203.166.166.0/24

AS138421  ·  China Unicom

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Summary

Country China
Domain entrust.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 AS703 Verizon Australia PTY Limited 32,768
203.166.0.0/17 AS12234 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
203.166.158.0/23 AS139719 WEBSATMEDIA PTE LTD 512
203.166.219.0/24 AS45657 NSW Rural Fire Service 256
203.166.158.0/24 AS139719 Cloud Service 256
203.166.216.0/24 AS133736 TASMANET 256
203.166.218.0/24 AS56307 NSW Education Standards Authority 256
203.166.159.0/24 AS139719 Cloud Service 256
203.166.217.0/24 AS45319 Universitas Bhayangkara 256

Hosted domains

There is 1 domain name hosted across 1 IP address on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP
203.166.166.166 166166166.cn 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

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
13.218.100.88 AS14618 Amazon.com, Inc. 0.54ms from Ashburn, US
125.238.221.200 AS4771 Spark New Zealand Trading Ltd. 13.49ms from Auckland, NZ
44.240.235.40 AS16509 Amazon.com, Inc. 0.14ms from Boardman, US
102.102.100.40 AS36925 MEDITELECOM 18.28ms from Casablanca, MA
73.45.1.200 AS7922 Comcast Cable Communications, LLC 4.69ms from Chicago, US
98.184.197.120 AS22773 Cox Communications Inc. 5.90ms from Los Angeles, US
176.129.86.168 AS5410 Bouygues Telecom SA 8.96ms from Marseille, FR
1.43.199.136 AS4804 Microplex PTY LTD 6.12ms from Melbourne, AU
71.228.85.40 AS7922 Comcast Cable Communications, LLC 9.58ms from Miami, US
161.35.120.88 AS14061 DigitalOcean, LLC 0.17ms from New York City, US
1.246.145.152 AS9318 SK Broadband Co Ltd 3.22ms from Seoul, KR
210.242.83.24 AS198949 Radware Ltd 0.64ms from Taipei, TW
203.136.33.152 AS2518 BIGLOBE Inc. 10.30ms from Tokyo, JP
86.88.228.232 AS1136 KPN B.V. 1.08ms from Amsterdam, NL
34.78.231.56 AS396982 Google LLC 0.12ms from Brussels, BE
41.239.106.248 AS8452 TE-AS 3.34ms from Cairo, EG
116.62.179.232 AS37963 Hangzhou Alibaba Advertising Co.,Ltd. 4.70ms from Hangzhou, CN
122.241.124.72 AS4134 CHINANET-BACKBONE 9.80ms from Hangzhou, CN
94.3.239.248 AS5607 Sky UK Limited 10.31ms from London, GB
86.202.29.72 AS3215 Orange S.A. 4.06ms from Lyon, FR
132.216.109.152 AS15318 McGill University 1.44ms from Montreal, CA
61.205.83.40 AS17511 OPTAGE Inc. 18.57ms from Osaka, JP
126.220.192.56 AS17676 SoftBank Corp. 3.74ms from Osaka, JP
123.50.242.24 AS9614 Oita Cable Telecom Co,ltd. 11.29ms from Osaka, JP
4.251.109.40 AS8075 Microsoft Corporation 0.16ms from Paris, FR

Traceroute

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

$
traceroute -a -n -q1 -f4 -m12 203.166.166.107
traceroute to 203.166.166.107 (203.166.166.107): 12 hops max, 52 byte packets
4 [AS6939] 64.71.180.51 1.426 ms
5 *
6 *
7 *
10 *
11 *
12 *
Measurement taken from IPinfo ProbeNet in Fremont, 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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