AS3661 — ERX-CUHKNET The Chinese University of Hong Kong

Network type: education

AS3661 announces 6 IPv4 prefixes covering 73,984 addresses and 2 IPv6 prefixes.

About this network

ERX-CUHKNET is the campus network of The Chinese University of Hong Kong, one of Hong Kong's major research universities.

What it's used for

• Campus, research, and administrative networking for CUHK, including faculties, research institutes, libraries, and student residences.
• Onward connectivity for the university into Hong Kong's academic and commercial internet exchanges.

Notable

• The ERX- prefix marks this as an Early Registration Transfer record: the allocation predates APNIC's authority over the region and was later moved from the ARIN-era registry into APNIC's care.
• University address space is institutional — labs, offices, and campus Wi-Fi rather than residential subscribers.

Interesting

• Hong Kong's universities were among the earliest Asian institutions on the global internet, which is why one of them holds a number this far down the range.

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

Announced prefixes

• 103.49.160.0/22
• 123.255.64.0/21
• 137.189.0.0/16
• 175.159.224.0/22
• 202.40.216.0/24
• 203.188.64.0/20
• 2001:ce0:3::/48
• 2405:3000::/32

Upstream networks

• AS3662 Joint Universities Computer Centre Limited
• AS6939 Hurricane Electric LLC
• AS137207 Joint Universities Computer Centre Limited
• AS4635 Hong Kong Internet Exchange--Route Server 1
• AS24482 SG.GS
• AS55720 Gigabit Hosting Sdn Bhd
• AS8359 MTS PJSC

Adjacent networks

• AS3662 Joint Universities Computer Centre Limited
• AS6939 Hurricane Electric LLC
• AS137207 Joint Universities Computer Centre Limited
• AS4635 Hong Kong Internet Exchange--Route Server 1
• AS24482 SG.GS
• AS55720 Gigabit Hosting Sdn Bhd
• AS8359 MTS PJSC

Internet exchanges

• Hong Kong Internet Exchange — Hong Kong, China