1. All IP Ranges
  2. 221.0.0.0/8
  3. 221.6.0.0/16
  4. AS4837  | 221.6.0.0/16

221.6.0.0/16

AS4837  ·  CHINA UNICOM China169 Backbone

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Summary

Country China
Domain chinaunicom.cn
ASN AS4837
Registry APNIC
ID UNICOM-JS

WHOIS Details

inetnum:        221.6.0.0 - 221.6.255.255
netname:        UNICOM-JS
descr:          China Unicom Jiangsu province network
descr:          China Unicom
country:        CN
admin-c:        CH1302-AP
tech-c:         LL58-AP
abuse-c:        AC1718-AP
status:         ALLOCATED PORTABLE
remarks:        service provider
mnt-by:         APNIC-HM
mnt-lower:      MAINT-CNCGROUP-JS
mnt-routes:     MAINT-CNCGROUP-RR
mnt-irt:        IRT-CU-CN
last-modified:  2025-01-22T13:18:19Z
source:         APNIC

irt:            IRT-CU-CN
address:        No.21,Financial Street
address:        Beijing,100033
address:        P.R.China
e-mail:         [email protected]
abuse-mailbox:  [email protected]
admin-c:        CH1302-AP
tech-c:         CH1302-AP
auth:           # Filtered
remarks:        [email protected] was validated on 2025-10-17
mnt-by:         MAINT-CNCGROUP
last-modified:  2025-11-18T00:26:20Z
source:         APNIC

role:           ABUSE CUCN
country:        ZZ
address:        No.21,Financial Street
address:        Beijing,100033
address:        P.R.China
phone:          +000000000
e-mail:         [email protected]
admin-c:        CH1302-AP
tech-c:         CH1302-AP
nic-hdl:        AC1718-AP
remarks:        Generated from irt object IRT-CU-CN
remarks:        [email protected] was validated on 2025-10-17
abuse-mailbox:  [email protected]
mnt-by:         APNIC-ABUSE
last-modified:  2025-10-17T02:26:56Z
source:         APNIC

person:         ChinaUnicom Hostmaster
nic-hdl:        CH1302-AP
e-mail:         [email protected]
address:        No.21,Jin-Rong Street
address:        Beijing,100033
address:        P.R.China
phone:          +86-10-66259764
fax-no:         +86-10-66259764
country:        CN
mnt-by:         MAINT-CNCGROUP
last-modified:  2017-08-17T06:13:16Z
source:         APNIC

person:         Lan Li
nic-hdl:        LL58-AP
e-mail:         [email protected]
address:        No. 65 Beijing West Road,Nanjing,China
phone:          +86257900060
fax-no:         +86252900280
country:        CN
mnt-by:         MAINT-NEW
last-modified:  2013-08-15T02:13:11Z
source:         APNIC

route:          221.6.0.0/16
descr:          CNC Group CHINA169 Jiangsu Province Network
country:        CN
origin:         AS4837
mnt-by:         MAINT-CNCGROUP-RR
last-modified:  2008-09-04T07:54:45Z
source:         APNIC

route:          221.6.0.0/16
descr:          CNC Group CHINA169 Jiangsu Province Network
country:        CN
origin:         AS9929
mnt-by:         MAINT-CNCGROUP-RR
last-modified:  2008-09-04T07:54:45Z
source:         APNIC

