ASN AS3661 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS3661?

AS3661 is listed under The Chinese University of Hong Kong.

What do peers, upstreams, and downstreams mean in ASN data?

Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.

What are routes and IP ranges for an ASN?

Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.

Why is WHOIS data shown for an ASN?

WHOIS data provides registration and contact context for ASN ownership, administration, and operational reference.

How can I access the full ASN tables?

The page shows a preview of large ASN datasets. Use the page controls to load more rows, and upgrade to a paid plan for complete access.

AS3661 The Chinese University of Hong Kong

The Chinese University of Hong Kong cuhk.edu.hk

HK 10 Routes

AS Data

AS3661

AS3661 – The Chinese University of Hong Kong

AS Number	3661
AS Name	ERX-CUHKNET
Organization	The Chinese University of Hong Kong(org-cuoh1-ap)
Country	HK
Website	cuhk.edu.hk
Number of IPv4 Routes	8
Number of IPv6 Routes	2
ASN type	EDUCATION
Registry	APNIC
Date Allocated	N/A

ASN Intelligence API for production workflows

Use ASN data for AS3661 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

Access complete peers, upstreams, downstreams, routes, WHOIS, and contact intelligence via our API. Learn more

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
103.49.160.0/22	AS3661	The Chinese University of Hong Kong	The Chinese University of Hong Kong	1024
202.40.216.0/24	AS3661	The Chinese University of Hong Kong	CUHK Library	256
2405:3000::/32	AS3661	The Chinese University of Hong Kong	The Chinese University of Hong Kong	~79×10²⁷
203.188.64.0/20	AS3661	The Chinese University of Hong Kong	The Chinese University of Hong Kong	4096
175.159.224.0/22	AS3661	The Chinese University of Hong Kong	The Chinese University of Hong Kong	1024
137.189.196.0/24	AS3661	The Chinese University of Hong Kong	The Chinese University of Hong Kong	256
137.189.0.0/16	AS3661	The Chinese University of Hong Kong	The Chinese University of Hong Kong	65536
137.189.162.0/24	AS3661	The Chinese University of Hong Kong	The Chinese University of Hong Kong	256
2001:ce0:3::/48	AS3661	The Chinese University of Hong Kong	Joint Universities Computer Centre Limited	~1×10²⁴
123.255.64.0/21	AS3661	The Chinese University of Hong Kong	The Chinese University of Hong Kong	2048

Raw Whois Response

% [whois.apnic.net]
% Whois data copyright terms    http://www.apnic.net/db/dbcopyright.html

% Information related to 'AS3661'

% Abuse contact for 'AS3661' is 'noc-admin@cuhk.edu.hk'

aut-num:        AS3661
as-name:        ERX-CUHKNET
descr:          The Chinese University of Hong Kong
descr:          Information Technology Services Centre
country:        HK
remarks:        This aut-num object created as part of the ER-Transfer from ARIN
org:            ORG-CUOH1-AP
admin-c:        NA17-AP
tech-c:         NT27-AP
abuse-c:        AC2019-AP
mnt-by:         APNIC-HM
mnt-lower:      MAINT-CUHKNET-HK
mnt-routes:     MAINT-CUHKNET-HK
mnt-irt:        IRT-CUHKNET-HK
last-modified:  2022-12-05T02:41:49Z
source:         APNIC

irt:            IRT-CUHKNET-HK
address:        Information Technology Services Centre,
address:        The Chinese University of Hong Kong,
address:        Shatin, N.T.
address:        Hong Kong
e-mail:         noc-admin@cuhk.edu.hk
abuse-mailbox:  noc-admin@cuhk.edu.hk
admin-c:        NA17-AP
tech-c:         NT27-AP
auth:           # Filtered
remarks:        noc-admin@cuhk.edu.hk was validated on 2025-11-12
mnt-by:         MAINT-CUHKNET-HK
last-modified:  2025-11-18T00:26:31Z
source:         APNIC

organisation:   ORG-CUOH1-AP
org-name:       The Chinese University of Hong Kong
org-type:       LIR
country:        HK
address:        Information Technology Service Centre
address:        G/F., Pi-Chiu Building
phone:          +852-3943-8848
fax-no:         +852-2603-5001
e-mail:         noc-admin@cuhk.edu.hk
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2023-09-05T02:14:42Z
source:         APNIC

