23881 UDOMAIN-AS-AP UDomain Web Hosting Company Ltd, HK
Adjacency: 5 Upstream: 5 Downstream: 0
Upstream Adjacent AS list
AS10098 HENDERSON-HK Towngas Telecommunications Fixed Network Ltd, HK
AS140570 HKBCS-AS-AP Hong Kong Beecloud System Technology Services Limited, HK
AS9304 HUTCHISON-AS-AP HGC Global Communications Limited, HK
AS60068 CDN77 _, GB
AS4515 ERX-STAR HKT Limited, HK
Rank AS Type Originate Addr Space (pfx) Transit Addr space (pfx) Description 7367 AS23881 ORIGIN Originate: 17920 /17.87 Transit: 0 /0.00 UDOMAIN-AS-AP UDomain Web Hosting Company Ltd, HK
Aggregation Suggestions
Filter: Aggregates, Specifics
This report does not take into account conditions local to each origin AS in terms of policy or traffic engineering requirements, so this is an approximate guideline as to aggregation possibilities.
Rank AS AS Name Current Wthdw Aggte Annce Redctn % 2453 AS23881 UDOMAIN-AS-AP UDomain Web Hosting Company Ltd 70 36 13 47 23 32.86% Prefix AS Path Aggregation Suggestion 23.226.0.0/22 2914 140570 23881 + Announce - aggregate of 23.226.0.0/23 (2914 140570 23881) and 23.226.2.0/23 (2914 140570 23881) 23.226.0.0/24 2914 140570 23881 - Withdrawn - aggregated with 23.226.1.0/24 (2914 140570 23881) 23.226.1.0/24 2914 140570 23881 - Withdrawn - aggregated with 23.226.0.0/24 (2914 140570 23881) 23.226.2.0/24 2914 140570 23881 - Withdrawn - aggregated with 23.226.3.0/24 (2914 140570 23881) 23.226.3.0/24 2914 140570 23881 - Withdrawn - aggregated with 23.226.2.0/24 (2914 140570 23881) 23.226.4.0/24 2914 140570 23881 23.226.6.0/24 2914 140570 23881 23.226.7.0/24 6939 140570 23881 23.226.8.0/24 2914 140570 23881 23.226.11.0/24 2914 140570 23881 45.121.192.0/24 2914 140570 23881 45.121.194.0/24 2914 140570 23881 45.121.196.0/22 2914 140570 23881 + Announce - aggregate of 45.121.196.0/23 (2914 140570 23881) and 45.121.198.0/23 (2914 140570 23881) 45.121.196.0/24 2914 140570 23881 - Withdrawn - aggregated with 45.121.197.0/24 (2914 140570 23881) 45.121.197.0/24 2914 140570 23881 - Withdrawn - aggregated with 45.121.196.0/24 (2914 140570 23881) 45.121.198.0/24 2914 140570 23881 - Withdrawn - aggregated with 45.121.199.0/24 (2914 140570 23881) 45.121.199.0/24 2914 140570 23881 - Withdrawn - aggregated with 45.121.198.0/24 (2914 140570 23881) 45.121.200.0/24 2914 140570 23881 45.121.201.0/24 3257 60068 23881 45.121.203.0/24 2914 140570 23881 103.15.180.0/23 2914 140570 23881 + Announce - aggregate of 103.15.180.0/24 (2914 140570 23881) and 103.15.181.0/24 (2914 140570 23881) 103.15.180.0/24 2914 140570 23881 - Withdrawn - aggregated with 103.15.181.0/24 (2914 140570 23881) 103.15.181.0/24 2914 140570 23881 - Withdrawn - aggregated with 103.15.180.0/24 (2914 140570 23881) 103.15.183.0/24 6939 140570 23881 103.15.192.0/24 2914 140570 23881 103.15.194.0/24 2914 140570 23881 103.15.195.0/24 6939 140570 23881 103.15.196.0/23 2914 140570 23881 + Announce - aggregate of 103.15.196.0/24 (2914 140570 23881) and 103.15.197.0/24 (2914 140570 23881) 103.15.196.0/24 2914 140570 23881 - Withdrawn - aggregated with 103.15.197.0/24 (2914 140570 23881) 103.15.197.0/24 2914 140570 23881 - Withdrawn - aggregated with 103.15.196.0/24 (2914 140570 23881) 103.15.199.0/24 2914 140570 23881 103.19.25.0/24 6939 140570 23881 103.19.26.0/24 2914 140570 23881 103.19.27.0/24 6939 140570 23881 162.247.0.0/24 2914 140570 23881 162.247.2.0/24 2914 140570 23881 162.247.3.0/24 6939 140570 23881 203.90.224.0/22 2914 140570 23881 + Announce - aggregate of 203.90.224.0/23 (2914 140570 23881) and 203.90.226.0/23 (2914 140570 23881) 203.90.224.0/24 2914 140570 23881 - Withdrawn - aggregated with 203.90.225.0/24 (2914 140570 23881) 203.90.225.0/24 2914 140570 23881 - Withdrawn - aggregated with 203.90.224.0/24 (2914 140570 23881) 203.90.226.0/24 2914 140570 23881 - Withdrawn - aggregated with 203.90.227.0/24 (2914 140570 23881) 203.90.227.0/24 2914 140570 23881 - Withdrawn - aggregated with 203.90.226.0/24 (2914 140570 23881) 203.90.228.0/23 2914 140570 23881 + Announce - aggregate of 203.90.228.0/24 (2914 140570 23881) and 203.90.229.0/24 (2914 140570 23881) 203.90.228.0/24 2914 140570 23881 - Withdrawn - aggregated with 203.90.229.0/24 (2914 140570 23881) 203.90.229.0/24 2914 140570 23881 - Withdrawn - aggregated with 203.90.228.0/24 (2914 140570 23881) 203.90.230.0/24 2914 140570 23881 203.90.254.0/24 2914 140570 23881 203.135.128.0/24 2914 140570 23881 203.135.129.0/24 2914 9304 23881 203.135.130.0/23 2914 140570 23881 + Announce - aggregate of 203.135.130.0/24 (2914 140570 23881) and 203.135.131.0/24 (2914 140570 23881) 203.135.130.0/24 2914 140570 23881 - Withdrawn - aggregated with 203.135.131.0/24 (2914 140570 23881) 203.135.131.0/24 2914 140570 23881 - Withdrawn - aggregated with 203.135.130.0/24 (2914 140570 23881) 203.135.132.0/24 293 3491 4515 23881 23881 203.135.133.0/24 2914 140570 23881 203.135.134.0/23 2914 140570 23881 + Announce - aggregate of 203.135.134.0/24 (2914 140570 23881) and 203.135.135.0/24 (2914 140570 23881) 203.135.134.0/24 2914 140570 23881 - Withdrawn - aggregated with 203.135.135.0/24 (2914 140570 23881) 203.135.135.0/24 2914 140570 23881 - Withdrawn - aggregated with 203.135.134.0/24 (2914 140570 23881) 203.135.136.0/23 2914 140570 23881 + Announce - aggregate of 203.135.136.0/24 (2914 140570 23881) and 203.135.137.0/24 (2914 140570 23881) 203.135.136.0/24 2914 140570 23881 - Withdrawn - aggregated with 203.135.137.0/24 (2914 140570 23881) 203.135.137.0/24 2914 140570 23881 - Withdrawn - aggregated with 203.135.136.0/24 (2914 140570 23881) 203.135.138.0/24 2914 140570 23881 203.135.139.0/24 6939 140570 23881 203.135.140.0/22 2914 140570 23881 + Announce - aggregate of 203.135.140.0/23 (2914 140570 23881) and 203.135.142.0/23 (2914 140570 23881) 203.135.140.0/24 2914 140570 23881 - Withdrawn - aggregated with 203.135.141.0/24 (2914 140570 23881) 203.135.141.0/24 2914 140570 23881 - Withdrawn - aggregated with 203.135.140.0/24 (2914 140570 23881) 203.135.142.0/24 2914 140570 23881 - Withdrawn - aggregated with 203.135.143.0/24 (2914 140570 23881) 203.135.143.0/24 2914 140570 23881 - Withdrawn - aggregated with 203.135.142.0/24 (2914 140570 23881) 203.135.146.0/23 2914 140570 23881 + Announce - aggregate of 203.135.146.0/24 (2914 140570 23881) and 203.135.147.0/24 (2914 140570 23881) 203.135.146.0/24 2914 140570 23881 - Withdrawn - aggregated with 203.135.147.0/24 (2914 140570 23881) 203.135.147.0/24 2914 140570 23881 - Withdrawn - aggregated with 203.135.146.0/24 (2914 140570 23881) 203.135.148.0/22 2914 140570 23881 + Announce - aggregate of 203.135.148.0/23 (2914 140570 23881) and 203.135.150.0/23 (2914 140570 23881) 203.135.148.0/24 2914 140570 23881 - Withdrawn - aggregated with 203.135.149.0/24 (2914 140570 23881) 203.135.149.0/24 2914 140570 23881 - Withdrawn - aggregated with 203.135.148.0/24 (2914 140570 23881) 203.135.150.0/24 2914 140570 23881 - Withdrawn - aggregated with 203.135.151.0/24 (2914 140570 23881) 203.135.151.0/24 2914 140570 23881 - Withdrawn - aggregated with 203.135.150.0/24 (2914 140570 23881) 203.135.153.0/24 2914 140570 23881 203.135.154.0/24 2914 140570 23881 203.135.155.0/24 6939 140570 23881 203.135.156.0/24 2914 9304 23881 203.135.157.0/24 2914 140570 23881 203.135.158.0/23 2914 140570 23881 + Announce - aggregate of 203.135.158.0/24 (2914 140570 23881) and 203.135.159.0/24 (2914 140570 23881) 203.135.158.0/24 2914 140570 23881 - Withdrawn - aggregated with 203.135.159.0/24 (2914 140570 23881) 203.135.159.0/24 2914 140570 23881 - Withdrawn - aggregated with 203.135.158.0/24 (2914 140570 23881)
Advertisements that are fragments of the original RIR allocation (more specifics) originated by this AS.
