AS4158 — CITYUNI-AS-AP City University of Hong Kong

Network type: education

AS4158 announces 9 IPv4 prefixes covering 82,976 addresses and 1 IPv6 prefixes.

About this network

CITYUNI-AS-AP is City University of Hong Kong (CityU), a public research university in Kowloon Tong, Hong Kong.

What it's used for

• Campus networking for students, faculty, and staff: teaching, research, library, residence halls, and administrative systems.
• Research and inter-university connectivity within Hong Kong's academic networking community.

Notable

• This is institutional address space. Traffic from it is overwhelmingly campus users rather than commercial subscribers or hosted customers.
• The allocation is sizeable for a single campus (tens of thousands of addresses), reflecting an era when universities received generous IPv4 assignments.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 144.214.0.0/16
• 175.159.64.0/19
• 175.159.200.0/21
• 175.159.208.0/22
• 202.125.216.0/21
• 202.125.252.0/22
• 203.188.80.0/21
• 203.188.88.0/22
• 203.188.112.128/27
• 2001:ce0:5::/48

Upstream networks

• AS3662 Joint Universities Computer Centre Limited
• AS137207 Joint Universities Computer Centre Limited

Adjacent networks

• AS3662 Joint Universities Computer Centre Limited
• AS137207 Joint Universities Computer Centre Limited

Routing security

• RPKI: 0 valid, 0 invalid and 11 not-found announcements; 0 ROAs.
• ASPA: none published.
• IRR: 82% of announcements registered; 20 route objects.
• Listed in as-sets: AS-BTN-CUSTOMERS, AS-CTBC-TOOLS-6, AS-CTI-TELECOM, AS-HKBN-TRANSIT, AS-HKT-AS4515, AS-HKT-NETVIGATOR, AS-HKTCUSTOMER, AS-HURRICANE, AS-HURRICANEV6, AS-HUTCHCITY, AS-HWNG-DOWNSTREAMS, AS-IIJ, AS-KDD, AS-KDDI6, AS-KORNETBGP, AS-NEXUSGUARD-CLIENTS, AS-PACNET-CUSTOMER-PROXY-REGISTER, AS-PNAPLAX, AS-TELSTRA-INTL-CUSTOMERS-4637, AS-TMHK, AS-XO-B, AS137207:AS-HARNET-RE, AS137207:AS-HARNET-RE, AS20965:AS-FROM-TEIN-TO-GEANT, AS2497:AS-IIJ.