45.121.203.0/24

AS23881 · UDomain Web Hosting Company Ltd

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Summary

Country	Hong Kong
Domain	udomain.hk
ASN	AS23881
Registry	APNIC
ID	UDOMAIN-HK

WHOIS Details

inetnum:        45.121.203.0 - 45.121.203.255
netname:        UDOMAIN-HK
descr:          UDomain Web Hosting Company Ltd
country:        HK
admin-c:        NA724-AP
tech-c:         NA724-AP
abuse-c:        AU302-AP
status:         ALLOCATED NON-PORTABLE
mnt-by:         MAINT-NEWSKY-AP
mnt-irt:        IRT-UDOMAIN-HK1
last-modified:  2022-01-05T13:14:16Z
source:         APNIC

irt:            IRT-UDOMAIN-HK1
address:        Unit A - D, 6th Floor,Wing Cheung Industrial Building, No. 109 How Ming Street, Kwun Tong, Kowloon.
e-mail:         support@udomain.com.hk
abuse-mailbox:  support@udomain.com.hk
admin-c:        NA724-AP
tech-c:         NA724-AP
auth:           # Filtered
remarks:        support@udomain.com.hk is invalid
mnt-by:         MAINT-NEWSKY-AP
last-modified:  2025-08-22T22:56:41Z
source:         APNIC

role:           ABUSE UDOMAINHK1
country:        ZZ
address:        Unit A - D, 6th Floor,Wing Cheung Industrial Building, No. 109 How Ming Street, Kwun Tong, Kowloon.
phone:          +000000000
e-mail:         support@udomain.com.hk
admin-c:        NA724-AP
tech-c:         NA724-AP
nic-hdl:        AU302-AP
remarks:        Generated from irt object IRT-UDOMAIN-HK1
remarks:        support@udomain.com.hk is invalid
abuse-mailbox:  support@udomain.com.hk
mnt-by:         APNIC-ABUSE
last-modified:  2025-08-22T22:58:59Z
source:         APNIC

role:           Network 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:        NO138-AP
tech-c:         NO138-AP
nic-hdl:        NA724-AP
mnt-by:         MAINT-NEWSKY-AP
last-modified:  2019-06-17T09:29:05Z
source:         APNIC

route:          45.121.203.0/24
origin:         AS23881
descr:          New Sky Internet Limited Unit A-D, 6th Floor, Wing Cheung Industrial Building, No. 109 How Ming Street,
mnt-by:         MAINT-NEWSKY-AP
last-modified:  2019-07-15T04:12:23Z
source:         APNIC

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

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Useful for Cybersecurity

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Pingable IPs

No IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.

IP Address	ASN	Details
3.146.143.56	AS16509 Amazon.com, Inc.	`0.16ms` from Columbus, US
132.160.71.120	AS6360 University of Hawaii	`11.13ms` from Honolulu, US
41.220.167.40	AS30619 TMCEL - Moçambique Telecom, SA	`16.86ms` from Johannesburg, ZA
45.221.110.232	AS40065 CNSERVERS LLC	`0.25ms` from Los Angeles, US
37.223.254.24	AS12430 VODAFONE ESPANA S.A.U.	`2.63ms` from Madrid, ES
83.35.210.120	AS3352 TELEFONICA DE ESPANA S.A.U.	`12.79ms` from Madrid, ES
2.37.184.200	AS30722 Vodafone Italia S.p.A.	`15.44ms` from Milan, IT
82.54.140.72	AS3269 Telecom Italia S.p.A.	`1.94ms` from Milan, IT
119.239.213.232	AS2518 BIGLOBE Inc.	`19.36ms` from Osaka, JP
177.184.159.8	AS263587 SOS TELECOM	`18.79ms` from Osasco, BR
52.104.139.8	AS8075 Microsoft Corporation	`0.42ms` from Quincy, US
44.194.215.40	AS14618 Amazon.com, Inc.	`0.16ms` from Reston, US
189.181.41.232	AS8151 UNINET	`5.73ms` from Santiago de Queretaro, MX
121.191.23.168	AS4766 Korea Telecom	`3.02ms` from Seoul, KR
1.169.170.248	AS3462 Data Communication Business Group	`1.53ms` from Taipei, TW
60.1.148.184	AS4837 CHINA UNICOM China169 Backbone	`7.39ms` from Beijing, CN
186.214.155.8	AS18881 TELEFÔNICA BRASIL S.A	`13.72ms` from Belo Horizonte, BR
24.25.19.120	AS11426 Charter Communications Inc	`6.51ms` from Charlotte, US
217.228.189.104	AS3320 Deutsche Telekom AG	`3.29ms` from Duesseldorf, DE
43.136.91.88	AS45090 Shenzhen Tencent Computer Systems Company Limited	`1.92ms` from Guangzhou, CN
142.251.126.104	AS15169 Google LLC	`0.09ms` from Mumbai, IN
52.67.118.216	AS16509 Amazon.com, Inc.	`0.13ms` from Osasco, BR
34.106.56.72	AS396982 Google LLC	`0.12ms` from Salt Lake City, US
34.176.183.40	AS396982 Google LLC	`0.10ms` from Santiago, CL
73.75.213.72	AS7922 Comcast Cable Communications, LLC	`4.80ms` from Chicago, US

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.

traceroute -a -n -q1 -m7 45.121.203.80

traceroute to 45.121.203.80 (45.121.203.80): 7 hops max, 52 byte packets

1 [AS15169] 72.14.239.92 1.105 ms

2 *

3 [AS9304] 218.189.5.25 2.682 ms

4 [AS9304] 218.189.31.154 2.808 ms

5 *

6 *

7 *

Measurement taken from

IPinfo ProbeNet in Hong Kong, HK

On August 28th 2025

What are IP address ranges?

IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.

Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.

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