AS23881 84 More Specifics 89 Total Advertisements UDOMAIN-AS-AP UDomain Web Hosting Company Ltd, HK
23.226.0.0/24 23.226.0.0/20
23.226.1.0/24 23.226.0.0/20
23.226.2.0/24 23.226.0.0/20
23.226.3.0/24 23.226.0.0/20
23.226.4.0/24 23.226.0.0/20
23.226.5.0/24 23.226.0.0/20
23.226.6.0/24 23.226.0.0/20
23.226.7.0/24 23.226.0.0/20
23.226.8.0/24 23.226.0.0/20
23.226.10.0/24 23.226.0.0/20
23.226.11.0/24 23.226.0.0/20
23.226.13.0/24 23.226.0.0/20
23.226.14.0/24 23.226.0.0/20
23.226.15.0/24 23.226.0.0/20
45.121.192.0/24 45.121.192.0/22
45.121.193.0/24 45.121.192.0/22
45.121.194.0/24 45.121.192.0/22
45.121.195.0/24 45.121.192.0/22
45.121.196.0/24 45.121.196.0/22
45.121.197.0/24 45.121.196.0/22
45.121.198.0/24 45.121.196.0/22
45.121.199.0/24 45.121.196.0/22
45.121.200.0/24 45.121.200.0/22
45.121.201.0/24 45.121.200.0/22
45.121.203.0/24 45.121.200.0/22
103.15.180.0/24 103.15.180.0/22
103.15.181.0/24 103.15.180.0/22
103.15.183.0/24 103.15.180.0/22
103.15.192.0/24 103.15.192.0/22
103.15.194.0/24 103.15.192.0/22
103.15.195.0/24 103.15.192.0/22
103.15.196.0/24 103.15.196.0/22
103.15.197.0/24 103.15.196.0/22
103.15.198.0/24 103.15.196.0/22
103.15.199.0/24 103.15.196.0/22
103.19.24.0/24 103.19.24.0/22
103.19.25.0/24 103.19.24.0/22
103.19.26.0/24 103.19.24.0/22
103.19.27.0/24 103.19.24.0/22
162.247.0.0/24 162.247.0.0/22
162.247.1.0/24 162.247.0.0/22
162.247.2.0/24 162.247.0.0/22
162.247.3.0/24 162.247.0.0/22
203.90.224.0/22 203.90.224.0/19
203.90.224.0/24 203.90.224.0/19
203.90.225.0/24 203.90.224.0/19
203.90.226.0/24 203.90.224.0/19
203.90.227.0/24 203.90.224.0/19
203.90.228.0/23 203.90.224.0/19
203.90.228.0/24 203.90.224.0/19
203.90.229.0/24 203.90.224.0/19
203.90.230.0/24 203.90.224.0/19
203.90.254.0/24 203.90.224.0/19
203.135.128.0/24 203.135.128.0/19
203.135.129.0/24 203.135.128.0/19
203.135.130.0/24 203.135.128.0/19
203.135.131.0/24 203.135.128.0/19
203.135.132.0/24 203.135.128.0/19
203.135.133.0/24 203.135.128.0/19
203.135.134.0/24 203.135.128.0/19
203.135.135.0/24 203.135.128.0/19
203.135.136.0/24 203.135.128.0/19
203.135.137.0/24 203.135.128.0/19
203.135.138.0/24 203.135.128.0/19
203.135.139.0/24 203.135.128.0/19
203.135.140.0/24 203.135.128.0/19
203.135.141.0/24 203.135.128.0/19
203.135.142.0/24 203.135.128.0/19
203.135.143.0/24 203.135.128.0/19
203.135.145.0/24 203.135.128.0/19
203.135.146.0/24 203.135.128.0/19
203.135.147.0/24 203.135.128.0/19
203.135.148.0/24 203.135.128.0/19
203.135.149.0/24 203.135.128.0/19
203.135.150.0/24 203.135.128.0/19
203.135.151.0/24 203.135.128.0/19
203.135.152.0/24 203.135.128.0/19
203.135.153.0/24 203.135.128.0/19
203.135.154.0/24 203.135.128.0/19
203.135.155.0/24 203.135.128.0/19
203.135.156.0/24 203.135.128.0/19
203.135.157.0/24 203.135.128.0/19
203.135.158.0/24 203.135.128.0/19
203.135.159.0/24 203.135.128.0/19
103.172.134.0/24 103.172.134.0/23
103.172.135.0/24 103.172.134.0/23
Prefixes added and withdrawn by this origin AS in the past 7 days.