role:           ABUSE CUHKNETHK
country:        ZZ
address:        Information Technology Services Centre,
address:        The Chinese University of Hong Kong,
address:        Shatin, N.T.
address:        Hong Kong
phone:          +000000000
e-mail:         noc-admin@cuhk.edu.hk
admin-c:        NA17-AP
tech-c:         NT27-AP
nic-hdl:        AC2019-AP
remarks:        Generated from irt object IRT-CUHKNET-HK
remarks:        noc-admin@cuhk.edu.hk was validated on 2025-11-12
abuse-mailbox:  noc-admin@cuhk.edu.hk
mnt-by:         APNIC-ABUSE
last-modified:  2025-11-12T01:03:41Z
source:         APNIC

person:         Network Administration Contact
address:        Information Technology Services Centre,
address:        The Chinese University of Hong Kong,
address:        Shatin, N.T.
address:        Hong Kong
country:        HK
phone:          +852-3943-8830
fax-no:         +852-2603-5001
e-mail:         noc-admin@cuhk.edu.hk
nic-hdl:        NA17-AP
notify:         noc-admin@cuhk.edu.hk
mnt-by:         MAINT-CUHKNET-HK
last-modified:  2012-09-19T01:45:32Z
source:         APNIC

person:         Network Technical Contact
address:        Information Technology Services Centre,
address:        The Chinese University of Hong Kong,
address:        Shatin, N.T.
address:        Hong Kong
country:        HK
phone:          +852-3943-8830
fax-no:         +852-2603-5001
e-mail:         noc-tech@cuhk.edu.hk
nic-hdl:        NT27-AP
notify:         noc-tech@cuhk.edu.hk
mnt-by:         MAINT-CUHKNET-HK
last-modified:  2012-09-19T01:46:08Z
source:         APNIC

% This query was served by the APNIC Whois Service version 1.88.34 (WHOIS-US2)



#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#


ASNumber:       3661 - 3662
ASName:         APNIC-3661
ASHandle:       AS3661
RegDate:        2002-07-31
Updated:        2009-10-08
Comment:        These AS numbers are not registered in the ARIN database.
Comment:        For details, refer to the APNIC Whois Database via
Comment:        WHOIS.APNIC.NET or http://wq.apnic.net/apnic-bin/whois.pl    
Ref:            https://rdap.arin.net/registry/autnum/3661

ResourceLink:  https://apps.db.ripe.net/db-web-ui/query
ResourceLink:  whois.apnic.net


OrgName:        Asia Pacific Network Information Centre
OrgId:          APNIC
Address:        PO Box 3646
City:           South Brisbane
StateProv:      QLD
PostalCode:     4101
Country:        AU
RegDate:        
Updated:        2012-01-24
Ref:            https://rdap.arin.net/registry/entity/APNIC

ReferralServer:  whois://whois.apnic.net
ResourceLink:  http://wq.apnic.net/whois-search/static/search.html

OrgTechHandle: AWC12-ARIN
OrgTechName:   APNIC Whois Contact
OrgTechPhone:  +61 7 3858 3188 
OrgTechEmail:  search-apnic-not-arin@apnic.net
OrgTechRef:    https://rdap.arin.net/registry/entity/AWC12-ARIN

OrgAbuseHandle: AWC12-ARIN
OrgAbuseName:   APNIC Whois Contact
OrgAbusePhone:  +61 7 3858 3188 
OrgAbuseEmail:  search-apnic-not-arin@apnic.net
OrgAbuseRef:    https://rdap.arin.net/registry/entity/AWC12-ARIN


#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#

Parsed Whois Response

Peers

AS Number	Description	Country
AS39120	Convergenze S.p.A.	IT
AS24482	SG.GS	SG
AS55720	Gigabit Hosting Sdn Bhd	MY
AS4635	Hong Kong Internet Exchange--Route Server 1	HK
AS6939	Hurricane Electric LLC	US
AS32590	Valve Corporation	US
AS8359	MTS PJSC	RU
AS137207	Joint Universities Computer Centre Limited	HK
AS4635	The Hong Kong Internet Exchange Limited	HK
AS7713	Telekomunikasi Indonesia PT	ID

Upstreams

AS Number	Description	Country
AS39120	Convergenze S.p.A.	IT
AS3662	Joint Universities Computer Centre Limited	HK
AS6939	Hurricane Electric LLC	US
AS8359	MTS PJSC	RU
AS137207	Joint Universities Computer Centre Limited	HK
AS4635	The Hong Kong Internet Exchange Limited	HK
AS7713	Telekomunikasi Indonesia PT	ID
AS38008	Aperture Science Limited	HK
AS4641	The Hong Kong Internet Exchange Limited	HK
AS45474	Nexusguard Pte. Ltd.	SG