What is ASN AS139021?

ASN AS139021 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS139021?

AS139021 is listed under West263 International Limited.

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.

AS139021 West263 International Limited

West263 International Limited hkdns.hk

HK 25 Routes

AS Data

AS139021

AS139021 – West263 International Limited

AS Number	139021
AS Name	WEST263GO-HK
Organization	West263 International Limited (org-wil4-ap)
Country	HK
Website	hkdns.hk
Number of IPv4 Routes	23
Number of IPv6 Routes	2
ASN type	BUSINESS
Registry	APNIC
Date Allocated	N/A

ASN Intelligence API for production workflows

Use ASN data for AS139021 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
43.224.155.0/24	AS139021	West263 International Limited	West263 International Limited	256
103.96.148.0/22	AS139021	West263 International Limited	West263 International Limited	1024
103.139.0.0/22	AS139021	West263 International Limited	Sichuan Yihu Data Technology Co.,Ltd, Global Plaza, 99 North Section of First Ring Road, Chengdu, Sichuan, China	1024
43.249.3.0/24	AS139021	West263 International Limited	West263 International Limited	256
219.234.8.0/23	AS139021	West263 International Limited	Sichuan Yihu Data Technology Co.,Ltd, Global Plaza, 99 North Section of First Ring Road, Chengdu, Sichuan, China	512
103.108.194.0/23	AS139021	West263 International Limited	Sichuan Yihu Data Technology Co.,Ltd, Global Plaza, 99 North Section of First Ring Road, Chengdu, Sichuan, China	512
103.24.248.0/22	AS139021	West263 International Limited	West263 International Limited	1024
43.249.0.0/24	AS139021	West263 International Limited	ZHONGYA PTE.LTD sg.eshosting.com	256
2404:ccc0::/32	AS139021	West263 International Limited	West263 International Limited	~79×10²⁷
103.120.82.0/23	AS139021	West263 International Limited	WEST263 INTERNATIONAL LIMITED	512
2404:ccc0:263::/48	AS139021	West263 International Limited	West263 International Limited	~1×10²⁴
103.96.150.0/24	AS139021	West263 International Limited	West263 International Limited	256
103.43.188.0/22	AS139021	West263 International Limited	West263 International Limited	1024
218.247.64.0/19	AS139021	West263 International Limited	Sichuan Yihu Data Technology Co.,Ltd, Global Plaza, 99 North Section of First Ring Road, Chengdu, Sichuan, China	8192
43.224.152.0/23	AS139021	West263 International Limited	West263 International Limited	512
43.249.0.0/23	AS139021	West263 International Limited	ZHONGYA PTE.LTD sg.eshosting.com	512
43.224.154.0/24	AS139021	West263 International Limited	West263 International Limited	256
103.108.192.0/23	AS139021	West263 International Limited	Sichuan Yihu Data Technology Co.,Ltd, Global Plaza, 99 North Section of First Ring Road, Chengdu, Sichuan, China	512
219.234.16.0/20	AS139021	West263 International Limited	Sichuan Yihu Data Technology Co.,Ltd, Global Plaza, 99 North Section of First Ring Road, Chengdu, Sichuan, China	4096
43.250.116.0/22	AS139021	West263 International Limited	Sichuan Yihu Data Technology Co.,Ltd, Global Plaza, 99 North Section of First Ring Road, Chengdu, Sichuan, China	1024
103.96.151.0/24	AS139021	West263 International Limited	West263 International Limited	256
103.96.148.0/23	AS139021	West263 International Limited	West263 International Limited	512
103.120.80.0/23	AS139021	West263 International Limited	WEST263 INTERNATIONAL LIMITED	512
219.234.0.0/21	AS139021	West263 International Limited	Sichuan Yihu Data Technology Co.,Ltd, Global Plaza, 99 North Section of First Ring Road, Chengdu, Sichuan, China	2048
43.249.2.0/24	AS139021	West263 International Limited	ZHONGYA PTE.LTD sg.eshosting.com	256

Raw Whois Response

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

% Information related to 'AS138554 - AS139577'

as-block:       AS138554 - AS139577
descr:          APNIC ASN block
remarks:        These AS numbers are further assigned by APNIC
remarks:        to APNIC members and end-users in the APNIC region
admin-c:        HM20-AP
tech-c:         HM20-AP
mnt-by:         APNIC-HM
mnt-lower:      APNIC-HM
last-modified:  2017-12-08T06:45:58Z
source:         APNIC

role:           APNIC Hostmaster
address:        6 Cordelia Street
address:        South Brisbane
address:        QLD 4101
country:        AU
phone:          +61 7 3858 3100
fax-no:         +61 7 3858 3199
e-mail:         helpdesk@apnic.net
admin-c:        AMS11-AP
tech-c:         AH256-AP
nic-hdl:        HM20-AP
remarks:        Administrator for APNIC
notify:         hostmaster@apnic.net
mnt-by:         MAINT-APNIC-AP
last-modified:  2013-10-23T04:06:51Z
source:         APNIC

% Information related to 'AS139021'

% Abuse contact for 'AS139021' is 'westabuse.noc@gmail.com'

aut-num:        AS139021
as-name:        WEST263GO-HK
descr:          West263 International Limited
country:        HK
org:            ORG-WIL4-AP
admin-c:        WILA3-AP
tech-c:         DY1085-AP
abuse-c:        AW1023-AP
mnt-lower:      MAINT-WEST263GO-HK
mnt-routes:     MAINT-WEST263GO-HK
mnt-by:         APNIC-HM
mnt-irt:        IRT-WEST263GO-HK
last-modified:  2020-10-14T01:44:39Z
source:         APNIC

irt:            IRT-WEST263GO-HK
address:        12/F,, San Toi Building,, 137-139 Connaught Road Central, Hong Kong,, Hong Kong Hong Kong 999077
e-mail:         westabuse.noc@gmail.com
abuse-mailbox:  westabuse.noc@gmail.com
admin-c:        WILA3-AP
tech-c:         DY1085-AP
auth:           # Filtered
remarks:        westabuse.noc@gmail.com
remarks:        westabuse.noc@gmail.com
remarks:        westabuse.noc@gmail.com was validated on 2026-03-30
mnt-by:         MAINT-WEST263GO-HK
last-modified:  2026-03-30T02:42:35Z
source:         APNIC

organisation:   ORG-WIL4-AP
org-name:       West263 International Limited
org-type:       LIR
country:        HK
address:        12/F,
address:        San Toi Building,
address:        137-139 Connaught Road Central, Hong Kong,
phone:          +852-35979075
e-mail:         lillian@hkdns.hk
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2023-09-05T02:17:35Z
source:         APNIC

role:           ABUSE WEST263GOHK
country:        ZZ
address:        12/F,, San Toi Building,, 137-139 Connaught Road Central, Hong Kong,, Hong Kong Hong Kong 999077
phone:          +000000000
e-mail:         westabuse.noc@gmail.com
admin-c:        WILA3-AP
tech-c:         DY1085-AP
nic-hdl:        AW1023-AP
remarks:        Generated from irt object IRT-WEST263GO-HK
remarks:        westabuse.noc@gmail.com was validated on 2026-03-30
abuse-mailbox:  westabuse.noc@gmail.com
mnt-by:         APNIC-ABUSE
last-modified:  2026-03-30T02:42:57Z
source:         APNIC

role:           West263 International Limited administrator
address:        12/F,, San Toi Building,, 137-139 Connaught Road Central, Hong Kong,, Hong Kong Hong Kong 999077
country:        HK
phone:          +15708412741
fax-no:         +15708412741
e-mail:         abuse@hkdns.hk
admin-c:        WILA3-AP
tech-c:         DY1085-AP
nic-hdl:        WILA3-AP
mnt-by:         MAINT-WEST263GO-HK
last-modified:  2018-12-03T15:18:11Z
source:         APNIC

person:         David Yanping
address:        12/F,, San Toi Building,, 137-139 Connaught Road Central, Hong Kong,, Hong Kong Hong Kong 999077
country:        HK
phone:          +852-35979075
e-mail:         david.yanp@gmail.com
nic-hdl:        DY1085-AP
mnt-by:         MAINT-WEST263GO-HK
last-modified:  2019-04-29T06:51:07Z
source:         APNIC

% This query was served by the APNIC Whois Service version 1.88.48 (WHOIS-UK2)

Parsed Whois Response

{
  "status" : true,
  "whois_server" : "whois.apnic.net",
  "as_blocks" : [ {
    "as_block" : "AS138554 - AS139577",
    "description" : [ "APNIC ASN block" ],
    "admin_contacts" : [ "HM20-AP" ],
    "tech_contacts" : [ "HM20-AP" ],
    "remarks" : [ "These AS numbers are further assigned by APNIC", "to APNIC members and end-users in the APNIC region" ],
    "mnt_by" : [ "APNIC-HM" ],
    "mnt_lower" : [ "APNIC-HM" ],
    "date_updated" : "2017-12-08",
    "source" : "APNIC"
  } ],
  "aut_nums" : [ {
    "aut_num" : "AS139021",
    "as_name" : "WEST263GO-HK",
    "description" : [ "West263 International Limited" ],
    "country" : "HK",
    "organization" : "ORG-WIL4-AP",
    "admin_contacts" : [ "WILA3-AP" ],
    "tech_contacts" : [ "DY1085-AP" ],
    "abuse_contacts" : [ "AW1023-AP" ],
    "mnt_irt" : [ "IRT-WEST263GO-HK" ],
    "mnt_lower" : [ "MAINT-WEST263GO-HK" ],
    "mnt_routes" : [ "MAINT-WEST263GO-HK" ],
    "mnt_by" : [ "APNIC-HM" ],
    "date_updated" : "2020-10-14",
    "source" : "APNIC"
  } ],
  "irt" : {
    "handle" : "IRT-WEST263GO-HK",
    "address" : [ "12/F,, San Toi Building,, 137-139 Connaught Road Central, Hong Kong,, Hong Kong Hong Kong 999077" ],
    "street" : "Connaught Road Central",
    "city" : "Kong",
    "zip_code" : "999077",
    "country" : "HONG KONG",
    "email" : [ "westabuse.noc@gmail.com" ],
    "abuse_mailbox" : [ "westabuse.noc@gmail.com" ],
    "admin_contacts" : [ "WILA3-AP" ],
    "tech_contacts" : [ "DY1085-AP" ],
    "remarks" : [ "westabuse.noc@gmail.com", "westabuse.noc@gmail.com", "westabuse.noc@gmail.com was validated on 2026-03-30" ],
    "mnt_by" : [ "MAINT-WEST263GO-HK" ],
    "date_updated" : "2026-03-30",
    "source" : "APNIC"
  },
  "organization" : {
    "handle" : "ORG-WIL4-AP",
    "name" : "West263 International Limited",
    "type" : "LIR",
    "address" : [ "12/F,", "San Toi Building,", "137-139 Connaught Road Central, Hong Kong," ],
    "street" : "Connaught Road",
    "city" : "Central",
    "country" : [ "HK" ],
    "email" : [ "lillian@hkdns.hk" ],
    "phone" : [ "+852-35979075" ],
    "mnt_ref" : [ "APNIC-HM" ],
    "mnt_by" : [ "APNIC-HM" ],
    "date_updated" : "2023-09-05",
    "source" : "APNIC",
    "addressCountry" : "HONG KONG"
  },
  "administrative_contacts" : [ {
    "handle" : "WILA3-AP",
    "name" : "West263 International Limited administrator",
    "address" : [ "12/F,, San Toi Building,, 137-139 Connaught Road Central, Hong Kong,, Hong Kong Hong Kong 999077" ],
    "street" : "Connaught Road Central",
    "city" : "Kong",
    "zip_code" : "999077",
    "country" : "HK",
    "email" : [ "abuse@hkdns.hk" ],
    "phone" : [ "+15708412741" ],
    "fax_no" : [ "+15708412741" ],
    "admin_contacts" : [ "WILA3-AP" ],
    "tech_contacts" : [ "DY1085-AP" ],
    "mnt_by" : [ "MAINT-WEST263GO-HK" ],
    "date_updated" : "2018-12-03",
    "source" : "APNIC",
    "addressCountry" : "HONG KONG"
  } ],
  "technical_contacts" : [ {
    "handle" : "DY1085-AP",
    "name" : "David Yanping",
    "address" : [ "12/F,, San Toi Building,, 137-139 Connaught Road Central, Hong Kong,, Hong Kong Hong Kong 999077" ],
    "street" : "Connaught Road Central",
    "city" : "Kong",
    "zip_code" : "999077",
    "country" : "HK",
    "email" : [ "david.yanp@gmail.com" ],
    "phone" : [ "+852-35979075" ],
    "mnt_by" : [ "MAINT-WEST263GO-HK" ],
    "date_updated" : "2019-04-29",
    "source" : "APNIC",
    "addressCountry" : "HONG KONG"
  } ],
  "abuse_contacts" : [ {
    "handle" : "AW1023-AP",
    "name" : "ABUSE WEST263GOHK",
    "address" : [ "12/F,, San Toi Building,, 137-139 Connaught Road Central, Hong Kong,, Hong Kong Hong Kong 999077" ],
    "street" : "Connaught Road Central",
    "city" : "Kong",
    "zip_code" : "999077",
    "country" : "ZZ",
    "email" : [ "westabuse.noc@gmail.com" ],
    "abuse_mailbox" : [ "westabuse.noc@gmail.com" ],
    "phone" : [ "+000000000" ],
    "admin_contacts" : [ "WILA3-AP" ],
    "tech_contacts" : [ "DY1085-AP" ],
    "remarks" : [ "Generated from irt object IRT-WEST263GO-HK", "westabuse.noc@gmail.com was validated on 2026-03-30" ],
    "mnt_by" : [ "APNIC-ABUSE" ],
    "date_updated" : "2026-03-30",
    "source" : "APNIC",
    "addressCountry" : "HONG KONG"
  } ]
}

Peers

AS Number	Description	Country
AS39120	Convergenze S.p.A.	IT
AS24482	SG.GS	SG
AS4837	China Unicom Backbone	CN
AS4635	Hong Kong Internet Exchange--Route Server 1	HK
AS58453	China Mobile International Limited	HK
AS132585	SkyExchange Internet Access	HK
AS32590	Valve Corporation	US
AS8359	MTS PJSC	RU
AS4635	The Hong Kong Internet Exchange Limited	HK
AS149416	TIANFENG (HONG KONG) COMMUNICATIONS LIMITED	HK
AS132585	PCCW IMS Ltd PCCW Business Internet Access	HK
AS4837	CHINA UNICOM China169 Backbone	CN
AS36236	NetActuate, Inc	US
AS216458	Hardcore Communication Co., Limited	HK
AS58717	Summit Communications Ltd	BD
AS140627	OneQode	AU
AS49304	SAKURA LINK LIMITED	HK
AS132337	Axclusive	SG
AS49544	i3D.net B.V	NL

Upstreams

AS Number	Description	Country
AS39120	Convergenze S.p.A.	IT
AS58453	China Mobile International Limited	HK
AS132585	PCCW IMS Ltd PCCW Business Internet Access	HK
AS4837	CHINA UNICOM China169 Backbone	CN
AS8359	MTS PJSC	RU
AS4635	The Hong Kong Internet Exchange Limited	HK
AS49304	SAKURA LINK LIMITED	HK