+ 45.121.192.0/21 Announced
+ 103.19.24.0/22 Announced
+ 162.247.0.0/22 Announced
+ 203.90.224.0/22 Announced
+ 203.90.228.0/23 Announced
+ 203.135.128.0/19 Announced
+ 203.135.152.0/24 Announced
- 103.172.134.0/24 Withdrawn
- 103.172.135.0/24 Withdrawn
whois: 402603
IANA has recorded AS23881 as originally allocated by
/usr/bin/whois -h jwhois.apnic.netr "AS23881\n % [whois.apnic.net]
% Whois data copyright terms http://www.apnic.net/db/dbcopyright.html
% Information related to 'AS23552 - AS24575'
as-block: AS23552 - AS24575
descr: APNIC ASN block
remarks: These AS numbers are further assigned by APNIC
remarks: to APNIC members and end-users in the APNIC region
remarks: AS23889 has been transfered to AfriNIC
admin-c: HM20-AP
tech-c: HM20-AP
mnt-by: APNIC-HM
mnt-lower: APNIC-HM
last-modified: 2009-09-29T06:04:16Z
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 'AS23854 - AS23944'
as-block: AS23854 - AS23944
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: 2008-09-04T06:40:26Z
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 'AS23881'
% Abuse contact for 'AS23881' is 'report_abuse@udomain.hk'
aut-num: AS23881
as-name: UDOMAIN-AS-AP
descr: UDomain Web Hosting Company Ltd
descr: Hong Kong
country: HK
import: from AS7540 action pref=100; accept ANY
import: from AS2914 action pref=100; accept ANY
export: to AS7540 announce AS23881
export: to AS2914 announce AS23881
export: to AS-ANY announce AS23881
org: ORG-UWHC1-AP
admin-c: UA32-AP
tech-c: UA32-AP
abuse-c: AU97-AP
mnt-lower: MAINT-HK-UDOMAIN
mnt-routes: MAINT-HK-UDOMAIN
mnt-by: APNIC-HM
mnt-irt: IRT-UDOMAIN-HK
last-modified: 2020-06-15T01:32:17Z
source: APNIC
irt: IRT-UDOMAIN-HK
address: 18/F, Kinox Centre, 9 Hung To Road, Hong Kong
address: Hong Kong
e-mail: report_abuse@udomain.hk
abuse-mailbox: report_abuse@udomain.hk
admin-c: UA32-AP
tech-c: UA32-AP
auth: # Filtered
remarks: report_abuse@udomain.hk is invalid
mnt-by: MAINT-HK-UDOMAIN
last-modified: 2026-03-25T13:11:03Z
source: APNIC
organisation: ORG-UWHC1-AP
org-name: UDomain Web Hosting Company Limited
org-type: LIR
country: HK
address: 18/F,
address: Kinox Centre,
address: 9 Hung To Road,
address: Kwun Tong, Kowloon.
phone: +852-2554-7545
fax-no: +852-2554-7900
e-mail: noc@udomain.hk
mnt-ref: APNIC-HM
mnt-by: APNIC-HM
last-modified: 2023-09-05T02:14:57Z
source: APNIC
role: ABUSE UDOMAINHK
country: ZZ
address: 18/F, Kinox Centre, 9 Hung To Road, Hong Kong
address: Hong Kong
phone: +000000000
e-mail: report_abuse@udomain.hk
admin-c: UA32-AP
tech-c: UA32-AP
nic-hdl: AU97-AP
remarks: Generated from irt object IRT-UDOMAIN-HK
remarks: report_abuse@udomain.hk is invalid
abuse-mailbox: report_abuse@udomain.hk
mnt-by: APNIC-ABUSE
last-modified: 2026-03-25T13:12:09Z
source: APNIC
role: UDOMAIN ADMINISTRATORS
address: Unit A - D, 6th Floor, Wing Cheung Industrial Building, No. 109 How Ming Street, Kwun Tong, Kowloon
country: HK
phone: +852 2554 7545
e-mail: noc@udomain.hk
admin-c: UN22-AP
tech-c: UN22-AP
nic-hdl: UA32-AP
mnt-by: MAINT-HK-UDOMAIN
last-modified: 2017-10-16T08:26:03Z
source: APNIC
% This query was served by the APNIC Whois Service version 1.88.48 (WHOIS-AU5)