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
Active-threat / abuse risk −12
Isp allocation +5
Trust score 58 / 100

Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →

⚠ 36 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	2026-08-29 16:53:53
45.253.27.0/24	AS4812, AS138421	2026-08-29 16:53:53
116.63.96.0/20	AS4811, AS138421	2026-08-29 16:53:53
139.159.110.0/24	AS4811, AS138421	2026-08-29 16:53:53
103.211.44.0/22	AS4811, AS138421	2026-08-29 16:53:53
103.36.133.0/24	AS55994, AS138421	2026-08-29 16:53:53
210.51.45.0/24	AS9929, AS138421	2026-08-29 16:53:53
103.192.212.0/22	AS4811, AS138421	2026-08-29 16:53:53
139.159.108.0/23	AS4811, AS138421	2026-08-29 16:53:53
103.36.132.0/24	AS55994, AS138421	2026-08-29 16:53:53
43.240.192.0/22	AS4812, AS138421	2026-08-29 16:53:53
211.152.58.0/24	AS4811, AS138421	2026-08-29 16:53:53
103.36.135.0/24	AS55994, AS138421	2026-08-29 16:53:53
43.240.126.0/23	AS4811, AS138421	2026-08-29 16:53:53
103.6.223.0/24	AS4811, AS138421	2026-08-29 16:53:53

Showing the 15 most recently detected of 36 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%	China Unicom	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	41,982	2026-08-29 16:18:09
210.51.56.0/23	18,526	2026-08-29 16:18:14
43.240.125.0/24	15,945	2026-08-29 16:18:09
45.253.27.0/24	14,674	2026-08-29 16:18:09
45.253.26.0/24	14,624	2026-08-29 16:18:09
220.196.90.0/24	14,367	2026-08-29 16:18:14
43.240.130.0/23	14,104	2026-08-29 16:18:09
43.240.128.0/23	14,061	2026-08-29 16:18:09
43.254.104.0/24	14,051	2026-08-29 16:18:09
43.254.144.0/24	14,006	2026-08-29 16:18:09
43.254.105.0/24	13,981	2026-08-29 16:18:09
43.254.146.0/24	13,981	2026-08-29 16:18:09
43.254.145.0/24	13,958	2026-08-29 16:18:09
43.254.147.0/24	13,954	2026-08-29 16:18:09
223.167.85.0/24	13,772	2026-08-29 16:18:14
43.254.148.0/22	13,743	2026-08-29 16:18:09
103.36.174.0/23	13,715	2026-08-29 16:18:14
211.95.75.0/24	13,678	2026-08-29 16:18:14
112.64.33.0/24	13,662	2026-08-29 16:18:14
112.64.35.0/24	13,653	2026-08-29 16:18:14
112.64.34.0/24	13,649	2026-08-29 16:18:14
112.64.212.0/22	13,649	2026-08-29 16:18:14
58.246.207.0/24	13,620	2026-08-29 16:18:09
211.95.76.0/24	13,619	2026-08-29 16:18:14
112.64.112.0/22	13,615	2026-08-29 16:18:14
58.246.165.0/24	13,612	2026-08-29 16:18:09
112.64.32.0/24	13,611	2026-08-29 16:18:14
45.253.24.0/24	13,607	2026-08-29 16:18:09
220.196.53.0/24	13,605	2026-08-29 16:18:14
103.222.43.0/24	13,604	2026-08-29 16:18:14
223.167.111.0/24	13,598	2026-08-29 16:18:14
103.222.40.0/24	13,597	2026-08-29 16:18:14
223.167.110.0/24	13,596	2026-08-29 16:18:14
220.196.58.0/24	13,595	2026-08-29 16:18:14
103.222.41.0/24	13,590	2026-08-29 16:18:14
45.253.25.0/24	13,584	2026-08-29 16:18:09
103.222.42.0/24	13,578	2026-08-29 16:18:14
58.247.254.0/23	13,553	2026-08-29 16:18:09
210.51.61.0/24	13,508	2026-08-29 16:18:14
140.207.244.0/23	13,489	2026-08-29 16:18:14
140.207.245.0/24	13,465	2026-08-29 16:18:14
112.65.228.0/22	13,447	2026-08-29 16:18:14
210.51.27.0/24	13,432	2026-08-29 16:18:14
210.51.54.0/23	13,426	2026-08-29 16:18:14
112.65.64.0/24	13,422	2026-08-29 16:18:14
210.52.212.0/24	13,421	2026-08-29 16:18:14
210.51.59.0/24	13,419	2026-08-29 16:18:14
210.51.40.0/24	13,414	2026-08-29 16:18:14
220.196.91.0/24	13,410	2026-08-29 16:18:14
112.65.226.0/24	13,393	2026-08-29 16:18:14

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: 2026-08-29 16:54:06 UTC