AS138421 China Unicom

CU-CN-AS - China Unicom · registered in China

IPv4 addresses75,008126 prefixes · 0.002% of announced IPv4

Rank in China#115largest network in CN by IPv4 space, of 601 · 0.03% of CN

Rank worldwide#2,292of 79,396 networks with IPv4

IPv6532 x /4825 prefixes

CountryChina5,117 ASNs registered there

Open AS138421 in ASN lookup Look up an IP in this network (43.240.125.1) All networks in China

IPv4 prefixes

All 126 prefixes, in address order.

43.240.125.0/24
43.240.128.0/22
43.254.104.0/23
43.254.144.0/21
45.253.24.0/22
45.253.32.0/24
58.246.165.0/24
58.246.207.0/24
58.247.254.0/23
103.36.174.0/23
103.68.128.0/22
103.220.164.0/22
103.222.40.0/22
112.64.32.0/22
112.64.45.0/24
112.64.64.0/24
112.64.112.0/23
112.64.115.0/24
112.64.215.0/24
112.65.64.0/24
112.65.66.0/24
112.65.72.0/22
112.65.94.0/24
112.65.112.0/24
112.65.114.0/24
112.65.116.0/23
112.65.118.0/24
112.65.216.0/23
112.65.219.0/24
112.65.220.0/24
112.65.222.0/23
112.65.224.0/21
112.65.232.0/23
112.65.235.0/24
112.65.237.0/24
112.65.238.0/24
112.65.240.0/20
116.128.149.0/24
116.128.189.0/24
116.128.190.0/23
139.227.231.0/24
140.206.167.0/24
140.206.200.0/22
140.206.204.0/24
140.206.208.0/23
140.206.211.0/24
140.206.212.0/22
140.206.216.0/22
140.206.228.0/22
140.206.232.0/24
140.206.234.0/24
140.206.238.0/24
140.206.240.0/22
140.206.244.0/24
140.206.247.0/24
140.207.69.0/24
140.207.70.0/24
140.207.72.0/23
140.207.130.0/23
140.207.134.0/23
140.207.138.0/23
140.207.140.0/23
140.207.197.0/24
140.207.199.0/24
140.207.208.0/21
140.207.216.0/22
140.207.220.0/24
140.207.221.0/24
140.207.222.0/23
140.207.224.0/21
140.207.233.0/24
140.207.235.0/24
140.207.237.0/24
140.207.238.0/23
140.207.240.0/23
140.207.244.0/23
140.207.246.0/24
140.207.248.0/23
140.207.251.0/24
140.207.252.0/22
203.166.160.0/22
203.166.165.0/24
203.166.166.0/24
203.166.172.0/24
203.166.177.0/24
203.166.186.0/23
203.166.188.0/23
203.166.191.0/24
210.22.165.0/24
210.51.20.0/24
210.51.23.0/24
210.51.25.0/24
210.51.26.0/23
210.51.32.0/24
210.51.34.0/24
210.51.36.0/23
210.51.38.0/24
210.51.40.0/23
210.51.46.0/23
210.51.49.0/24
210.51.50.0/23
210.51.52.0/22
210.51.56.0/23
210.51.59.0/24
210.51.61.0/24
210.51.62.0/23
210.52.212.0/24
211.95.22.0/24
211.95.54.0/23
211.95.60.0/24
211.95.73.0/24
211.95.75.0/24
211.95.76.0/24
211.95.79.0/24
220.196.42.0/24
220.196.53.0/24
220.196.58.0/24
220.196.88.0/21
220.196.164.0/22
220.196.168.0/21
220.196.180.0/22
220.196.184.0/21
220.196.240.0/20
223.167.85.0/24
223.167.106.0/23
223.167.108.0/22

IPv6 prefixes

All 25 prefixes.

2402:f140:ff11::/48
2404:c940::/48
2406:d440:ffff::/48
2408:8000:9fff::/48
2408:80f1::/44
2408:80f1:40::/44
2408:80f1:70::/44
2408:80f1:110::/44
2408:80f1:120::/44
2408:80f1:160::/43
2408:80f1:1c0::/43
2408:80f1:1e0::/44
2408:80f1:220::/44
2408:80f1:240::/44
2408:870c::/44
2408:870c:20::/44
2408:870c:d0::/44
2408:870c:e0::/43
2408:870c:150::/44
2408:870c:2020::/43
2408:870c:2040::/43
2408:870c:2070::/44
2408:870c:2080::/42
2408:870c:20c0::/43
2408:870c:3000::/42

Other ASNs named China Unicom

1 other network uses the same organisation name; together with AS138421 they announce 140,544 IPv4 addresses.

ASNNameIPv4 addresses

AS137539UNICOM-Harbin-IDC - China Unicom CN65,536

Similar-sized networks in China

ASNNameIPv4 addresses

AS58541#112 CHINATELECOM-SHANDONG-QINGDAO-IDC - Qingdao,26600080,896

AS137697#113 CHINATELECOM-JiangSu-YangZhou-IDC - CHINATELECOM JiangSu YangZhou IDC networkdescr: YangZhou , Jiangsu Province, P.R.China.79,616

AS17969#114 CNT - ChongQing Broadcast & TV Transfer Network Co. Ltd75,520

AS139080#116 CMNET-SCIDC-CN - The Internet Data Center of Sichuan Mobile Communication Company Limited74,240

AS59037#117 RUILITECHNOLOGY - Zhejiang Ruili Information Technology Co., Ltd69,632

AS9814#118 FibrLINK - Beijing FibrLINK Networks Co.,Ltd.69,120

IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources