Autonomous System
AS3661 The Chinese University of Hong Kong
EducationActiveHong Kong SAR ChinaAPNIC
AS3661 (ERX-CUHKNET) is an education network operated by The Chinese University of Hong Kong in Hong Kong SAR China, registered with APNIC. It has 7 IPv4 prefixes with 74,240 addresses and 2 IPv6 prefixes, which makes it the 2,841st largest of 82,200 active autonomous systems by IPv4 space.
IPv4 addresses74,240in 7 prefixes
IPv6 prefixes2≈ 7.9 × 10²⁸ addresses
Size rank#2,841of 82,200 active ASNs
Details
OrganizationThe Chinese University of Hong Kong
AS nameERX-CUHKNET
Websitecuhk.edu.hk
Country Hong Kong SAR China (HK)
Network typeEducation
RegistryAPNIC
Abuse contactnoc-admin@cuhk.edu.hk
Registered—
Last updated2022-12-05
IPv4 prefixes
7 prefixes · 74,240 addresses| Network | Addresses | First – last address |
|---|---|---|
| 137.189.0.0/16 | 65,536 | 137.189.0.0 – 137.189.255.255 |
| 203.188.64.0/20 | 4,096 | 203.188.64.0 – 203.188.79.255 |
| 123.255.64.0/21 | 2,048 | 123.255.64.0 – 123.255.71.255 |
| 103.49.160.0/22 | 1,024 | 103.49.160.0 – 103.49.163.255 |
| 175.159.224.0/22 | 1,024 | 175.159.224.0 – 175.159.227.255 |
| 137.189.196.0/24 | 256 | 137.189.196.0 – 137.189.196.255 |
| 202.40.216.0/24 | 256 | 202.40.216.0 – 202.40.216.255 |
137.189.0.0/16 203.188.64.0/20 123.255.64.0/21 103.49.160.0/22 175.159.224.0/22 137.189.196.0/24 202.40.216.0/24
IPv6 prefixes
2 prefixes- 2405:3000::/32
- 2001:ce0:3::/48
2405:3000::/32 2001:ce0:3::/48
Query AS3661 with the API
The ASN lookup returns everything on this page as JSON, including every prefix. ASN lookups need an API key: a free account comes with 1,000 requests a day.
curl "https://api.ipapi.is/?q=AS3661&key=YOUR_API_KEY"Any address in its prefixes resolves to AS3661, with or without a key:
curl "https://api.ipapi.is/?q=137.189.0.1"Largest networks in Hong Kong SAR China
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