GARR	IT	—	—
192.135.36.0/23	512	3.3%	Consortium GARR	IT	—	—
192.150.194.0/23	512	0.4%	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	—	—
193.204.216.0/23	512	0.0%	Consortium GARR	IT	—	—
193.206.134.0/23	512	0.0%	Consortium GARR	IT	—	—
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	5.1%	Consortium GARR	IT	—	—
192.107.51.0/24	256	29.7%	Consortium GARR	IT	—	—
192.107.100.0/24	256	76.2%	Consortium GARR	IT	—	—
192.132.34.0/24	256	53.1%	Consortium GARR	IT	—	—
192.133.28.0/24	256	7.4%	Consortium GARR	IT	Campania	Amorosi
192.135.36.0/24	256	6.3%	Consortium GARR	IT	—	—
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	94.1%	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	17.6%	Consortium GARR	IT	—	—
193.43.97.0/24	256	6.3%	Consortium GARR	IT	Emilia-Romagna	Bologna
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
193.204.218.0/24	256	0.0%	Consortium GARR	IT	—	—
193.206.133.0/24	256	0.0%	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	246,581	2026-09-10 11:48:53
192.135.35.0/24	34,735	2026-09-10 11:49:16
192.135.37.0/24	32,681	2026-09-10 11:48:53
192.106.234.0/24	24,486	2026-09-10 11:49:51
192.156.213.0/24	20,280	2026-09-10 11:48:53
192.41.218.0/24	19,209	2026-09-10 11:48:53
193.43.18.0/23	17,991	2026-09-10 11:48:53
193.43.117.0/24	17,967	2026-09-10 11:48:53
193.43.101.0/24	16,971	2026-09-10 11:48:53
150.217.0.0/16	16,900	2026-09-10 11:48:53
160.80.0.0/16	16,753	2026-09-10 11:49:16
149.132.0.0/16	16,746	2026-09-10 11:46:14
141.250.0.0/16	16,438	2026-09-10 11:48:53
156.148.0.0/16	16,402	2026-09-10 11:48:53
150.178.0.0/16	16,110	2026-09-10 11:49:51
143.225.0.0/16	16,030	2026-09-10 11:48:53
192.133.28.0/24	15,900	2026-09-10 11:48:53
157.27.0.0/16	15,826	2026-09-10 11:49:16
192.135.165.0/24	15,763	2026-09-10 11:48:53
192.132.34.0/24	15,749	2026-09-10 11:48:53
192.55.101.0/24	15,749	2026-09-10 11:48:53
192.135.34.0/24	15,728	2026-09-10 11:49:16
193.42.139.0/24	15,584	2026-09-10 11:49:16
192.107.100.0/24	15,581	2026-09-10 11:48:53
192.107.52.0/22	15,493	2026-09-10 11:46:14
192.107.51.0/24	15,374	2026-09-10 11:48:53
193.43.141.0/24	15,245	2026-09-10 11:49:16
192.135.36.0/24	14,883	2026-09-10 11:49:16
192.84.156.0/24	14,815	2026-09-10 11:48:53
151.97.0.0/16	14,708	2026-09-10 11:48:53
158.110.0.0/16	14,338	2026-09-10 11:48:53
193.43.97.0/24	13,879	2026-09-10 11:48:53
156.14.0.0/16	13,781	2026-09-10 11:48:53
192.146.242.0/24	13,736	2026-09-10 11:48:53
192.160.156.0/24	13,704	2026-09-10 11:48:53
149.139.0.0/16	13,687	2026-09-10 11:49:51
160.97.0.0/16	13,514	2026-09-10 11:48:53
192.167.59.0/24	13,468	2026-09-10 11:48:53
151.100.0.0/16	13,191	2026-09-10 11:48:53
192.150.196.0/24	13,186	2026-09-10 11:48:53
192.150.194.0/23	13,180	2026-09-10 11:48:53
160.78.0.0/16	13,139	2026-09-10 11:48:53
150.146.0.0/16	13,116	2026-09-10 11:49:57
159.149.0.0/16	13,067	2026-09-10 11:48:53
157.138.0.0/16	13,063	2026-09-10 11:49:05
131.154.0.0/16	12,928	2026-09-10 11:47:00
192.135.16.0/20	12,923	2026-09-10 11:47:00
131.175.0.0/16	12,922	2026-09-10 11:49:05
141.108.0.0/16	12,918	2026-09-10 11:47:00
140.164.0.0/16	12,915	2026-09-10 11:49:05

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 2.76M IPv4 addresses distributed across 83 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: 2026-09-10 11:54:05 UTC