AS152111 CTCSCI TECH LIMITED

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

IPv4 addresses2561 prefixes · <0.001% of announced IPv4

Rank in Hong Kong#630largest network in HK by IPv4 space, of 735 · <0.01% of HK

Rank worldwide#61,849of 79,396 networks with IPv4

IPv61 x /481 prefixes

CountryHong Kong779 ASNs registered there

Open AS152111 in ASN lookup Look up an IP in this network (206.54.42.1) All networks in Hong Kong

IPv4 prefixes

All 1 prefix, in address order.

206.54.42.0/24

IPv6 prefixes

All 1 prefix.

2401:3620:2201::/48

Other ASNs named CTCSCI TECH LIMITED

2 other networks use the same organisation name; together with AS152111 they announce 768 IPv4 addresses.

ASNNameIPv4 addresses

AS151797CTCSCITECHLIMITED-AS-AP - CTCSCI TECH LIMITED HK512

AS152112CTCSCITECHLIMITED-AS-AP - CTCSCI TECH LIMITED HKIPv6 only

Similar-sized networks in Hong Kong

ASNNameIPv4 addresses

AS58516#627 AMS-IX-AP - Amsterdam Internet Exchange256

AS133926#628 BOCOMM-AS-AP - Bank of Communications (Hong Kong) Limited256

AS134997#629 YFNET-AS-AP - YFNET256

AS154162#631 ISIF-AS-AP - ISIF LIMITED256

AS154204#632 SEIL-AS-AP - Shine Effort Inc Limited256

AS154811#633 ZTABOXLIMITED-AS-AP - ZTABOX LIMITED256

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