121.203.128.0/18

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 121.203.128.0/18

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 4 domain names hosted across 4 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP
121.203.166.195 deliec.net 1
121.203.166.68 dhurrance.com 1
121.203.129.222 dtstudio.ltd 1
121.203.131.205 mylearnway.com 1

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

328 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
121.203.128.204 AS17924 SmarTone Mobile Communications Ltd 21.34ms from Hong Kong, HK
121.203.131.86 AS17924 SmarTone Mobile Communications Ltd 13.54ms from Hong Kong, HK
121.203.137.255 AS17924 SmarTone Mobile Communications Ltd 12.67ms from Hong Kong, HK
121.203.190.241 AS17924 SmarTone Mobile Communications Ltd 31.97ms from Hong Kong, HK
121.203.142.98 AS17924 SmarTone Mobile Communications Ltd 18.95ms from Hong Kong, HK
121.203.130.168 AS17924 SmarTone Mobile Communications Ltd 12.07ms from Hong Kong, HK
121.203.129.252 AS17924 SmarTone Mobile Communications Ltd 13.64ms from Hong Kong, HK
121.203.179.31 AS17924 SmarTone Mobile Communications Ltd 7.81ms from Hong Kong, HK
121.203.143.74 AS17924 SmarTone Mobile Communications Ltd 8.21ms from Hong Kong, HK
121.203.158.5 AS17924 SmarTone Mobile Communications Ltd 15.85ms from Hong Kong, HK
121.203.154.218 AS17924 SmarTone Mobile Communications Ltd 14.40ms from Hong Kong, HK
121.203.149.204 AS17924 SmarTone Mobile Communications Ltd 8.87ms from Hong Kong, HK
121.203.148.91 AS17924 SmarTone Mobile Communications Ltd 17.17ms from Hong Kong, HK
121.203.173.78 AS17924 SmarTone Mobile Communications Ltd 15.94ms from Hong Kong, HK
121.203.161.16 AS17924 SmarTone Mobile Communications Ltd 17.39ms from Hong Kong, HK
121.203.144.94 AS17924 SmarTone Mobile Communications Ltd 19.17ms from Hong Kong, HK
121.203.174.92 AS17924 SmarTone Mobile Communications Ltd 13.75ms from Hong Kong, HK
121.203.146.180 AS17924 SmarTone Mobile Communications Ltd 20.59ms from Hong Kong, HK
121.203.185.86 AS17924 SmarTone Mobile Communications Ltd 14.39ms from Hong Kong, HK
121.203.187.55 AS17924 SmarTone Mobile Communications Ltd 14.74ms from Hong Kong, HK
121.203.156.154 AS17924 SmarTone Mobile Communications Ltd 9.38ms from Hong Kong, HK
121.203.184.88 AS17924 SmarTone Mobile Communications Ltd 21.74ms from Hong Kong, HK
121.203.178.41 AS17924 SmarTone Mobile Communications Ltd 9.32ms from Hong Kong, HK
121.203.167.179 AS17924 SmarTone Mobile Communications Ltd 14.18ms from Hong Kong, HK
121.203.136.108 AS17924 SmarTone Mobile Communications Ltd 8.99ms 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
162.252.61.50 AS62754 REDI Net 2.55ms from Albuquerque, US
77.111.154.178 AS8462 Tarr Kft. 9.52ms from Budapest, HU
41.143.243.18 AS36903 Office National des Postes et Telecommunications ONPT (Maroc Telecom) / IAM 2.12ms from Casablanca, MA
68.11.149.2 AS22773 Cox Communications Inc. 11.43ms from Dallas, US
50.169.169.82 AS7922 Comcast Cable Communications, LLC 1.02ms from Denver, US
86.243.15.66 AS3215 Orange S.A. 4.98ms from Frankfurt am Main, DE
79.99.84.98 AS44225 Metaways Infosystems GmbH 8.80ms from Frankfurt am Main, DE
115.110.81.194 AS4755 TATA Communications formerly VSNL is Leading ISP 8.07ms from Indore, IN
103.168.64.50 AS132563 MegaHostZone 5.57ms from Kolkata, IN
75.31.66.18 AS7018 AT&T Enterprises, LLC 12.86ms from Miami, US
189.157.65.114 AS8151 UNINET 7.39ms from Monterrey, MX
3.226.144.82 AS14618 Amazon.com, Inc. 0.20ms from Reston, US
46.218.159.242 AS15557 Societe Francaise Du Radiotelephone - SFR SA 1.26ms from Saint-Denis, FR
201.203.21.130 AS11830 Instituto Costarricense de Electricidad y Telecom. 0.66ms from San Pedro, CR
116.236.24.34 AS4812 China Telecom (Group) 5.02ms from Shanghai, CN
97.75.213.50 AS21723 GOCO TECHNOLOGY LIMITED PARTNERSHIP 1.21ms from Vancouver, CA
86.32.203.34 AS205714 Telemach Hrvatska d.o.o. 1.28ms from Zagreb, HR
77.170.50.178 AS1136 KPN B.V. 2.74ms from Amsterdam, NL
197.85.186.2 AS3741 Dimension Data 1.82ms from Cape Town, ZA
118.94.147.226 AS9583 Sify Limited 1.13ms from Chennai, IN
47.44.144.130 AS20115 Charter Communications LLC 7.97ms from Chicago, US
103.226.255.66 AS133396 TEAMnetwork Systems Ltd 4.73ms from Christchurch, NZ
171.79.111.34 AS24560 Bharti Airtel Ltd., Telemedia Services 9.41ms from Delhi, IN
102.119.214.130 AS23889 Mauritius Telecom Ltd 2.91ms from Ebene, MU
183.179.32.66 AS9269 Hong Kong Broadband Network Ltd. 1.19ms from Hong Kong, HK

Traceroute

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

$
traceroute -a -n -q1 -m6 121.203.172.9
traceroute to 121.203.172.9 (121.203.172.9): 6 hops max, 52 byte packets
1 [AS15169] 72.14.239.92 181.568 ms
2 *
3 [AS17924] 203.78.42.167 196.118 ms
4 *
5 *
6 *
Measurement taken from IPinfo ProbeNet in Santiago de Querétaro, MX
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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