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	`2.17ms` 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
12.49.240.136	AS7018 AT&T Enterprises, LLC	`1.50ms` from Ashburn, US
92.245.114.56	AS41750 Mega-Line Ltd.	`0.50ms` from Bishkek, KG
186.154.18.104	AS19429 ETB - Colombia	`1.29ms` from Bogota, CO
80.209.254.104	AS209820 Bitwise Ops SRL	`0.36ms` from Bucharest, RO
139.210.210.88	AS4837 CHINA UNICOM China169 Backbone	`2.90ms` from Changchun, CN
67.249.68.88	AS11351 Charter Communications Inc	`19.02ms` from Chicago, US
170.119.132.136	AS19273 Louisville Gas & Electric	`13.04ms` from Cincinnati, US
36.133.130.88	AS9808 China Mobile Communications Group Co., Ltd.	`0.39ms` from Jinan, CN
41.132.11.8	AS20011 Dimension Data	`1.75ms` from Johannesburg, ZA
105.172.232.168	AS37119 UNITEL SA	`1.31ms` from Luanda, AO
18.100.218.136	AS16509 Amazon.com, Inc.	`5.65ms` from Madrid, ES
54.233.116.184	AS16509 Amazon.com, Inc.	`0.15ms` from Osasco, BR
5.49.242.136	AS5410 Bouygues Telecom SA	`12.14ms` from Paris, FR
118.37.207.120	AS4766 Korea Telecom	`1.45ms` from Seoul, KR
183.191.162.56	AS4837 CHINA UNICOM China169 Backbone	`3.02ms` from Taiyuan, CN
51.16.11.24	AS16509 Amazon.com, Inc.	`1.71ms` from Tel Aviv, IL
20.220.184.88	AS8075 Microsoft Corporation	`0.18ms` from Toronto, CA
99.246.207.200	AS812 Rogers Communications Canada Inc.	`3.34ms` from Toronto, CA
54.202.240.56	AS16509 Amazon.com, Inc.	`0.17ms` from Boardman, US
80.153.254.120	AS3320 Deutsche Telekom AG	`7.73ms` from Frankfurt am Main, DE
37.196.146.8	AS1257 Tele2 Sverige AB	`0.46ms` from Goeteborg, SE
203.177.57.120	AS4775 Globe Telecoms	`0.74ms` from Hong Kong, HK
115.64.215.248	AS7545 TPG Telecom Limited	`12.72ms` from Melbourne, AU
66.176.34.136	AS7922 Comcast Cable Communications, LLC	`9.46ms` from Miami, US
74.73.161.104	AS12271 Charter Communications Inc	`4.00ms` from New York City, US

Traceroute

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

traceroute -a -n -q1 121.203.244.3

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

1 [AS9312] 45.128.220.1 36.15 ms

2 [AS9312] 45.90.209.32 11.328 ms

3 [AS9312] 103.193.131.89 0.477 ms

4 [AS7578] 31.217.251.82 0.313 ms

5 [] 103.203.158.175 30.213 ms

6 [AS9304] 218.189.5.53 32.838 ms

7 [AS9304] 218.189.25.230 5.008 ms

8 [AS17924] 203.78.42.165 1.814 ms

9 [AS17924] 203.78.42.65 1.609 ms

10 [AS17924] 121.203.244.3 2.065 ms

Measurement taken from

IPinfo ProbeNet in Hong Kong, HK

On November 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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