Autonomous System

AS138421

China Unicom

China Unicom China 🌐 chinaunicom.cn

Announced IPs

164,096

CIDR prefixes

140

ASN

AS138421

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.

58/100

Caution

How this score is built

Baseline (neutral) 65
Multiple-origin (MOAS) routing anomaly −12
Isp allocation +5
Trust score 58 / 100

Experimental · trust-vectors model v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →

⚠ 28 MOAS prefixes — multiple origin ASNs detected

All MOAS anomalies →

A previously stable prefix originated by AS138421 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)
116.198.144.0/20	AS4811, AS138421	2026-07-18 11:52:44
45.253.26.0/24	AS4812, AS138421	2026-07-18 11:52:44
116.63.96.0/20	AS4811, AS138421	2026-07-18 11:52:44
139.159.110.0/24	AS4811, AS138421	2026-07-18 11:52:44
210.51.45.0/24	AS9929, AS138421	2026-07-18 11:52:44
103.192.212.0/22	AS4811, AS138421	2026-07-18 11:52:44
210.51.29.0/24	AS9929, AS138421	2026-07-18 11:52:44
103.222.43.0/24	AS4812, AS138421	2026-07-18 11:52:44
43.240.192.0/22	AS4812, AS138421	2026-07-18 11:52:44
103.222.42.0/24	AS4812, AS138421	2026-07-18 11:52:44
43.240.126.0/23	AS4811, AS138421	2026-07-18 11:52:44
122.9.64.0/19	AS4811, AS138421	2026-07-18 11:52:44
114.67.64.0/18	AS4811, AS138421	2026-07-18 11:52:44
45.253.27.0/24	AS4812, AS138421	2026-07-18 11:52:44
140.210.128.0/19	AS4811, AS138421	2026-07-18 11:52:44

Showing the 15 most recently detected of 28 MOAS prefixes. Many multi-origin prefixes on large networks are benign (anycast); see all MOAS anomalies.

