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Autonomous System

AS51185

MainStreaming SpA

Announced IPs
6,144
CIDR prefixes
10
ASN
AS51185

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.

65/100
Moderate
How this score is built

Experimental · trust-vectors model v1.2.1 — a transparent heuristic, not a definitive verdict. How it works →

Network profile

Source: PeeringDB →
Geographic scope Global
Peering policy Open
IRR record RIPE::AS51185:AS-CUSTOMERS

Present at 21 internet exchanges: MegaIX Dusseldorf, France-IX Paris, MegaIX Frankfurt, AMS-IX, Any2West, DE-CIX Frankfurt: DE-CIX Frankfurt Peering LAN, LINX LON1: Main, MIX-IT, Namex Rome: VLAN Peering, NYIIX New York, …

Top CIDR ranges

CIDRIPsPTR DensityOrganizationCountryStateCity
45.157.64.0/22 1.0K
0.0%
MainStreaming SpA IT Lazio Rome
94.124.68.0/22 1.0K
9.0%
MainStreaming SpA IT Lombardy Milan
178.248.48.0/22 1.0K
0.4%
MainStreaming SpA IT Lombardy Milan
185.187.156.0/22 1.0K
3.5%
MainStreaming SpA IT — —
94.124.64.0/23 512
3.9%
MainStreaming SpA IT Lombardy Milan
178.248.50.0/23 512
0.2%
MainStreaming SpA IT Lombardy Milan
178.248.52.0/23 512
0.4%
MainStreaming SpA IT — —
45.157.64.0/24 256
0.0%
MainStreaming SpA IT Lazio Rome
45.157.65.0/24 256
0.0%
MainStreaming SpA DE — —
45.157.66.0/24 256
0.0%
MainStreaming SpA GR — —
94.124.64.0/24 256
0.0%
MainStreaming SpA DE — —
94.124.65.0/24 256
7.8%
MainStreaming SpA IT — —
94.124.67.0/24 256
99.6%
MainStreaming SpA IT Lombardy Milan
178.248.48.0/24 256
0.8%
MainStreaming SpA IT Lombardy Milan
178.248.49.0/24 256
0.4%
MainStreaming SpA NL North Holland Amsterdam
178.248.54.0/24 256
0.8%
MainStreaming SpA IT — —
185.45.208.0/24 256
3.5%
MainStreaming SpA IT — —
185.45.211.0/24 256
0.0%
MainStreaming SpA IT — —
185.187.156.0/24 256
3.5%
MainStreaming SpA GB — —
185.187.157.0/24 256
3.5%
MainStreaming SpA FR Provence-Alpes-Côte d'Azur Marseille
185.187.158.0/24 256
3.5%
MainStreaming SpA SG — —
185.187.159.0/24 256
3.5%
MainStreaming SpA IT — —
45.157.67.0/25 128
0.0%
MainStreaming SpA ES Madrid Madrid
45.157.67.128/25 128
0.0%
MainStreaming SpA FR Île-de-France Paris
185.45.208.0/25 128
3.9%
MainStreaming SpA IT — —
185.45.208.128/25 128
3.9%
MainStreaming SpA NL — —
185.45.211.128/25 128
0.0%
MainStreaming SpA IT — —
185.45.211.64/26 64
0.0%
MainStreaming SpA IT — —
185.45.211.32/27 32
0.0%
MainStreaming SpA IT — —
185.45.211.16/28 16
0.0%
MainStreaming SpA IT — —
185.45.211.8/29 8
0.0%
MainStreaming SpA IT — —
185.45.211.0/30 4
0.0%
MainStreaming SpA GB — —
185.45.211.4/30 4
0.0%
MainStreaming SpA IT — —

BGP Announced Prefixes

Live BGP anomalies →

Prefixes AS51185 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.

PrefixAnnouncement samplesLast seen
178.248.53.0/24 117,620 2026-10-20 09:43:36
45.157.66.0/24 100,053 2026-10-20 09:42:52
178.248.52.0/24 92,850 2026-10-20 09:42:59
178.248.54.0/24 77,790 2026-10-20 09:43:03
45.157.67.0/24 70,659 2026-10-20 09:43:03
94.124.67.0/24 65,182 2026-10-20 09:43:06
94.124.65.0/24 64,730 2026-10-20 09:43:06
94.124.71.0/24 62,024 2026-10-20 09:42:56
94.124.69.0/24 61,996 2026-10-20 09:42:56
94.124.68.0/24 61,967 2026-10-20 09:42:56
45.157.65.0/24 59,497 2026-10-20 09:42:49
94.124.70.0/24 57,090 2026-10-20 09:42:59
94.124.64.0/24 56,068 2026-10-20 09:42:49
178.248.48.0/24 48,522 2026-10-20 09:42:56
178.248.51.0/24 46,962 2026-10-20 09:42:56
178.248.50.0/24 44,151 2026-10-20 09:43:06
185.45.211.0/24 43,360 2026-10-20 09:42:49
45.157.64.0/24 38,310 2026-10-20 09:43:04
185.187.159.0/24 34,942 2026-10-20 09:43:12
185.187.158.0/24 32,327 2026-10-20 08:45:07
185.187.157.0/24 27,928 2026-10-20 09:42:59
185.187.156.0/24 23,917 2026-10-20 09:43:13
178.248.49.0/24 23,796 2026-10-20 09:43:05
185.45.208.0/24 20,515 2026-10-20 09:42:49

Frequently Asked Questions

What is AS51185?

AS51185 is an Autonomous System Number assigned to MainStreaming SpA. 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 AS51185 announce?

AS51185 announces 6.1K IPv4 addresses distributed across 10 routed CIDR prefixes. The network is registered in Italy.

Who operates AS51185?

AS51185 is operated by MainStreaming SpA. The organization is based in Italy. You can view all IP ranges and related ASNs on the organization page.

What country is AS51185 registered in?

AS51185 is registered in Italy. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.

Last updated: 2026-10-20 18:39:05 UTC
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