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Autonomous System

AS131831

NEXON KOREA

Announced IPs
0
CIDR prefixes
0
ASN
AS131831

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 v1.3.0 — a transparent heuristic, not a definitive verdict. How it works →

⚠ 16 MOAS prefixes — multiple origin ASNs detected

All MOAS anomalies →

A previously stable prefix originated by AS131831 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)
122.0.128.0/22 AS131831, AS210528 2026-11-13 09:39:08
122.0.128.0/20 AS131831, AS210528 2026-11-13 09:39:08
122.0.248.0/22 AS131831, AS210528 2026-11-13 09:39:08
122.0.148.0/22 AS131831, AS210528 2026-11-13 09:39:08
122.0.140.0/22 AS131831, AS210528 2026-11-13 09:39:08
122.0.128.0/19 AS131831, AS210528 2026-11-13 09:39:08
122.0.152.0/22 AS131831, AS210528 2026-11-13 09:39:08
122.0.252.0/22 AS131831, AS210528 2026-11-13 09:39:08
122.0.240.0/22 AS131831, AS210528 2026-11-13 09:39:08
122.0.240.0/20 AS131831, AS210528 2026-11-13 09:39:08
122.0.136.0/22 AS131831, AS210528 2026-11-13 09:39:08
122.0.132.0/22 AS131831, AS210528 2026-11-13 09:39:08
122.0.156.0/22 AS131831, AS210528 2026-11-13 09:39:08
122.0.144.0/22 AS131831, AS210528 2026-11-13 09:39:08
122.0.144.0/20 AS131831, AS210528 2026-11-13 09:39:08

Showing the 15 most recently detected of 16 MOAS prefixes. Many multi-origin prefixes on large networks are benign (anycast); see all MOAS anomalies.

BGP Announced Prefixes

Live BGP anomalies →

Prefixes AS131831 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.

PrefixAnnouncement samplesLast seen
180.235.88.0/22 1,983 2026-06-24 17:21:21
180.235.80.0/22 1,974 2026-06-24 17:21:21
180.235.92.0/22 1,972 2026-06-24 17:21:21
180.235.84.0/22 1,971 2026-06-24 17:21:21
124.68.48.0/20 1,575 2026-06-24 17:32:39
124.68.32.0/20 1,479 2026-06-24 17:32:39
43.255.16.0/22 888 2026-06-24 17:32:39
103.239.0.0/22 854 2026-06-24 17:32:39
122.0.240.0/20 532 2026-11-13 09:19:32
122.0.252.0/22 528 2026-11-13 09:19:32
122.0.152.0/22 528 2026-11-13 09:19:32
122.0.148.0/22 528 2026-11-13 09:19:32
122.0.248.0/22 528 2026-11-13 09:19:32
122.0.132.0/22 528 2026-11-13 09:19:32
122.0.128.0/19 527 2026-11-13 09:19:32
122.0.140.0/22 527 2026-11-13 09:19:32
122.0.144.0/22 527 2026-11-13 09:19:32
122.0.128.0/22 527 2026-11-13 09:19:32
122.0.136.0/22 526 2026-11-13 09:19:32
122.0.156.0/22 524 2026-11-13 09:19:32
122.0.244.0/22 521 2026-11-13 09:19:32
122.0.240.0/22 520 2026-11-13 09:19:32
122.0.128.0/20 513 2026-11-13 09:19:32
122.0.144.0/20 509 2026-11-13 09:19:32

Frequently Asked Questions

What is AS131831?

AS131831 is an Autonomous System Number assigned to NEXON KOREA. 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 AS131831 announce?

AS131831 announces 0 IPv4 addresses distributed across 0 routed CIDR prefixes. The network is registered in South Korea.

Who operates AS131831?

AS131831 is operated by NEXON KOREA. The organization is based in South Korea. You can view all IP ranges and related ASNs on the organization page.

What country is AS131831 registered in?

AS131831 is registered in South Korea. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.

Last updated: 2026-11-13 09:39:05 UTC
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