121.203.0.0/20

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:         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:  2025-09-04T05:16:36Z
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 121.203.0.0/20

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
94.56.33.196 AS5384 Emirates Internet 2.96ms from Al Fujairah City, AE
84.82.26.212 AS1136 KPN B.V. 1.69ms from Amsterdam, NL
111.123.136.244 AS4134 CHINANET-BACKBONE 6.06ms from Guiyang, CN
172.113.196.68 AS20001 Charter Communications Inc 7.28ms from Los Angeles, US
176.139.185.84 AS5410 Bouygues Telecom SA 7.03ms from Marseille, FR
80.180.168.196 AS3269 Telecom Italia S.p.A. 5.75ms from Milan, IT
58.70.198.228 AS17511 OPTAGE Inc. 2.40ms from Osaka, JP
54.211.75.4 AS14618 Amazon.com, Inc. 0.21ms from Reston, US
158.38.142.116 AS224 SIKT - KUNNSKAPSSEKTORENS TJENESTELEVERANDOR 13.20ms from Sandefjord, NO
177.139.196.52 AS27699 TELEFÔNICA BRASIL S.A 2.92ms from Sao Paulo, BR
59.29.158.228 AS4766 Korea Telecom 2.68ms from Seoul, KR
169.212.132.36 AS4766 Korea Telecom 7.59ms from Seoul, KR
24.150.169.116 AS7992 Cogeco Connexion Inc. 5.63ms from Toronto, CA
104.25.31.164 AS13335 Cloudflare, Inc. 0.12ms from Yerevan, AM
4.157.113.20 AS8075 Microsoft Corporation 0.36ms from Ashburn, US
75.138.85.36 AS20115 Charter Communications LLC 8.03ms from Atlanta, US
104.79.35.196 AS16625 Akamai Technologies, Inc. 0.34ms from Berlin, DE
152.110.43.164 AS20011 Dimension Data 1.83ms from Cape Town, ZA
71.129.158.36 AS7018 AT&T Enterprises, LLC 6.47ms from Chicago, US
109.56.118.196 AS44034 Hi3G Access AB 5.98ms from Copenhagen, DK
68.51.171.164 AS7922 Comcast Cable Communications, LLC 7.64ms from Flint, US
179.54.102.244 AS26615 TIM S/A 15.01ms from Fortaleza, BR
154.56.100.84 AS174 Cogent Communications, LLC 1.25ms from Frankfurt am Main, DE
98.47.37.132 AS7922 Comcast Cable Communications, LLC 10.22ms from Fremont, US
77.218.56.148 AS1257 Tele2 Sverige AB 1.06ms from Goeteborg, SE

Traceroute

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

$
traceroute -a -n -q1 -m6 121.203.5.235
traceroute to 121.203.5.235 (121.203.5.235): 6 hops max, 52 byte packets
1 [AS15169] 72.14.236.39 187.679 ms
2 *
3 [AS17924] 203.78.42.168 185.32 ms
4 *
5 *
6 *
Measurement taken from IPinfo ProbeNet in Toronto, CA
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