121.203.120.0/21

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:         abuse@ismart.net
abuse-mailbox:  abuse@ismart.net
admin-c:        JY50-AP
tech-c:         EN211-AP
auth:           # Filtered
remarks:        abuse@ismart.net 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:         abuse@ismart.net
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:         abuse@ismart.net
admin-c:        JY50-AP
tech-c:         EN211-AP
nic-hdl:        AS2092-AP
remarks:        Generated from irt object IRT-SMARTMOBILE-HK
remarks:        abuse@ismart.net was validated on 2025-08-27
abuse-mailbox:  abuse@ismart.net
mnt-by:         APNIC-ABUSE
last-modified:  2025-08-27T00:45:01Z
source:         APNIC

person:         Eric Chan
nic-hdl:        EC9-AP
e-mail:         ericchan@ismart.net
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:         johnnyyeung@ismart.net
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 121.203.120.0/21

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
203.151.26.245 AS4618 Internet Thailand Company Limited 2.66ms from Bangkok, TH
194.78.101.117 AS5432 Proximus NV 1.29ms from Brussels, BE
113.241.148.213 AS4134 CHINANET-BACKBONE 11.43ms from Chenzhou, CN
187.54.192.197 AS8167 V tal 18.44ms from Curitiba, BR
91.2.234.53 AS3320 Deutsche Telekom AG 1.54ms from Duesseldorf, DE
175.210.126.69 AS4766 Korea Telecom 0.73ms from Incheon, KR
149.90.55.181 AS12353 Vodafone Portugal 7.21ms from Lisbon, PT
79.169.203.69 AS2860 NOS COMUNICACOES, S.A. 7.89ms from Lisbon, PT
81.23.61.245 AS41230 ASK4 Limited 0.20ms from London, GB
156.245.100.69 AS398823 PEG TECH INC 0.32ms from Los Angeles, US
181.217.40.37 AS28573 Claro NXT Telecomunicacoes Ltda 4.45ms from Sao Paulo, BR
24.108.25.213 AS6327 Shaw Communications 14.49ms from Seattle, US
61.84.9.181 AS4766 Korea Telecom 1.73ms from Seoul, KR
120.101.205.149 AS1659 Taiwan Academic Network (TANet) Information Center 3.34ms from Taipei, TW
125.103.99.133 AS17506 ARTERIA Networks Corporation 0.69ms from Tokyo, JP
195.21.55.229 AS3257 GTT Communications Inc. 0.26ms from Amsterdam, NL
71.206.19.69 AS7922 Comcast Cable Communications, LLC 8.60ms from Ashburn, US
102.177.85.21 AS327900 Simply Computers Tanzania Ltd 1.06ms from Dar es Salaam, TZ
136.199.57.53 AS2857 Johannes Gutenberg-Universitaet Mainz 3.47ms from Frankfurt am Main, DE
217.250.69.149 AS3320 Deutsche Telekom AG 2.33ms from Frankfurt am Main, DE
190.149.6.245 AS14754 TELECOMUNICACIONES DE GUATEMALA, SOCIEDAD ANONIMA 1.56ms from Guatemala City, GT
93.241.87.149 AS3320 Deutsche Telekom AG 3.53ms from Hamburg, DE
195.218.209.213 AS3216 PJSC Vimpelcom 9.30ms from Moscow, RU
157.254.111.213 AS9009 M247 Europe SRL 0.37ms from New York City, US
115.230.56.229 AS4134 CHINANET-BACKBONE 10.91ms from Ningbo, CN

Traceroute

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

$
traceroute -a -n -q1 -m5 121.203.123.3
traceroute to 121.203.123.3 (121.203.123.3): 5 hops max, 52 byte packets
3 *
4 *
5 *
Measurement taken from IPinfo ProbeNet in Cardiff, GB
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.

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