121.203.72.0/21

AS17924  ·  SmarTone Mobile Communications Ltd

Need more data or want to access it via API or data downloads? Sign up to get free access

Sign up for free ›

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 121.203.72.0/21

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

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
23.249.238.37 AS57795 NG-BLU Networks B.V. 0.27ms from Amsterdam, NL
75.196.113.213 AS6167 Verizon Business 12.72ms from Chicago, US
73.70.121.133 AS7922 Comcast Cable Communications, LLC 5.26ms from Fremont, US
220.178.87.197 AS4134 CHINANET-BACKBONE 6.00ms from Huai'an, CN
202.138.249.53 AS9657 Melsa-i-net AS 3.25ms from Jakarta, ID
95.37.175.245 AS12389 PJSC Rostelecom 5.93ms from Kazan, RU
197.249.21.5 AS25139 TVCABO - Comunicacoes Multimedia, Lda 1.04ms from Maputo, MZ
108.190.133.181 AS33363 Charter Communications, Inc 9.15ms from Miami, US
187.23.151.21 AS28573 Claro NXT Telecomunicacoes Ltda 9.35ms from Porto Alegre, BR
121.139.206.21 AS4766 Korea Telecom 1.66ms from Seoul, KR
186.238.22.21 AS10429 TELEFÔNICA BRASIL S.A 0.77ms from São Paulo, BR
79.129.121.213 AS6799 Ote SA (Hellenic Telecommunications Organisation) 1.17ms from Athens, GR
80.128.37.37 AS3320 Deutsche Telekom AG 3.82ms from Berlin, DE
122.252.234.69 AS24186 RailTel Corporation of India Ltd 1.58ms from Delhi, IN
154.89.5.149 AS21859 Zenlayer Inc 0.48ms from Ho Chi Minh City, VN
47.56.24.85 AS45102 Alibaba (US) Technology Co., Ltd. 1.51ms from Hong Kong, HK
119.236.117.245 AS4760 HKT Limited 5.10ms from Hong Kong, HK
76.93.203.165 AS20001 Charter Communications Inc 6.83ms from Honolulu, US
18.154.11.149 AS16509 Amazon.com, Inc. 0.78ms from Jakarta, ID
64.58.165.245 AS22773 Cox Communications Inc. 1.81ms from Los Angeles, US
62.86.7.117 AS3269 Telecom Italia S.p.A. 0.56ms from Milan, IT
78.41.178.5 AS43521 Recom LLC 6.71ms from Moscow, RU
216.153.77.21 AS2527 Sony Network Communications Inc. 4.00ms from Osaka, JP
74.125.114.229 AS15169 Google LLC 0.15ms from Oudeschip, NL
34.155.124.229 AS396982 Google LLC 0.12ms from Paris, FR

Traceroute

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

$
traceroute -a -n -q1 -m6 121.203.72.69
traceroute to 121.203.72.69 (121.203.72.69): 6 hops max, 52 byte packets
2 *
4 *
5 *
6 *
Measurement taken from IPinfo ProbeNet in Hong Kong, HK
On

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.

An API built with users in mind: reliable, accurate, and easy-to-use

Discover why industry-leading companies around the globe love our data. IPinfo's accurate insights fuel use cases from cybersecurity, data enrichment, web personalization, and much more.

IPinfo for all your IP geolocation needs

Our IP tools

Explore all tools
What is my IP

What is my IP

Test our data accuracy by viewing insights from your IP address.

See your IP address
Map IPs

Map IPs

Paste up to 500,000 IPs to see where they're located on a map.

Try Map IPs
Summarize IPs

Summarize IPs

Use our data visualization tool to create a visual overview of multiple IPs.

Try Summarize IPs