203.166.165.0/24

AS138421  ·  China Unicom

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Summary

Country China
Domain 21viacloud.com
ASN AS138421
Registry APNIC
ID ENTRUSTNET

WHOIS Details

inetnum:        203.166.160.0 - 203.166.191.255
netname:        ENTRUSTNET
descr:          Entrust Network Inc.
descr:          Building A2, 501 liyuan road, huangpu district, Shanghai
country:        CN
admin-c:        YW7118-AP
tech-c:         JS4343-AP
abuse-c:        AC1601-AP
status:         ALLOCATED PORTABLE
mnt-by:         MAINT-CNNIC-AP
mnt-irt:        IRT-ENTRUSTNET-CN
mnt-lower:      MAINT-CNNIC-AP
mnt-routes:     MAINT-CNCGROUP-RR
last-modified:  2023-11-28T00:57:18Z
source:         APNIC

irt:            IRT-ENTRUSTNET-CN
address:        Building A2, 501 liyuan road, huangpu district, Shanghai
e-mail:         zhou.yu@21viacloud.com
abuse-mailbox:  zhou.yu@21viacloud.com
admin-c:        YW7118-AP
tech-c:         JS4343-AP
auth:           # Filtered
mnt-by:         MAINT-CNNIC-AP
last-modified:  2025-11-18T00:34:39Z
source:         APNIC

role:           ABUSE CNNICCN
country:        ZZ
address:        Beijing, China
phone:          +000000000
e-mail:         ipas@cnnic.cn
admin-c:        IP50-AP
tech-c:         IP50-AP
nic-hdl:        AC1601-AP
remarks:        Generated from irt object IRT-CNNIC-CN
remarks:        ipas@cnnic.cn is invalid
abuse-mailbox:  ipas@cnnic.cn
mnt-by:         APNIC-ABUSE
last-modified:  2025-09-19T17:20:32Z
source:         APNIC

person:         Wu Yucheng
address:        Building A2, 501 liyuan road, huangpu district, Shanghai
country:        CN
phone:          +86-021-58667922
e-mail:         wu.yucheng@21viacloud.com
nic-hdl:        JS4343-AP
mnt-by:         MAINT-CNNIC-AP
last-modified:  2020-08-10T03:12:06Z
source:         APNIC

person:         Zhou Yu
address:        Building A2, 501 liyuan road, huangpu district, Shanghai
country:        CN
phone:          +86-021-63015500-160
e-mail:         zhou.yu@21viacloud.com
nic-hdl:        YW7118-AP
mnt-by:         MAINT-CNNIC-AP
last-modified:  2020-08-10T03:12:06Z
source:         APNIC

Nearby Ranges

BGP prefixes that overlap with 203.166.0.0/16

Range ASN Company Num of IPs
203.166.0.0/17 AS12234 Verizon Australia PTY Limited 32,768
203.166.0.0/17 AS703 Verizon Australia PTY Limited 32,768
203.166.224.0/19 AS7545 iiNet Limited 8,192
203.166.128.0/20 AS10031 WEBSATMEDIA PTE LTD 4,096
203.166.192.0/20 AS9326 PT Centrin Online Prima 4,096
203.166.220.0/22 AS63981 43/F, AIA Tower, 183 Electric Road, North Point, Hong Kong 1,024
203.166.140.0/22 AS10031 Cloud Service 1,024
203.166.219.0/24 AS45657 NSW Rural Fire Service 256
203.166.218.0/24 AS56307 NSW Education Standards Authority 256
203.166.159.0/24 AS10031 WebSatMedia 256
203.166.158.0/24 AS139719 Cloud Service 256
203.166.216.0/24 AS133736 TASMANET 256
203.166.217.0/24 AS45319 Universitas Bhayangkara 256

Hosted domains

There are 12 domain names hosted across 6 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP
203.166.165.201 tansoole.com 5
203.166.165.136 wansoole.com 3
203.166.165.216 titanchem.com 1
203.166.165.209 gongyititan.com 1
203.166.165.208 enormicro.com 1
203.166.165.10 titansci-group.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

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

IP Address ASN Details
203.166.165.220 AS138421 China Unicom 2.93ms from Shanghai, 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
96.238.178.216 AS701 Verizon Business 4.61ms from Ashburn, US
14.235.250.104 AS45899 VNPT Corp 4.00ms from Hanoi, VN
27.106.56.104 AS136907 HUAWEI CLOUDS 1.16ms from Hong Kong, HK
86.161.94.152 AS2856 British Telecommunications PLC 5.71ms from London, GB
24.188.8.88 AS6128 Cablevision Systems Corp. 2.21ms from New York City, US
125.105.10.248 AS4134 CHINANET-BACKBONE 8.69ms from Ningbo, CN
67.8.71.152 AS33363 Charter Communications, Inc 5.39ms from Orlando, US
85.142.64.232 AS49505 JSC Selectel 0.99ms from Saint Petersburg, RU
142.58.40.88 AS11105 Simon Fraser University 3.63ms from Seattle, US
99.199.39.56 AS852 TELUS Communications Inc. 7.46ms from Seattle, US
175.236.26.136 AS4766 Korea Telecom 2.30ms from Seoul, KR
118.161.12.232 AS3462 Data Communication Business Group 1.20ms from Taipei, TW
153.195.9.216 AS4713 NTT DOCOMO BUSINESS,Inc. 3.24ms from Tokyo, JP
175.29.206.8 AS5065 Bunny Communications 0.40ms from Tokyo, JP
149.200.248.216 AS8376 Jordan Data Communications Company LLC 1.09ms from Amman, JO
75.178.76.24 AS11426 Charter Communications Inc 10.11ms from Charlotte, US
3.248.44.248 AS16509 Amazon.com, Inc. 0.21ms from Dublin, IE
221.206.3.168 AS4837 CHINA UNICOM China169 Backbone 4.92ms from Harbin, CN
129.226.133.40 AS132203 Tencent Building, Kejizhongyi Avenue 0.44ms from Hong Kong, HK
116.33.63.216 AS17858 LG POWERCOMM 1.68ms from Incheon, KR
14.84.156.104 AS4766 Korea Telecom 1.92ms from Incheon, KR
58.234.86.120 AS9318 SK Broadband Co Ltd 1.91ms from Incheon, KR
85.34.212.232 AS3269 Telecom Italia S.p.A. 0.65ms from Milan, IT
218.216.223.136 AS17698 COMMUNITY NETWORK CENTER INCORPORATED. 5.37ms from Osaka, JP
18.231.106.248 AS16509 Amazon.com, Inc. 0.16ms from Osasco, BR

Traceroute

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

$
traceroute -a -n -q1 -f6 203.166.165.33
traceroute to 203.166.165.33 (203.166.165.33): 64 hops max, 52 byte packets
7 *
8 *
Measurement taken from IPinfo ProbeNet in Shanghai, CN
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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