203.166.189.0/24

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 are 2 domain names hosted across 1 IP address on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
203.166.189.246	3j-mall.com	2

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

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

IP Address	ASN	Details
203.166.189.109	AS138421 China Unicom	`5.69ms` 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
73.81.222.216	AS7922 Comcast Cable Communications, LLC	`7.95ms` from Ashburn, US
1.88.108.200	AS17429 BEIJING GEHUA CATV NETWORK CO.LTD	`8.80ms` from Beijing, CN
185.35.52.200	AS6848 Telenet BV	`1.90ms` from Brussels, BE
66.142.38.136	AS7018 AT&T Enterprises, LLC	`1.44ms` from Kansas City, US
82.3.15.72	AS5089 Virgin Media Limited	`4.99ms` from London, GB
99.98.255.40	AS7018 AT&T Enterprises, LLC	`2.27ms` from Los Angeles, US
203.25.35.24	AS134555 Encoo Pty Ltd	`0.95ms` from Melbourne, AU
115.216.143.8	AS4134 CHINANET-BACKBONE	`5.61ms` from Ningbo, CN
92.203.252.40	AS2527 Sony Network Communications Inc.	`1.67ms` from Osaka, JP
20.213.34.40	AS8075 Microsoft Corporation	`0.66ms` from Sydney, AU
116.82.4.200	AS2527 Sony Network Communications Inc.	`1.92ms` from Tokyo, JP
24.31.185.72	AS10796 Charter Communications Inc	`6.55ms` from Columbus, US
187.95.105.40	AS14868 Ligga Telecomunicações S.A.	`2.04ms` from Curitiba, BR
52.154.173.168	AS8075 Microsoft Corporation	`0.34ms` from Des Moines, US
113.177.183.104	AS45899 VNPT Corp	`4.14ms` from Hanoi, VN
97.236.139.200	AS6167 Verizon Business	`13.44ms` from Herndon, US
85.57.52.8	AS12479 Orange Espagne SA	`9.34ms` from Madrid, ES
162.240.17.248	AS46606 Unified Layer	`2.02ms` from Salt Lake City, US
163.180.115.104	AS17870 Kyung Hee University	`2.12ms` from Seoul, KR
39.109.224.40	AS55430 Starhub Ltd	`1.40ms` from Singapore, SG
46.242.158.136	AS12824 home.pl sp. z o.o.	`1.13ms` from Warsaw, PL
62.149.156.40	AS31034 Aruba S.p.A.	`0.27ms` from Arezzo, IT
100.52.127.248	AS14618 Amazon.com, Inc.	`0.46ms` from Ashburn, US
20.10.88.24	AS8075 Microsoft Corporation	`0.31ms` from Boydton, US
172.175.47.248	AS8075 Microsoft Corporation	`0.26ms` from Boydton, US

Traceroute

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

traceroute -a -n -q1 -f6 203.166.189.244

traceroute to 203.166.189.244 (203.166.189.244): 64 hops max, 52 byte packets

6 [AS8346] 196.207.250.185 1.262 ms

7 *

8 [AS8346] 196.207.219.92 2.121 ms

9 [AS6453] 195.219.129.84 67.795 ms

10 [AS6453] 195.219.65.7 76.558 ms

11 [AS6453] 195.219.32.179 77.036 ms

12 [AS6453] 80.231.139.1 76.44 ms

13 [AS6453] 195.219.32.221 76.092 ms

14 [AS6453] 80.231.196.36 76.524 ms

15 [AS6453] 80.231.154.26 77.096 ms

16 *

17 *

18 *

19 [AS4811] 211.152.63.37 308.399 ms

20 [AS4811] 211.152.63.194 278.229 ms

21 [AS4811] 211.152.63.21 285.352 ms

22 *

23 [AS138421] 203.166.189.244 313.107 ms

Measurement taken from

IPinfo ProbeNet in Dakar, SN

On March 13th 2026

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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