210.21.231.0/24

AS17623 · China Unicom Shenzen network

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Summary

Country	China
Domain	china-netcom.com
ASN	AS17623
Parent Range	210.21.192.0/18
Registry	APNIC
ID	SHENZHEN-CNC

WHOIS Details

inetnum:        210.21.192.0 - 210.21.255.255
netname:        SHENZHEN-CNC
country:        CN
descr:          shenzhen branch, china netcom corp
admin-c:        YS224-AP
tech-c:         YS224-AP
status:         ALLOCATED NON-PORTABLE
changed:        guoyb@china-netcom.com 20031222
mnt-by:         MAINT-CN-ZM28
mnt-lower:      MAINT-CN-SY28
source:         APNIC

person:         yumei sun
nic-hdl:        YS224-AP
e-mail:         sz-ipaddress@china-netcom.com
address:        china netcom
address:        shenzhen
phone:          +86-0755-6983588
country:        CN
changed:        moujh@china-netcom.com 20030827
mnt-by:         MAINT-CN-ZM28
source:         APNIC

route:          210.21.0.0/16
descr:          CNC Group CncNet
country:        CN
origin:         AS9929
mnt-by:         MAINT-CNCGROUP-RR
changed:        abuse@cnc-noc.net 20060330
source:         APNIC

Overlapping Ranges

BGP prefixes that contain 210.21.231.0/24

Range	ASN	Company	Num of IPs
210.21.192.0/18	AS17623	shenzhen branch, china netcom corp	16,384

Nearby Ranges

BGP prefixes that overlap with 210.21.0.0/16

Range	ASN	Company	Num of IPs
210.21.0.0/17	AS17622	China Unicom Guangdong province network	32,768
210.21.192.0/18	AS17623	shenzhen branch, china netcom corp	16,384
210.21.121.0/24	AS17622	guangzhou city	256
210.21.17.0/24	AS17622	guangzhou city	256
210.21.51.0/24	AS17622	guangzhou city	256
210.21.237.0/24	AS17623	Zhaoshangtianyu	256

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

Read more

Pingable IPs

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

IP Address	ASN	Details
210.21.231.121	AS17623 China Unicom Shenzen network	`4.90ms` from Guangzhou, CN

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
188.213.175.200	AS31034 Aruba S.p.A.	`0.46ms` from Arezzo, IT
84.193.63.56	AS6848 Telenet BV	`7.45ms` from Brussels, BE
220.192.157.152	AS4837 CHINA UNICOM China169 Backbone	`2.67ms` from Chongqing, CN
69.61.137.104	AS6181 Cincinnati Bell Telephone Company LLC	`0.72ms` from Cincinnati, US
122.255.34.40	AS18001 Dialog Axiata PLC.	`3.69ms` from Colombo, LK
107.217.145.232	AS7018 AT&T Enterprises, LLC	`7.70ms` from Fremont, US
68.102.99.72	AS22773 Cox Communications Inc.	`6.74ms` from Kansas City, US
81.111.46.8	AS5089 Virgin Media Limited	`7.85ms` from London, GB
90.194.224.8	AS5607 Sky UK Limited	`1.14ms` from London, GB
191.91.73.56	AS27831 Colombia Móvil	`17.21ms` from Medellin, CO
68.173.126.104	AS12271 Charter Communications Inc	`3.75ms` from New York City, US
87.184.56.24	AS3320 Deutsche Telekom AG	`4.40ms` from Nuernberg, DE
175.247.158.136	AS4766 Korea Telecom	`4.81ms` from Seoul, KR
18.182.91.40	AS16509 Amazon.com, Inc.	`0.21ms` from Tokyo, JP
89.161.145.136	AS12824 home.pl S.A.	`0.81ms` from Warsaw, PL
52.81.145.8	AS55960 Beijing Guanghuan Xinwang Digital	`3.40ms` from Beijing, CN
212.87.36.136	AS12512 CBXNET combox internet GmbH	`1.21ms` from Berlin, DE
48.214.37.232	AS8075 Microsoft Corporation	`0.24ms` from Boydton, US
142.161.96.232	AS7122 Bell Canada	`16.22ms` from Chicago, US
79.228.111.88	AS3320 Deutsche Telekom AG	`4.54ms` from Frankfurt am Main, DE
39.171.10.136	AS56041 China Mobile communications corporation	`5.90ms` from Hangzhou, CN
212.128.126.120	AS200521 Ministerio De Economia, Comercio Y Empresa	`2.09ms` from Madrid, ES
147.156.64.24	AS766 RedIRIS Autonomous System	`5.75ms` from Madrid, ES
89.159.71.152	AS15557 Societe Francaise Du Radiotelephone - SFR SA	`9.20ms` from Paris, FR
207.182.76.56	AS22646 Hargray Communications Group, Inc.	`8.34ms` from Atlanta, US

Traceroute

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

traceroute -a -n -q1 -f2 210.21.231.177

traceroute to 210.21.231.177 (210.21.231.177): 64 hops max, 52 byte packets

2 [AS3356] 212.133.21.5 4.07 ms

3 [AS3356] 4.69.153.125 164.445 ms

4 [AS3356] 4.26.1.158 337.482 ms

5 *

6 *

7 *

8 *

9 [AS17623] 210.21.231.177 327.77 ms

Measurement taken from

IPinfo ProbeNet in Budapest, HU

On November 14th 2025

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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