AS55991 CNNIC ASN block

AS55991-36 - CNNIC ASN block · registered in China

IPv4 addresses8,96010 prefixes · <0.001% of announced IPv4

Rank in China#243largest network in CN by IPv4 space, of 601 · <0.01% of CN

Rank worldwide#9,810of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryChina5,117 ASNs registered there

Open AS55991 in ASN lookup Look up an IP in this network (43.228.204.1) All networks in China

IPv4 prefixes

All 10 prefixes, in address order.

43.228.204.0/22
43.228.240.0/22
45.124.76.0/22
103.41.116.0/22
103.43.132.0/24
103.43.134.0/23
103.56.100.0/22
103.56.104.0/22
103.192.208.0/22
103.235.100.0/22

Similar-sized networks in China

ASNNameIPv4 addresses

AS152120#240 UNICOM-TJGC-IDC - China Unicom TianJing GaoCun IDC network9,216

AS63718#241 HZ-YOUYUN - Hangzhou YouYun Technology Co., Ltd.9,216

AS56282#242 VClouD - Beijing Internet Harbor Technology Co., Ltd9,216

AS139154#244 CEGN-SD - Big Data Center Of Shandong Province8,704

AS17633#245 CHINATELECOM-SD-AS-AP - ASN for Shandong Provincial Net of CT8,704

AS146834#246 XunYou - SiChuan XunYou Network Technologe Limit, co8,448

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