121.203.88.0/21

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 121.203.88.0/21

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
52.143.49.69 AS8075 Microsoft Corporation 0.24ms from Amsterdam, NL
124.65.19.5 AS4808 China Unicom Beijing Province Network 2.63ms from Beijing, CN
181.48.69.5 AS14080 Telmex Colombia S.A. 1.07ms from Bogota, CO
172.72.194.85 AS11426 Charter Communications Inc 9.95ms from Charlotte, US
208.78.26.101 AS29838 Atlantic Metro Communications II, Inc. 0.22ms from Chicago, US
69.241.224.69 AS7922 Comcast Cable Communications, LLC 8.88ms from Chicago, US
87.60.154.117 AS3292 TDC Holding A/S 4.22ms from Copenhagen, DK
73.242.168.5 AS7922 Comcast Cable Communications, LLC 13.85ms from Denver, US
3.28.89.53 AS16509 Amazon.com, Inc. 0.11ms from Dubai, AE
137.145.71.5 AS2152 CENIC 2.52ms from Los Angeles, US
76.218.250.229 AS7018 AT&T Enterprises, LLC 9.94ms from Los Angeles, US
62.82.70.229 AS6739 VODAFONE ONO, S.A. 0.61ms from Madrid, ES
16.51.201.245 AS16509 Amazon.com, Inc. 0.58ms from Melbourne, AU
176.207.248.37 AS1267 WIND TRE S.P.A. 19.96ms from Milan, IT
4.31.113.85 AS3356 Level 3 Parent, LLC 0.47ms from Philadelphia, US
128.208.251.101 AS73 University of Washington 2.29ms from Seattle, US
59.27.94.213 AS4766 Korea Telecom 3.37ms from Seoul, KR
211.187.84.181 AS9318 SK Broadband Co Ltd 4.22ms from Seoul, KR
140.206.112.165 AS17621 China Unicom Shanghai network 2.41ms from Shanghai, CN
210.4.203.21 AS13445 Cisco Webex LLC 0.62ms from Tokyo, JP
141.244.239.69 AS1117 Universitaet fur Bodenkultur, Wien 1.13ms from Vienna, AT
43.130.154.101 AS132203 Tencent Building, Kejizhongyi Avenue 0.28ms from Ashburn, US
216.172.190.5 AS19871 Network Solutions, LLC 0.84ms from Atlanta, US
209.242.45.117 AS10692 DLS Internet Services, Inc 0.45ms from Chicago, US
62.246.157.53 AS12312 ecotel communication ag 5.09ms from Duesseldorf, DE

Traceroute

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

$
traceroute -a -n -q1 -f2 -m6 121.203.89.137
traceroute to 121.203.89.137 (121.203.89.137): 6 hops max, 52 byte packets
2 [AS32181] 69.65.29.9 1.266 ms
3 [AS23522] 66.252.0.228 2.965 ms
4 *
5 *
6 *
Measurement taken from IPinfo ProbeNet in Chicago, US
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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