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Autonomous System

AS9466

UUNET Japan Limited

Announced IPs
82,944
CIDR prefixes
22
ASN
AS9466

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.

53/100
Caution
How this score is built

Experimental · trust-vectors model v1.1.0 — 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 AS9466 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.

PrefixOrigin ASNsLast detected (UTC)
144.250.40.0/24 AS9466, AS11308 2026-07-17 19:22:38

Top CIDR ranges

CIDRIPsPTR DensityOrganizationCountryStateCity
138.198.0.0/16 65.5K
0.1%
UUNET Japan Limited GB
138.198.128.0/17 32.8K
0.0%
CH
138.198.32.0/19 8.2K
0.0%
CH
138.198.64.0/19 8.2K
0.0%
CH
202.1.128.0/19 8.2K
0.0%
UUNET Japan Limited SG
138.198.16.0/20 4.1K
0.0%
CH
138.198.112.0/20 4.1K
0.0%
CH
138.198.8.0/21 2.0K
0.0%
CH
138.198.104.0/21 2.0K
0.0%
CH
138.198.0.0/22 1.0K
0.0%
CH
138.198.96.0/22 1.0K
0.0%
CH
203.6.36.0/22 1.0K
0.0%
UUNET Japan Limited AU
203.6.68.0/22 1.0K
2.6%
UUNET Japan Limited AU
203.6.76.0/22 1.0K
2.7%
UUNET Japan Limited AU
138.198.6.0/23 512
0.0%
CH
138.198.102.0/23 512
0.0%
CH
202.125.0.0/23 512
0.0%
UUNET Japan Limited AU
202.125.6.0/23 512
0.0%
UUNET Japan Limited AU
203.6.32.0/23 512
0.0%
UUNET Japan Limited AU
203.6.64.0/23 512
0.0%
UUNET Japan Limited AU
203.6.72.0/23 512
0.0%
UUNET Japan Limited AU
203.6.118.0/23 512
0.0%
UUNET Japan Limited AU
203.6.120.0/23 512
0.0%
UUNET Japan Limited AU
103.3.198.0/24 256
1.2%
UUNET Japan Limited AU
103.109.16.0/24 256
0.0%
UUNET Japan Limited AU New South Wales Sydney
138.198.4.0/24 256
0.0%
IN
138.198.5.0/24 256
0.0%
CH
138.198.100.0/24 256
0.0%
SG
138.198.101.0/24 256
0.0%
CH
185.31.58.0/24 256
37.9%
UUNET Japan Limited IT
202.125.2.0/24 256
0.0%
UUNET Japan Limited AU
203.5.217.0/24 256
0.0%
UUNET Japan Limited AU
203.6.31.0/24 256
0.0%
UUNET Japan Limited AU
203.6.67.0/24 256
0.4%
UUNET Japan Limited AU
203.6.75.0/24 256
0.0%
UUNET Japan Limited AU
203.10.217.0/24 256
0.0%
UUNET Japan Limited AU
203.11.0.0/24 256
0.0%
UUNET Japan Limited AU
144.250.40.128/25 128
0.0%
US
144.250.40.64/26 64
0.0%
US
144.250.40.32/27 32
0.0%
US
144.250.40.16/28 16
0.0%
US
144.250.40.8/29 8
0.0%
SG
144.250.40.0/30 4
0.0%
US
144.250.40.6/31 2
0.0%
US
144.250.40.4 1
0.0%
US
144.250.40.5 1
0.0%
SG

BGP Announced Prefixes

Live BGP anomalies →

Prefixes AS9466 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.

PrefixAnnouncement samplesLast seen
138.198.0.0/16 61,245 2026-07-18 10:52:54
202.1.128.0/19 60,670 2026-07-18 10:52:54
138.198.4.0/24 19,206 2026-07-18 10:52:54
144.250.40.0/24 12,973 2026-07-18 10:52:51
103.3.198.0/24 7,454 2026-07-18 10:54:40
138.198.100.0/24 6,715 2026-07-16 04:32:56
203.11.0.0/24 5,984 2026-07-18 10:52:51
203.6.120.0/24 5,947 2026-07-18 10:52:51
203.6.118.0/24 5,910 2026-07-18 10:52:51
203.6.64.0/21 5,880 2026-07-18 10:52:51
203.6.32.0/24 5,874 2026-07-18 10:52:51
203.10.217.0/24 5,849 2026-07-18 10:52:51
203.6.33.0/24 5,842 2026-07-18 10:52:51
203.5.217.0/24 5,834 2026-07-18 10:52:51
203.6.36.0/22 5,776 2026-07-18 10:52:51
103.109.16.0/24 4,614 2026-07-18 10:52:04
203.6.119.0/24 4,071 2026-07-18 10:52:51
203.6.72.0/21 4,054 2026-07-18 10:52:51
203.6.31.0/24 4,026 2026-07-18 10:52:51
203.6.121.0/24 4,010 2026-07-18 10:52:51
202.125.0.0/22 3,846 2026-07-18 10:52:52
202.125.4.0/22 3,829 2026-07-18 10:52:52
185.31.58.0/24 3,549 2026-07-11 09:49:27

Frequently Asked Questions

What is AS9466?

AS9466 is an Autonomous System Number assigned to UUNET Japan Limited. 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 AS9466 announce?

AS9466 announces 82.9K IPv4 addresses distributed across 22 routed CIDR prefixes. The network is registered in United Kingdom.

Who operates AS9466?

AS9466 is operated by UUNET Japan Limited. The organization is based in United Kingdom. You can view all IP ranges and related ASNs on the organization page.

What country is AS9466 registered in?

AS9466 is registered in United Kingdom. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.

Last updated: 2026-07-18 11:25:31 UTC
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