AS23881 UDomain Web Hosting Company Ltd

UDOMAIN-AS-AP - UDomain Web Hosting Company Ltd · registered in Hong Kong

IPv4 addresses18,17630 prefixes · <0.001% of announced IPv4

Rank in Hong Kong#90largest network in HK by IPv4 space, of 735 · 0.09% of HK

Rank worldwide#6,500of 79,396 networks with IPv4

IPv62 x /481 prefixes

CountryHong Kong779 ASNs registered there

Open AS23881 in ASN lookup Look up an IP in this network (23.226.0.1) All networks in Hong Kong

IPv4 prefixes

All 30 prefixes, in address order.

23.226.0.0/22
23.226.4.0/24
23.226.6.0/23
23.226.8.0/24
23.226.11.0/24
45.121.192.0/23
45.121.194.0/24
45.121.196.0/22
45.121.200.0/23
45.121.203.0/24
103.15.180.0/23
103.15.183.0/24
103.15.192.0/24
103.15.194.0/23
103.15.196.0/23
103.15.199.0/24
103.19.25.0/24
103.19.26.0/23
162.247.0.0/24
162.247.2.0/23
203.90.224.0/22
203.90.228.0/23
203.90.230.0/24
203.90.254.0/24
203.135.128.0/20
203.135.146.0/23
203.135.148.0/22
203.135.153.0/24
203.135.154.0/23
203.135.156.0/22

IPv6 prefixes

All 1 prefix.

2400:c300::/47

Similar-sized networks in Hong Kong

ASNNameIPv4 addresses

AS208525#87 AIRULIMITED Airu Limited18,944

AS134729#88 JPTL-AS-AP - JOINT POWER TECHNOLOGY LIMITED18,432

AS149175#89 UFWDTL-AS-AP - UNION FU WAH DIGITAL TECHNOLOGY LIMITED18,176

AS133380#91 LAYER-AS - Layerstack Limited18,176

AS142578#92 ELARGEHONGKONGLI-AS-AP - E-Large (HongKong)18,176

AS135357#93 PCCW22-HK - HONG KONG KOWLOON TELECOMMUNICATIONS CO.,LIMITED17,920

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