45.121.199.0/24

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:        45.121.199.0 - 45.121.199.255
netname:        UDOMAIN-HK
descr:          UDomain Web Hosting Company Ltd
country:        HK
admin-c:        NA725-AP
tech-c:         NA725-AP
abuse-c:        AU303-AP
status:         ALLOCATED NON-PORTABLE
mnt-by:         MAINT-HK-WEBHOST
mnt-irt:        IRT-UDOMAIN-HK2
last-modified:  2022-01-05T13:14:17Z
source:         APNIC

irt:            IRT-UDOMAIN-HK2
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:        NA725-AP
tech-c:         NA725-AP
auth:           # Filtered
remarks:        support@udomain.com.hk is invalid
mnt-by:         MAINT-HK-WEBHOST
last-modified:  2025-11-18T00:30:25Z
source:         APNIC

role:           ABUSE UDOMAINHK2
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:        NA725-AP
tech-c:         NA725-AP
nic-hdl:        AU303-AP
remarks:        Generated from irt object IRT-UDOMAIN-HK2
remarks:        support@udomain.com.hk is invalid
abuse-mailbox:  support@udomain.com.hk
mnt-by:         APNIC-ABUSE
last-modified:  2025-08-22T22:58:58Z
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:        NO139-AP
tech-c:         NO139-AP
nic-hdl:        NA725-AP
mnt-by:         MAINT-HK-WEBHOST
last-modified:  2019-06-17T09:55:57Z
source:         APNIC

route:          45.121.199.0/24
origin:         AS23881
descr:          Web Host Ltd Unit A-D, 6th Floor, Wing Cheung Industrial Building, No. 109 How Ming Street, Kwun Tong, Kowloon.
mnt-by:         MAINT-HK-WEBHOST
last-modified:  2019-07-15T04:08:58Z
source:         APNIC

Nearby Ranges

BGP prefixes that overlap with 45.121.0.0/16

Range	ASN	Company	Num of IPs
45.121.80.0/22	AS153494	UNIT 04 7/F BRIGHT WAY TOWER	1,024
45.121.84.0/22	AS18106	Viewqwest Pte Ltd	1,024
45.121.132.0/22	AS1851	Adelaide University	1,024
45.121.32.0/22	AS136908	Sky Broadband Pvt. Ltd	1,024
45.121.0.0/22	AS24186	RailTel Corporation is an Internet Service Provider.	1,024
45.121.148.0/22	AS2516	Mainz, LLC	1,024
45.121.48.0/22	AS31972	Xiang Ao Communications Co. Ltd.	1,024
45.121.36.0/22	AS45960	YTL Broadband Sdn. Bhd.	1,024
45.121.24.0/22	AS131429	Mobifone Corporation	1,024
45.121.236.0/22	AS132590	AKCTV Pte. Ltd.	1,024
45.121.160.0/22	AS56149	INCOM Company	1,024
45.121.20.0/22	AS56231	MEASAT Broadcast Network Systems Sdn. Bhd.	1,024
45.121.108.0/22	AS135214	THE SPEEDNET	1,024
45.121.56.0/22	AS153494	UNIT 17, 9TH FL OF TOWER A New,	1,024
45.121.104.0/22	AS12975	Palestine Telecommunications Company (PALTEL)	1,024
45.121.201.0/24	AS23881	UDomain Web Hosting Company Ltd	256
45.121.203.0/24	AS23881	UDomain Web Hosting Company Ltd	256
45.121.52.0/24	AS4847	Beijing Guanghuan newsletter network communication technology limited liability company	256
45.121.55.0/24	AS4847	Beijing Guanghuan newsletter network communication technology limited liability company	256
45.121.212.0/24	AS62610	Graha Telkomsigma	256
45.121.213.0/24	AS62610	Menara AIMS, Changkat Raja Chulan, 50200 Kuala Lumpur, Malaysia	256
45.121.214.0/24	AS62610	StarkenburgstraÃŸe 12, 64546 MÃ¶rfelden, Germany	256
45.121.33.0/24	AS136908	Sky Broadband Pvt. Ltd.	256
45.121.34.0/24	AS136908	Sky Broadband Pvt. Ltd.	256
45.121.35.0/24	AS136908	Sky Broadband Pvt. Ltd.	256
45.121.208.0/24	AS137409	Streamline Servers Ltd - Perth	256
45.121.209.0/24	AS137409	Streamline Servers Ltd - Melbourne	256
45.121.210.0/24	AS137409	Streamline Servers Ltd - Sydney	256
45.121.211.0/24	AS137409	Streamline Servers Ltd - Sydney	256
45.121.192.0/24	AS23881	UDomain Web Hosting Company Ltd	256
45.121.194.0/24	AS23881	UDomain Web Hosting Company Ltd	256
45.121.196.0/24	AS23881	UDomain Web Hosting Company Ltd	256
45.121.197.0/24	AS23881	UDomain Web Hosting Company Ltd	256
45.121.198.0/24	AS23881	UDomain Web Hosting Company Ltd	256
45.121.200.0/24	AS23881	UDomain Web Hosting Company Ltd	256

