121.203.64.0/21

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:  2025-11-17T23:08:35Z
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 121.203.64.0/21

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
5.107.253.149 AS5384 Emirates Internet 3.49ms from Al Fujairah City, AE
204.254.215.101 AS701 Verizon Business 2.55ms from Ashburn, US
104.199.43.213 AS396982 Google LLC 0.13ms from Brussels, BE
41.237.138.133 AS8452 TE-AS 7.24ms from Cairo, EG
31.54.159.5 AS2856 British Telecommunications PLC 6.37ms from Erith, GB
212.114.243.245 AS8767 M-net Telekommunikations GmbH 3.05ms from Frankfurt am Main, DE
112.48.154.5 AS9808 China Mobile Communications Group Co., Ltd. 6.54ms from Fuzhou, CN
27.118.20.149 AS55313 Hanel Communication JSC 1.37ms from Hanoi, VN
67.4.147.101 AS209 CenturyLink Communications, LLC 1.51ms from Minneapolis, US
109.174.91.245 AS30922 MTS PJSC 0.93ms from Novosibirsk, RU
87.164.147.21 AS3320 Deutsche Telekom AG 5.33ms from Nuernberg, DE
168.227.251.133 AS264898 INTESYS INFORMATICA 0.73ms from Osasco, BR
179.48.101.101 AS271072 ULTRAFIBRA NET REPRESENTACOES TELECOM EIRELI 7.57ms from Osasco, BR
65.121.134.149 AS209 CenturyLink Communications, LLC 3.18ms from Phoenix, US
80.80.168.181 AS21246 IPKO Telecommunications LLC 7.43ms from Pristina, XK
107.170.195.197 AS14061 DigitalOcean, LLC 0.30ms from Santa Clara, US
144.250.40.5 AS9466 UUNET Japan Limited 1.03ms from Singapore, SG
170.64.165.85 AS14061 DigitalOcean, LLC 0.25ms from Sydney, AU
34.180.84.21 AS396982 Google LLC 0.17ms from Tokyo, JP
188.254.41.101 AS12389 PJSC Rostelecom 0.32ms from Vladivostok, RU
213.34.227.5 AS15435 DELTA Fiber Nederland B.V. 2.92ms from Amsterdam, NL
70.16.76.197 AS13977 Fidium 3.33ms from Boston, US
64.25.90.85 AS26251 Prospeed.Net,Inc. 3.22ms from Boston, US
34.243.127.245 AS16509 Amazon.com, Inc. 0.17ms from Dublin, IE
102.32.78.197 AS327782 Metrofibre Networx 2.36ms from Johannesburg, ZA

Traceroute

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

$
traceroute -a -n -q1 -m6 121.203.66.76
traceroute to 121.203.66.76 (121.203.66.76): 6 hops max, 52 byte packets
1 [AS15169] 72.14.239.92 143.363 ms
2 *
3 [AS17924] 203.78.42.167 150.405 ms
4 *
5 *
6 *
Measurement taken from IPinfo ProbeNet in Los Angeles, 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.

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