AS151797 CTCSCI TECH LIMITED

CTCSCITECHLIMITED-AS-AP - CTCSCI TECH LIMITED · registered in Hong Kong

IPv4 addresses5121 prefixes · <0.001% of announced IPv4

Rank in Hong Kong#514largest network in HK by IPv4 space, of 735 · <0.01% of HK

Rank worldwide#47,917of 79,396 networks with IPv4

IPv64 x /484 prefixes

CountryHong Kong779 ASNs registered there

Open AS151797 in ASN lookup Look up an IP in this network (103.77.210.1) All networks in Hong Kong

IPv4 prefixes

All 1 prefix, in address order.

103.77.210.0/23

IPv6 prefixes

All 4 prefixes.

2401:3620:211::/48
2401:3620:221::/48
2401:3620:231::/48
2401:3620:232::/48

Other ASNs named CTCSCI TECH LIMITED

2 other networks use the same organisation name; together with AS151797 they announce 768 IPv4 addresses.

ASNNameIPv4 addresses

AS152111CTCSCITECHLIMITED-AS-AP - CTCSCI TECH LIMITED HK256

AS152112CTCSCITECHLIMITED-AS-AP - CTCSCI TECH LIMITED HKIPv6 only

Similar-sized networks in Hong Kong

ASNNameIPv4 addresses

AS134098#511 SYLVEON-AS-AP - Licson Internet Service512

AS207075#512 FOUNTAINHEAD FOUNTAINHEAD TECHNOLOGIES LIMITED512

AS135562#513 NGNHK-AS-AP - Nevigate Global Network (Hong Kong) Limited512

AS141163#515 ZHAOCHENGTECHNOLOGYHKCOLIMITED-AS-AP - ZHAO CHENG TECHNOLOGY (HK) CO., LIMITED512

AS154320#516 ARRIGA-AS-AP - Arriga International Limited512

AS9536#517 MACROVIEW-HK-AS-AP - Macroview Telecom Limited512

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