AS203997 xtdef-eu XTDef Limited

xtdef-eu XTDef Limited · registered in Hong Kong

IPv4 addresses2,0488 prefixes · <0.001% of announced IPv4

Rank in Hong Kong#302largest network in HK by IPv4 space, of 735 · 0.01% of HK

Rank worldwide#22,633of 79,396 networks with IPv4

IPv62 x /482 prefixes

CountryHong Kong779 ASNs registered there

Open AS203997 in ASN lookup Look up an IP in this network (81.18.60.1) All networks in Hong Kong

IPv4 prefixes

All 8 prefixes, in address order.

81.18.60.0/24
89.23.94.0/24
141.11.60.0/24
151.244.252.0/24
164.138.4.0/24
178.95.202.0/24
179.61.243.0/24
191.44.74.0/24

IPv6 prefixes

All 2 prefixes.

2a10:e8c0:43::/48
2a10:e8c0:358::/48

Similar-sized networks in Hong Kong

ASNNameIPv4 addresses

AS209109#299 DataSphere-Limited DataSphere (H.K) Limited2,048

AS24023#300 JNPR-APAC-AS-AP - Juniper Networks HK Ltd.2,048

AS131091#301 GSS-AS-AP - GSS Global2,048

AS131188#303 READYSPACE-HK - Global Gateway, Tsuen Wan, New Territories, Hong Kong2,048

AS136547#304 HUMENG-AS-AP - Humeng Technology International Co., Limited2,048

AS154309#305 INTELLIGENT1-AS-AP - Intelligent Cloud Limited2,048

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