121.203.244.0/24

AS17924 · SmarTone Mobile Communications Ltd

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Summary

Country	Hong Kong
Domain	smartone.com
ASN	AS17924
Parent Range	121.202.0.0/15
Registry	APNIC
ID	SMARTONE-MB

WHOIS Details

inetnum:        121.202.0.0 - 121.203.255.255
netname:        SMARTONE-MB
descr:          SmarTone Mobile Communications Ltd
descr:          Hong Kong
country:        HK
org:            ORG-SMCL2-AP
admin-c:        JY50-AP
tech-c:         EC9-AP
abuse-c:        AS2092-AP
status:         ALLOCATED PORTABLE
remarks:        --------------------------------------------------------
remarks:        To report network abuse, please contact mnt-irt
remarks:        For troubleshooting, please contact tech-c and admin-c
remarks:        Report invalid contact via www.apnic.net/invalidcontact
remarks:        --------------------------------------------------------
mnt-by:         APNIC-HM
mnt-lower:      MAINT-HK-SMARTM-AP
mnt-routes:     MAINT-HK-SMARTM-AP
mnt-irt:        IRT-SMARTMOBILE-HK
last-modified:  2020-05-16T06:32:37Z
source:         APNIC

irt:            IRT-SMARTMOBILE-HK
address:        31/F, Millennium City 2,
address:        378 Kwun Tong Road, Kwun Tong,
address:        Kowloon, Hong Kong
e-mail:         [email protected]
abuse-mailbox:  [email protected]
admin-c:        JY50-AP
tech-c:         EN211-AP
auth:           # Filtered
remarks:        [email protected] was validated on 2025-08-27
mnt-by:         MAINT-HK-SMARTM-AP
last-modified:  2025-11-17T23:08:35Z
source:         APNIC

organisation:   ORG-SMCL2-AP
org-name:       Smartone Mobile communications Limited
org-type:       LIR
country:        HK
address:        31 / F , Millennium City 2
address:        378 Kwun Tong Road, Kwun Tong, Kowloon
phone:          +852-31282828
fax-no:         +852-25976556
e-mail:         [email protected]
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2023-09-05T02:14:50Z
source:         APNIC

role:           ABUSE SMARTMOBILEHK
country:        ZZ
address:        31/F, Millennium City 2,
address:        378 Kwun Tong Road, Kwun Tong,
address:        Kowloon, Hong Kong
phone:          +000000000
e-mail:         [email protected]
admin-c:        JY50-AP
tech-c:         EN211-AP
nic-hdl:        AS2092-AP
remarks:        Generated from irt object IRT-SMARTMOBILE-HK
remarks:        [email protected] was validated on 2025-08-27
abuse-mailbox:  [email protected]
mnt-by:         APNIC-ABUSE
last-modified:  2025-08-27T00:45:01Z
source:         APNIC

person:         Eric Chan
nic-hdl:        EC9-AP
e-mail:         [email protected]
address:        31/F,Millennium City 2,
address:        378 Kwun Tong Road, Kwun Tong,
address:        Kowloon, Hong Kong
phone:          +852-31282298
fax-no:         +852-21683089
country:        HK
mnt-by:         MAINT-HK-EC9-AP
last-modified:  2009-12-09T10:21:18Z
source:         APNIC

person:         Johnny Yeung
nic-hdl:        JY50-AP
e-mail:         [email protected]
address:        31/F, Millennium City 2,
address:        378 Kwun Tong Road, Kwun Tong,
address:        Kowloon, Hong Kong
phone:          +852-28802618
fax-no:         +852-21683089
country:        HK
mnt-by:         MAINT-HK-JY50-AP
last-modified:  2009-12-09T08:10:00Z
source:         APNIC

route:          121.202.0.0/15
origin:         AS17924
descr:          Smartone Mobile communications Limited 31 / F , Millennium City 2 378 Kwun Tong Road, Kwun Tong, Kowloon
mnt-by:         MAINT-HK-SMARTM-AP
last-modified:  2021-04-22T07:22:28Z
source:         APNIC

