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ASN Lookup Tool
AS3661 ERX-CUHKNET

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ASN Extended Info API & BGP Active Prefixes API
ASN Details
ASN
AS3661
Organisation
The Chinese University of Hong Kong
Name
ERX-CUHKNET
Total IPv4 Addresses
73,984
Total IPv4 Prefixes
14
Total IPv6 Prefixes
2
Total IPv4 Bogon Prefixes
0
Total IPv6 Bogon Prefixes
0
IPv4 Space Rank
#2,357 out of 77,684
Registry
Apnic
Registered Country
HK flag HK
Registered Country Name
Hong Kong
Registered Date
Registration Last Change
2022-12-05
Receiving From

The list of active Autonomous Systems (ASs) which send traffic to that ASN.

ASN
Organisation
AS137207
HK flagJoint Universities Computer Centre Limited
AS7713
ID flagTelekomunikasi Indonesia (PT)
AS8359
RU flagMTS PJSC
AS6939
US flagHurricane Electric LLC
AS38195
AU flagSUPERLOOP (AUSTRALIA) PTY LTD
Showing 5 of 19
IPv4 Active Prefixes

This provides the list of IPv4 address space routes/prefixes currently announced on Border Gateway Protocol (BGP).

Prefix103.49.160.0/22
Range From103.49.160.0
Range To103.49.163.255
Prefix123.255.64.0/21
Range From123.255.64.0
Range To123.255.71.255
Prefix137.189.0.0/17
Range From137.189.0.0
Range To137.189.127.255
Prefix137.189.128.0/18
Range From137.189.128.0
Range To137.189.191.255
Prefix137.189.192.0/22
Range From137.189.192.0
Range To137.189.195.255
Showing 5 of 14
IPv6 Active Prefixes
Prefix2001:ce0:3::/48
Range From2001:ce0:3::
Range To2001:ce0:3:ffff:ffff:ffff:ffff:ffff
Prefix2405:3000::/32
Range From2405:3000::
Range To2405:3000:ffff:ffff:ffff:ffff:ffff:ffff
Autonomous System (AS) is a network (or collection of networks) that are all managed and supervised by a single entity or organisation. This tool provides a comprehensive ownership and connectivity report for any given AS number.