Top CIDR ranges

CIDR	IPs	PTR Density	Organization	Country	State	City
114.67.64.0/18	16.4K	0.2%	China Unicom	CN	—	—
116.63.192.0/18	16.4K	95.8%	China Unicom	CN	Shanghai	Shanghai
116.63.32.0/19	8.2K	95.6%	China Unicom	CN	Shanghai	Shanghai
116.63.96.0/19	8.2K	95.7%	China Unicom	CN	Shanghai	Shanghai
122.9.64.0/19	8.2K	97.2%	China Unicom	CN	Shanghai	Shanghai
140.210.128.0/19	8.2K	92.2%	China Unicom	CN	Shanghai	Shanghai
112.65.240.0/20	4.1K	1.0%	China Unicom	CN	—	—
116.198.144.0/20	4.1K	0.0%	China Unicom	CN	—	—
116.198.160.0/20	4.1K	0.0%	China Unicom	CN	—	—
122.9.176.0/20	4.1K	96.9%	China Unicom	CN	Shanghai	Shanghai
140.207.208.0/20	4.1K	0.1%	China Unicom	CN	—	—
220.196.240.0/20	4.1K	0.0%	China Unicom	CN	—	—
43.254.144.0/21	2.0K	0.0%	China Unicom	CN	—	—
112.65.224.0/21	2.0K	0.3%	China Unicom	CN	—	—
116.196.192.0/21	2.0K	95.2%	China Unicom	CN	Shanghai	Shanghai
116.198.176.0/21	2.0K	0.0%	China Unicom	CN	—	—
139.159.96.0/21	2.0K	0.0%	China Unicom	CN	—	—
140.207.224.0/21	2.0K	0.4%	China Unicom	CN	—	—
220.196.88.0/21	2.0K	0.0%	China Unicom	CN	—	—
220.196.168.0/21	2.0K	0.0%	China Unicom	CN	—	—
220.196.184.0/21	2.0K	0.0%	China Unicom	CN	—	—
43.240.124.0/22	1.0K	0.4%	China Unicom	CN	—	—
43.240.128.0/22	1.0K	0.0%	China Unicom	CN	—	—
43.240.192.0/22	1.0K	0.2%	China Unicom	CN	—	—
43.254.44.0/22	1.0K	0.2%	China Unicom	CN	—	—
45.253.24.0/22	1.0K	0.0%	China Unicom	CN	—	—
103.68.128.0/22	1.0K	0.0%	China Unicom	CN	—	—
103.192.212.0/22	1.0K	0.0%	China Unicom	CN	—	—
103.220.164.0/22	1.0K	0.0%	China Unicom	CN	—	—
103.222.40.0/22	1.0K	0.0%	China Unicom	CN	Shanghai	Shanghai
112.64.32.0/22	1.0K	0.1%	China Unicom	CN	—	—
112.65.72.0/22	1.0K	0.0%	China Unicom	CN	—	—
140.206.200.0/22	1.0K	0.0%	China Unicom	CN	—	—
140.206.212.0/22	1.0K	0.0%	China Unicom	CN	—	—
140.206.216.0/22	1.0K	0.0%	China Unicom	CN	—	—
140.206.228.0/22	1.0K	0.0%	China Unicom	CN	—	—
140.206.240.0/22	1.0K	1.9%	China Unicom	CN	—	—
140.207.252.0/22	1.0K	0.0%	China Unicom	CN	—	—
203.166.160.0/22	1.0K	2.8%	China Unicom	CN	—	—
210.51.52.0/22	1.0K	2.5%	China Unicom	CN	—	—
220.196.164.0/22	1.0K	0.2%	China Unicom	CN	—	—
220.196.180.0/22	1.0K	0.0%	China Unicom	CN	—	—
223.167.108.0/22	1.0K	0.1%	China Unicom	CN	—	—
43.254.104.0/23	512	0.2%	China Unicom	CN	—	—
58.247.254.0/23	512	0.0%	China Unicom	CN	—	—
103.6.222.0/23	512	0.2%	China Unicom	CN	—	—
103.36.174.0/23	512	0.4%	China Unicom	CN	—	—
112.64.112.0/23	512	0.6%	China Unicom	CN	—	—
112.65.116.0/23	512	0.0%	China Unicom	CN	—	—
112.65.216.0/23	512	0.0%	China Unicom	CN	—	—
112.65.222.0/23	512	0.2%	China Unicom	CN	—	—
112.65.232.0/23	512	0.4%	China Unicom	CN	—	—
116.128.190.0/23	512	0.0%	China Unicom	CN	—	—
139.159.108.0/23	512	0.0%	China Unicom	CN	—	—
140.206.208.0/23	512	0.2%	China Unicom	CN	—	—
140.207.72.0/23	512	0.0%	China Unicom	CN	—	—
140.207.130.0/23	512	0.0%	China Unicom	CN	—	—
140.207.134.0/23	512	0.0%	China Unicom	CN	—	—
140.207.138.0/23	512	0.0%	China Unicom	CN	—	—
140.207.140.0/23	512	0.0%	China Unicom	CN	—	—
140.207.238.0/23	512	0.2%	China Unicom	CN	—	—
140.207.240.0/23	512	0.2%	China Unicom	CN	—	—
140.207.244.0/23	512	0.0%	China Unicom	CN	—	—
140.207.248.0/23	512	0.0%	China Unicom	CN	—	—
203.166.186.0/23	512	0.4%	China Unicom	CN	—	—
203.166.188.0/23	512	0.2%	China Unicom	CN	—	—
210.51.26.0/23	512	2.1%	China Unicom	CN	—	—
210.51.36.0/23	512	1.2%	China Unicom	CN	—	—
210.51.40.0/23	512	0.6%	China Unicom	CN	—	—
210.51.46.0/23	512	1.0%	China Unicom	CN	—	—
210.51.50.0/23	512	2.5%	China Unicom	CN	—	—
210.51.56.0/23	512	2.9%	China Unicom	CN	—	—
210.51.62.0/23	512	0.0%	China Unicom	CN	—	—
211.95.54.0/23	512	0.4%	China Unicom	CN	—	—
223.167.106.0/23	512	0.0%	China Unicom	CN	—	—
1.1.8.0/24	256	0.0%	China Unicom	CN	—	—
43.240.125.0/24	256	0.0%	—	CN	—	—
43.254.106.0/24	256	0.0%	China Unicom	CN	—	—
45.253.32.0/24	256	0.0%	China Unicom	CN	—	—
58.246.165.0/24	256	0.0%	China Unicom	CN	—	—
58.246.207.0/24	256	0.0%	China Unicom	CN	—	—
112.64.45.0/24	256	0.0%	China Unicom	CN	—	—
112.64.64.0/24	256	0.0%	China Unicom	CN	—	—
112.64.115.0/24	256	0.0%	China Unicom	CN	—	—
112.64.215.0/24	256	0.0%	China Unicom	CN	—	—
112.65.64.0/24	256	0.0%	China Unicom	CN	—	—
112.65.66.0/24	256	0.0%	China Unicom	CN	—	—
112.65.94.0/24	256	0.0%	China Unicom	CN	—	—
112.65.112.0/24	256	0.0%	China Unicom	CN	—	—
112.65.219.0/24	256	2.7%	China Unicom	CN	—	—
112.65.220.0/24	256	0.0%	China Unicom	CN	—	—
112.65.235.0/24	256	0.0%	China Unicom	CN	—	—
112.65.237.0/24	256	0.0%	China Unicom	CN	—	—
112.65.238.0/24	256	0.0%	China Unicom	CN	—	—
116.128.149.0/24	256	0.0%	China Unicom	CN	—	—
116.128.189.0/24	256	0.0%	China Unicom	CN	—	—
139.159.110.0/24	256	0.0%	China Unicom	CN	—	—
139.227.231.0/24	256	0.4%	China Unicom	CN	—	—
140.206.167.0/24	256	0.4%	China Unicom	CN	—	—
140.206.204.0/24	256	0.4%	China Unicom	CN	—	—