Overlapping Ranges

BGP prefixes that contain 121.203.244.0/24

Range	ASN	Company	Num of IPs
121.202.0.0/15	AS17924	SmarTone Mobile Communications Ltd	131,072

Nearby Ranges

BGP prefixes that overlap with 121.203.0.0/16

Range	ASN	Company	Num of IPs
121.202.0.0/15	AS17924	SmarTone Mobile Communications Ltd	131,072

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

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

IP Address	ASN	Details
121.203.244.3	AS17924 SmarTone Mobile Communications Ltd	`2.27ms` 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
77.175.175.200	AS1136 KPN B.V.	`1.61ms` from Amsterdam, NL
35.84.163.120	AS16509 Amazon.com, Inc.	`0.16ms` from Boardman, US
119.52.206.120	AS4837 CHINA UNICOM China169 Backbone	`6.33ms` from Changchun, CN
113.205.113.216	AS4837 CHINA UNICOM China169 Backbone	`2.01ms` from Chongqing, CN
62.171.177.72	AS51167 Contabo GmbH	`0.25ms` from Lauterbourg, FR
163.5.60.184	AS61317 Hivelocity LLC	`0.48ms` from Milan, IT
221.6.162.8	AS4837 CHINA UNICOM China169 Backbone	`3.30ms` from Nanjing, CN
80.145.75.232	AS3320 Deutsche Telekom AG	`2.83ms` from Nuernberg, DE
162.241.24.120	AS31898 Oracle Corporation	`0.23ms` from Phoenix, US
166.144.251.136	AS6167 Verizon Business	`10.74ms` from San Jose, US
77.164.179.72	AS1136 KPN B.V.	`1.03ms` from Amsterdam, NL
24.243.199.56	AS11427 Charter Communications Inc	`4.45ms` from Dallas, US
84.172.121.120	AS3320 Deutsche Telekom AG	`8.10ms` from Frankfurt am Main, DE
171.239.87.120	AS7552 Viettel Group	`2.01ms` from Ho Chi Minh City, VN
18.100.218.136	AS16509 Amazon.com, Inc.	`5.66ms` from Madrid, ES
85.251.181.200	AS6739 VODAFONE ONO, S.A.	`9.85ms` from Madrid, ES
75.73.94.40	AS7922 Comcast Cable Communications, LLC	`2.95ms` from Minneapolis, US
95.79.64.184	AS42682 JSC ER-Telecom Holding	`6.86ms` from Moscow, RU
126.23.245.168	AS17676 SoftBank Corp.	`3.64ms` from Osaka, JP
177.81.53.216	AS28573 Claro NXT Telecomunicacoes Ltda	`5.15ms` from Osasco, BR
181.197.88.216	AS18809 Cable Onda	`14.32ms` from Panama, PA
210.146.139.232	AS2519 ARTERIA Networks Corporation	`2.28ms` from Tokyo, JP
52.105.167.168	AS8075 Microsoft Corporation	`0.24ms` from Warsaw, PL
178.175.180.104	AS208545 sector7 GmbH	`5.04ms` from Amsterdam, NL
39.106.160.232	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`1.29ms` from Beijing, CN

Traceroute

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

traceroute -a -n -q1 -f2 121.203.244.3

traceroute to 121.203.244.3 (121.203.244.3): 64 hops max, 52 byte packets

2 [AS63473] 103.73.67.2 0.29 ms

3 *

4 [] 103.203.158.175 1.45 ms

5 [AS9304] 218.189.5.21 1.489 ms

6 [AS9304] 218.189.25.230 1.817 ms

7 [AS17924] 203.78.42.165 1.73 ms

8 [AS17924] 203.78.42.65 1.72 ms

9 [AS17924] 121.203.244.3 2.658 ms

Measurement taken from

IPinfo ProbeNet in Hong Kong, HK

On January 30th 2026

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.

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