203.166.166.0/24

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
203.166.140.0/22 AS10031 Cloud Service 1,024
203.166.220.0/22 AS63981 43/F, AIA Tower, 183 Electric Road, North Point, Hong Kong 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 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
35.171.66.232 AS14618 Amazon.com, Inc. 0.52ms from Ashburn, US
141.53.177.168 AS680 Verein zur Foerderung eines Deutschen Forschungsnetzes e.V. 7.85ms from Berlin, DE
50.90.106.168 AS33363 Charter Communications, Inc 8.12ms from Chicago, US
14.245.35.40 AS45899 VNPT Corp 3.28ms from Da Nang, VN
180.74.186.184 AS4788 TM TECHNOLOGY SERVICES SDN. BHD. 4.04ms from Kuala Lumpur, MY
4.234.164.72 AS8075 Microsoft Corporation 0.30ms from London, GB
100.8.118.248 AS701 Verizon Business 1.93ms from New York City, US
122.51.131.120 AS45090 Shenzhen Tencent Computer Systems Company Limited 1.49ms from Shanghai, CN
86.88.228.232 AS1136 KPN B.V. 0.97ms from Amsterdam, NL
44.217.185.168 AS14618 Amazon.com, Inc. 0.47ms from Ashburn, US
106.13.37.8 AS38365 Beijing Baidu Netcom Science and Technology Co., Ltd. 4.92ms from Beijing, CN
181.132.193.88 AS13489 UNE EPM TELECOMUNICACIONES S.A. 12.41ms from Bogota, CO
24.64.73.168 AS6327 Shaw Communications 7.77ms from Calgary, CA
64.246.244.200 AS3663 NetNet 7.54ms from Chicago, US
18.216.237.8 AS16509 Amazon.com, Inc. 0.15ms from Columbus, US
188.244.74.8 AS21060 Atea A/S 0.47ms from Copenhagen, DK
195.29.112.8 AS5391 Hrvatski Telekom d.d. 5.04ms from Ljubljana, SI
106.71.110.232 AS4804 Microplex PTY LTD 2.31ms from Melbourne, AU
46.181.165.152 AS39927 E-Light-Telecom Ltd. 4.90ms from Novosibirsk, RU
77.55.141.136 AS15967 Nazwa.pl Sp.z.o.o. 0.30ms from Sao Paulo, BR
69.130.190.120 AS4181 TDS TELECOM 11.16ms from Seattle, US
91.92.79.152 AS39251 NETGUARD LLC 2.73ms from Sofia, BG
1.40.147.56 AS4804 Microplex PTY LTD 2.60ms from Sydney, AU
41.47.40.56 AS8452 TE-AS 5.47ms from Cairo, EG
54.76.23.56 AS16509 Amazon.com, Inc. 0.12ms from Dublin, IE

Traceroute

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

$
traceroute -a -n -q1 -f4 -m15 203.166.166.60
traceroute to 203.166.166.60 (203.166.166.60): 15 hops max, 52 byte packets
5 *
6 *
7 *
8 [AS4837] 219.158.16.77 270.286 ms
9 *
10 *
11 *
12 [AS138421] 220.196.252.174 238.082 ms
13 *
14 *
15 *
Measurement taken from IPinfo ProbeNet in Kuwait City, KW
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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