BGP Announced Prefixes

Live BGP anomalies →

Prefixes AS138421 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
1.1.8.0/24	19,593	2026-07-18 11:30:18
43.240.125.0/24	9,972	2026-07-18 10:52:22
45.253.27.0/24	8,762	2026-07-18 10:52:22
45.253.26.0/24	8,717	2026-07-18 10:52:22
43.240.130.0/23	8,147	2026-07-18 10:52:22
43.240.128.0/23	8,136	2026-07-18 10:52:22
43.254.104.0/24	8,109	2026-07-18 10:52:22
43.254.105.0/24	8,087	2026-07-18 10:52:22
43.254.147.0/24	8,074	2026-07-18 10:52:22
112.64.35.0/24	8,073	2026-07-18 10:52:22
43.254.145.0/24	8,071	2026-07-18 10:52:22
43.254.146.0/24	8,068	2026-07-18 10:52:22
112.64.33.0/24	8,067	2026-07-18 10:52:22
112.64.212.0/22	8,060	2026-07-18 10:52:22
43.254.144.0/24	8,059	2026-07-18 10:52:22
112.64.34.0/24	8,056	2026-07-18 10:52:22
112.64.112.0/22	8,035	2026-07-18 10:52:22
112.64.32.0/24	8,031	2026-07-18 10:52:22
43.254.148.0/22	8,017	2026-07-18 10:52:22
58.246.165.0/24	7,959	2026-07-18 10:52:22
58.246.207.0/24	7,953	2026-07-18 10:52:22
45.253.24.0/24	7,945	2026-07-18 10:52:22
103.222.40.0/24	7,931	2026-07-18 10:52:22
103.222.43.0/24	7,929	2026-07-18 10:52:22
45.253.25.0/24	7,923	2026-07-18 10:52:22
103.222.42.0/24	7,919	2026-07-18 10:52:22
103.222.41.0/24	7,916	2026-07-18 10:52:22
58.247.254.0/23	7,905	2026-07-18 10:52:22
112.65.226.0/24	7,873	2026-07-18 10:52:11
112.65.228.0/22	7,860	2026-07-18 10:52:11
112.65.112.0/24	7,856	2026-07-18 10:52:22
103.36.174.0/23	7,855	2026-07-18 10:52:22
112.65.235.0/24	7,853	2026-07-18 10:52:11
112.65.64.0/24	7,852	2026-07-18 10:52:22
103.220.167.0/24	7,850	2026-07-18 10:52:22
112.65.72.0/24	7,839	2026-07-18 10:52:22
112.65.237.0/24	7,831	2026-07-18 10:52:11
112.65.223.0/24	7,828	2026-07-18 10:52:22
112.65.117.0/24	7,828	2026-07-18 10:52:22
112.65.116.0/24	7,820	2026-07-18 10:52:22
112.65.222.0/24	7,820	2026-07-18 10:52:22
112.65.227.0/24	7,820	2026-07-18 10:52:22
112.65.74.0/24	7,819	2026-07-18 10:52:22
112.65.73.0/24	7,819	2026-07-18 10:52:22
112.65.219.0/24	7,816	2026-07-18 10:52:22
112.65.238.0/24	7,815	2026-07-18 10:52:22
112.64.45.0/24	7,814	2026-07-18 10:52:22
112.65.75.0/24	7,809	2026-07-18 10:52:22
112.65.220.0/24	7,806	2026-07-18 10:52:22
112.65.94.0/24	7,803	2026-07-18 10:52:22

Showing top 50 of 255 announced prefixes by sample volume.

Frequently Asked Questions

What is AS138421?

AS138421 is an Autonomous System Number assigned to China Unicom. 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 AS138421 announce?

AS138421 announces 164.1K IPv4 addresses distributed across 140 routed CIDR prefixes. The network is registered in China.

Who operates AS138421?

AS138421 is operated by China Unicom. The organization is based in China. You can view all IP ranges and related ASNs on the organization page.

What country is AS138421 registered in?

AS138421 is registered in China. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.

Last updated: 2026-07-18 11:40:32 UTC