121.203.16.0/20

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 121.203.16.0/20

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
23.109.240.228 AS7979 Servers.com, Inc. 0.20ms from Amsterdam, NL
83.198.218.196 AS3215 Orange S.A. 17.90ms from Antananarivo, MG
164.223.246.132 AS89 Navy Network Information Center (NNIC) 2.66ms from Ashburn, US
122.138.104.116 AS4837 CHINA UNICOM China169 Backbone 7.71ms from Changchun, CN
80.135.103.52 AS3320 Deutsche Telekom AG 4.29ms from Duesseldorf, DE
168.4.182.36 AS8 Rice University 3.13ms from Houston, US
81.149.123.212 AS2856 British Telecommunications PLC 2.93ms from London, GB
123.103.169.20 AS7690 Mirai Communication Network Inc. 5.81ms from Osaka, JP
109.9.57.100 AS15557 Societe Francaise Du Radiotelephone - SFR SA 19.12ms from Paris, FR
94.97.100.164 AS25019 Saudi Telecom Company JSC 0.80ms from Riyadh, SA
108.255.195.132 AS7018 AT&T Enterprises, LLC 4.27ms from San Jose, US
13.48.123.36 AS16509 Amazon.com, Inc. 0.98ms from Stockholm, SE
89.79.201.36 AS9141 P4 Sp. z o.o. 13.18ms from Warsaw, PL
129.81.46.4 AS10349 Tulane University 12.70ms from Dallas, US
3.249.120.228 AS16509 Amazon.com, Inc. 0.18ms from Dublin, IE
3.254.51.212 AS16509 Amazon.com, Inc. 0.27ms from Dublin, IE
79.227.16.228 AS3320 Deutsche Telekom AG 7.43ms from Frankfurt am Main, DE
183.156.222.84 AS4134 CHINANET-BACKBONE 9.26ms from Huai'an, CN
88.6.206.100 AS3352 TELEFONICA DE ESPANA S.A.U. 7.89ms from Madrid, ES
52.7.222.244 AS14618 Amazon.com, Inc. 0.18ms from Reston, US
79.104.215.212 AS3216 PJSC Vimpelcom 0.49ms from Samara, RU
123.198.106.228 AS2527 Sony Network Communications Inc. 3.24ms from Tokyo, JP
195.141.52.52 AS6730 Sunrise GmbH 0.70ms from Zuerich, CH
77.164.146.148 AS1136 KPN B.V. 1.51ms from Amsterdam, NL
40.121.88.36 AS8075 Microsoft Corporation 0.40ms from Ashburn, US

Traceroute

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

$
traceroute -a -n -q1 -m6 121.203.23.6
traceroute to 121.203.23.6 (121.203.23.6): 6 hops max, 52 byte packets
1 [AS15169] 72.14.239.92 184.937 ms
2 *
3 [AS17924] 203.78.42.167 181.007 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.

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