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

Our Hosted Domains API, or Reverse IP API returns a full list of domains that are hosted on a single IP address.

Useful for Cybersecurity

Read more

Pingable IPs

131 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
45.121.199.55	AS23881 UDomain Web Hosting Company Ltd	`0.62ms` from Hong Kong, HK

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
20.67.118.104	AS8075 Microsoft Corporation	`0.24ms` from Amsterdam, NL
172.215.94.88	AS8075 Microsoft Corporation	`0.61ms` from Des Moines, US
193.234.68.24	AS8434 Telenor Sverige AB	`4.12ms` from Falkenberg, SE
93.239.5.72	AS3320 Deutsche Telekom AG	`2.91ms` from Frankfurt am Main, DE
87.156.55.56	AS3320 Deutsche Telekom AG	`5.25ms` from Frankfurt am Main, DE
74.161.118.56	AS8075 Microsoft Corporation	`0.20ms` from Kloten, CH
97.190.53.184	AS6167 Verizon Business	`12.04ms` from Los Angeles, US
93.57.73.216	AS12874 Fastweb SpA	`2.63ms` from Milan, IT
79.49.55.136	AS3269 Telecom Italia S.p.A.	`4.68ms` from Milan, IT
123.48.47.216	AS18126 Chubu Telecommunications Company, Inc.	`4.45ms` from Osaka, JP
189.241.107.152	AS8151 UNINET	`3.97ms` from Santiago de Queretaro, MX
177.35.174.8	AS28573 Claro NXT Telecomunicacoes Ltda	`1.64ms` from Sao Paulo, BR
203.206.235.120	AS4739 Internode Pty Ltd	`1.23ms` from Sydney, AU
3.144.221.136	AS16509 Amazon.com, Inc.	`0.67ms` from Columbus, US
101.70.153.40	AS4837 CHINA UNICOM China169 Backbone	`7.14ms` from Hangzhou, CN
106.71.146.216	AS4804 Microplex PTY LTD	`1.60ms` from Melbourne, AU
50.53.161.120	AS20055 Wholesail networks LLC	`2.98ms` from Portland, US
52.247.206.184	AS8075 Microsoft Corporation	`0.30ms` from Quincy, US
126.200.191.232	AS17676 SoftBank Corp.	`3.05ms` from Tokyo, JP
122.28.156.248	AS4713 NTT DOCOMO BUSINESS,Inc.	`1.06ms` from Tokyo, JP
80.191.198.200	AS58224 Iran Telecommunication Company PJS	`12.21ms` from Yerevan, AM
100.30.186.248	AS14618 Amazon.com, Inc.	`0.99ms` from Ashburn, US
3.88.104.104	AS14618 Amazon.com, Inc.	`0.66ms` from Ashburn, US
1.92.35.56	AS55990 Huawei Cloud Service data center	`14.32ms` from Beijing, CN
107.211.98.248	AS7018 AT&T Enterprises, LLC	`15.51ms` 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 -f5 45.121.199.190

traceroute to 45.121.199.190 (45.121.199.190): 64 hops max, 52 byte packets

5 [] 123.255.91.31 2.875 ms

6 *

7 *

8 [AS23881] 45.121.199.190 2.64 ms

Measurement taken from

IPinfo ProbeNet in Hong Kong, HK

On December 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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