Nearby Ranges

BGP prefixes that overlap with 221.0.0.0/8

Range ASN Company Num of IPs
221.144.0.0/12 AS4766 Korea Telecom 1,048,576
221.240.0.0/12 AS17506 ARTERIA Networks Corporation 1,048,576
221.144.0.0/12 AS152214 Korea Telecom 1,048,576
221.144.0.0/12 AS9856 Korea Telecom 1,048,576
221.176.0.0/13 AS9808 China Mobile Communications Corporation 524,288
221.224.0.0/13 AS146966 CHINANET jiangsu province network 524,288
221.176.0.0/13 AS56046 China Mobile Communications Corporation 524,288
221.216.0.0/13 AS4808 China Unicom Beijing province network 524,288
221.224.0.0/13 AS140292 CHINANET jiangsu province network 524,288
221.224.0.0/13 AS4809 CHINANET jiangsu province network 524,288
221.176.0.0/13 AS56042 China Mobile Communications Corporation 524,288
221.224.0.0/13 AS23650 CHINANET jiangsu province network 524,288
221.176.0.0/13 AS56040 China Mobile Communications Corporation 524,288
221.224.0.0/13 AS131325 CHINANET jiangsu province network 524,288
221.224.0.0/13 AS138950 CHINANET jiangsu province network 524,288
221.224.0.0/13 AS134770 CHINANET jiangsu province network 524,288
221.184.0.0/13 AS4713 NTT DOCOMO BUSINESS,Inc. 524,288
221.176.0.0/13 AS141425 China Mobile Communications Corporation 524,288
221.176.0.0/13 AS24445 China Mobile Communications Corporation 524,288
221.176.0.0/13 AS56044 China Mobile Communications Corporation 524,288
221.176.0.0/13 AS132510 China Mobile Communications Corporation 524,288
221.224.0.0/13 AS4134 CHINANET jiangsu province network 524,288
221.224.0.0/13 AS134756 CHINANET jiangsu province network 524,288
221.160.0.0/13 AS4766 Korea Telecom 524,288
221.176.0.0/13 AS56048 China Mobile Communications Corporation 524,288
221.176.0.0/13 AS139080 China Mobile Communications Corporation 524,288
221.224.0.0/13 AS137697 CHINANET jiangsu province network 524,288
221.224.0.0/13 AS137702 CHINANET jiangsu province network 524,288
221.232.0.0/14 AS58563 CHINANET Hubei province network 262,144
221.232.0.0/14 AS4134 CHINANET Hubei province network 262,144
221.140.0.0/14 AS9318 SK Broadband Co Ltd 262,144
221.200.0.0/14 AS4837 China Unicom Liaoning Province Network 262,144
221.124.0.0/14 AS9304 HGC Global Communications Limited 262,144
221.204.0.0/15 AS4837 China Unicom Shanxi Province Network 131,072
221.8.0.0/15 AS4837 China Unicom JILIN province network 131,072
221.130.0.0/15 AS56042 China Mobile Communications Corporation 131,072
221.170.0.0/15 AS2518 BIGLOBE Inc. 131,072
221.138.0.0/15 AS9318 SK Broadband Co Ltd 131,072
221.214.0.0/15 AS4837 China Unicom Shandong province network 131,072
221.130.0.0/15 AS56041 China Mobile Communications Corporation 131,072
221.130.0.0/15 AS9808 China Mobile Communications Corporation 131,072
221.137.0.0/16 AS9812 Oriental Cable Network Co., Ltd. 65,536
221.10.0.0/16 AS4837 China Unicom SiChuan province network 65,536
221.168.0.0/16 AS4766 Korea Telecom 65,536
221.206.0.0/16 AS4837 China Unicom Heilongjiang Province Network 65,536
221.117.0.0/16 AS17506 ARTERIA Networks Corporation 65,536
221.116.0.0/16 AS17506 ARTERIA Networks Corporation 65,536
221.115.0.0/16 AS17506 ARTERIA Networks Corporation 65,536
221.114.0.0/16 AS17506 ARTERIA Networks Corporation 65,536

Hosted domains

There are 274 domain names hosted across 155 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP
221.6.167.45 xn--fhq2cxuu14n.com 12
221.6.167.55 yzytgy.com 11
221.6.167.26 yzkjt.com 11
221.6.74.74 ljttech.com.cn 8
221.6.203.10 mwoptics.com 8
221.6.33.162 robanking.net 8
221.6.167.53 overseaarts.com 6
221.6.15.90 wlkjyp.cn 6
221.6.35.116 ldyjz.com 6
221.6.167.47 ry8.com.cn 6
221.6.167.44 leto.cn 6
221.6.167.59 yzysgy.com 6
221.6.167.46 gzdccpa.cn 5
221.6.35.120 studyfun.net 4
221.6.27.182 ubeesky.com 4
221.6.15.122 dengtakaoyan.com 4
221.6.45.147 dejiplaza.com 3
221.6.114.214 51wlcg.com 3
221.6.6.111 htsc.com.cn 3
221.6.202.163 nacks.com.cn 3

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

10,790 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
221.6.128.22 AS4837 CHINA UNICOM China169 Backbone 3.00ms from Nanjing, CN
221.6.103.101 AS4837 CHINA UNICOM China169 Backbone 3.56ms from Nanjing, CN
221.6.123.35 AS4837 CHINA UNICOM China169 Backbone 4.09ms from Nanjing, CN
221.6.31.161 AS4837 CHINA UNICOM China169 Backbone 1.05ms from Nanjing, CN
221.6.120.193 AS4837 CHINA UNICOM China169 Backbone 4.29ms from Nanjing, CN
221.6.17.73 AS4837 CHINA UNICOM China169 Backbone 4.15ms from Nanjing, CN
221.6.74.255 AS4837 CHINA UNICOM China169 Backbone 4.30ms from Shanghai, CN
221.6.87.161 AS4837 CHINA UNICOM China169 Backbone 4.09ms from Shanghai, CN
221.6.69.233 AS4837 CHINA UNICOM China169 Backbone 3.85ms from Shanghai, CN
221.6.140.169 AS4837 CHINA UNICOM China169 Backbone 6.39ms from Shanghai, CN
221.6.109.141 AS4837 CHINA UNICOM China169 Backbone 4.58ms from Shanghai, CN
221.6.53.169 AS4837 CHINA UNICOM China169 Backbone 3.57ms from Nanjing, CN
221.6.152.152 AS4837 CHINA UNICOM China169 Backbone 4.75ms from Nanjing, CN
221.6.48.142 AS4837 CHINA UNICOM China169 Backbone 2.66ms from Nanjing, CN
221.6.37.13 AS4837 CHINA UNICOM China169 Backbone 1.05ms from Nanjing, CN
221.6.79.247 AS4837 CHINA UNICOM China169 Backbone 5.08ms from Shanghai, CN
221.6.64.221 AS4837 CHINA UNICOM China169 Backbone 4.13ms from Shanghai, CN
221.6.78.19 AS4837 CHINA UNICOM China169 Backbone 5.11ms from Shanghai, CN
221.6.98.217 AS4837 CHINA UNICOM China169 Backbone 4.48ms from Shanghai, CN
221.6.11.31 AS4837 CHINA UNICOM China169 Backbone 3.96ms from Nanjing, CN
221.6.97.237 AS4837 CHINA UNICOM China169 Backbone 4.04ms from Nanjing, CN
221.6.43.174 AS4837 CHINA UNICOM China169 Backbone 7.96ms from Nanjing, CN
221.6.158.118 AS4837 CHINA UNICOM China169 Backbone 2.25ms from Nanjing, CN
221.6.125.205 AS4837 CHINA UNICOM China169 Backbone 4.82ms from Nanjing, CN
221.6.145.47 AS4837 CHINA UNICOM China169 Backbone 2.14ms from Nanjing, 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
34.42.39.128 AS396982 Google LLC 0.13ms from Council Bluffs, US
98.250.65.160 AS7922 Comcast Cable Communications, LLC 15.44ms from Flint, US
34.185.150.64 AS396982 Google LLC 0.08ms from Frankfurt am Main, DE
208.190.98.112 AS7018 AT&T Enterprises, LLC 1.35ms from Houston, US
86.142.5.0 AS2856 British Telecommunications PLC 2.22ms from London, GB
47.145.101.240 AS5650 Frontier Communications of America, Inc. 1.96ms from Los Angeles, US
51.92.41.144 AS16509 Amazon.com, Inc. 5.64ms from Madrid, ES
133.165.135.240 AS2527 Sony Network Communications Inc. 1.66ms from Osaka, JP
35.174.125.144 AS14618 Amazon.com, Inc. 0.23ms from Reston, US
181.233.164.0 AS263270 CONECTA FIBRA LTDA 16.12ms from Sao Paulo, BR
38.105.205.0 AS30666 Xchange Telecom Corp. 0.73ms from Secaucus, US
116.121.4.32 AS9318 SK Broadband Co Ltd 2.72ms from Seoul, KR
5.235.238.0 AS58224 Iran Telecommunication Company PJS 14.27ms from Yerevan, AM
156.204.89.144 AS8452 TE-AS 3.72ms from Cairo, EG
175.152.170.176 AS4837 CHINA UNICOM China169 Backbone 3.10ms from Chengdu, CN
34.45.91.208 AS396982 Google LLC 0.13ms from Council Bluffs, US
92.29.170.32 AS13285 TalkTalk Communications Limited 6.01ms from Manchester, GB
52.217.44.160 AS16509 Amazon.com, Inc. 0.08ms from Reston, US
211.176.121.80 AS9318 SK Broadband Co Ltd 1.24ms from Seoul, KR
112.171.12.48 AS9530 SHINSEGAE I C Co., Ltd. 1.78ms from Seoul, KR
118.171.38.96 AS3462 Data Communication Business Group 4.08ms from Taichung, TW
80.66.255.32 AS204595 UUS PROGRAMM 3.03ms from Tallinn, EE
46.198.155.224 AS3329 VODAFONE-PANAFON HELLENIC TELECOMMUNICATIONS COMPANY SA 1.16ms from Athens, GR
89.134.210.160 AS21334 One Hungary Ltd. 3.39ms from Budapest, HU
102.44.227.240 AS8452 TE-AS 3.35ms from Cairo, EG

Traceroute

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

$
traceroute -a -n -q1 -f5 221.6.51.23
traceroute to 221.6.51.23 (221.6.51.23): 64 hops max, 52 byte packets
6 *
7 *
8 *
9 *
10 [AS4837] 221.6.51.23 7.858 ms
Measurement taken from IPinfo ProbeNet in Shanghai, CN
On

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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.

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