203.205.16.0/21

AS45903 · CMC Telecom Infrastructure Company

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Summary

Country	Vietnam
Domain	cmctelecom.vn
ASN	AS45903
Registry	APNIC
ID	CMCTELECOM-VN

WHOIS Details

inetnum:        203.205.0.0 - 203.205.63.255
netname:        CMCTELECOM-VN
descr:          CMC Telecom Infrastructure Company
descr:          CMC Tower,Cluster Handicraft Production andSmall Industry, Cau Giay, Hanoi, Vietnam
country:        VN
admin-c:        HVA2-AP
tech-c:         NVH31-AP
status:         ALLOCATED PORTABLE
mnt-by:         MAINT-VN-VNNIC
mnt-irt:        IRT-VNNIC-AP
last-modified:  2023-08-31T05:01:55Z
source:         APNIC

irt:            IRT-VNNIC-AP
address:        Ha Noi, VietNam
phone:          +84-24-35564944
fax-no:         +84-24-37821462
e-mail:         hm-changed@vnnic.vn
abuse-mailbox:  hm-changed@vnnic.vn
admin-c:        NTTT1-AP
tech-c:         NTTT1-AP
auth:           # Filtered
mnt-by:         MAINT-VN-VNNIC
last-modified:  2025-11-17T23:08:34Z
source:         APNIC

person:         Hoang Viet Anh
address:        CMCTELECOM-VN
country:        VN
phone:          +84-366235766
e-mail:         anh.hv@cmctelecom.vn
nic-hdl:        HVA2-AP
mnt-by:         MAINT-VN-VNNIC
last-modified:  2023-08-31T04:22:33Z
source:         APNIC

person:         Nguyen Van Hieu
address:        CMCTELECOM-VN
country:        VN
phone:          +84-968189689
e-mail:         hieu.nv@cmctelecom.vn
nic-hdl:        NVH31-AP
mnt-by:         MAINT-VN-VNNIC
last-modified:  2022-08-28T04:27:35Z
source:         APNIC

route:          203.205.0.0/18
descr:          CMCTELECOM-VN
origin:         AS45903
mnt-by:         MAINT-VN-VNNIC
last-modified:  2022-09-19T02:33:28Z
source:         APNIC

Nearby Ranges

BGP prefixes that overlap with 203.205.0.0/16

Range	ASN	Company	Num of IPs
203.205.64.0/19	AS58519	CHINANET Guangdong province network	8,192
203.205.96.0/20	AS18092	Kyushu Tele Communications Company	4,096
203.205.112.0/20	AS2914	NTT Ltd Japan Corporation	4,096

Hosted domains

There are 71 domain names hosted across 22 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
203.205.21.98	dienphuochung.vn	3
203.205.21.92	globalmindtech.vn	3
203.205.21.102	kkas.edu.vn	2
203.205.21.48	seagullfnt.com.vn	2
203.205.21.93	chiropractic.vn	1
203.205.21.108	aivis.tech	1
203.205.21.61	vinhtantpc.com.vn	1
203.205.21.97	trustlab.vn	1
203.205.21.191	sagawa-vtm.com.vn	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

Read more

Pingable IPs

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

IP Address	ASN	Details
203.205.21.3	AS45903 CMC Telecom Infrastructure Company	`1.33ms` from Ho Chi Minh City, VN
203.205.22.25	AS45903 CMC Telecom Infrastructure Company	`0.80ms` from Hanoi, VN
203.205.20.85	AS45903 CMC Telecom Infrastructure Company	`2.86ms` from Ho Chi Minh City, VN
203.205.16.53	AS45903 CMC Telecom Infrastructure Company	`0.64ms` from Hanoi, VN
203.205.18.71	AS45903 CMC Telecom Infrastructure Company	`0.87ms` from Hanoi, VN
203.205.23.2	AS45903 CMC Telecom Infrastructure Company	`10.37ms` from Hanoi, VN
203.205.17.226	AS45903 CMC Telecom Infrastructure Company	`0.66ms` from Hanoi, VN

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
97.181.124.133	AS6167 Verizon Business	`11.25ms` from Atlanta, US
107.217.196.245	AS7018 AT&T Enterprises, LLC	`1.80ms` from Atlanta, US
115.26.0.69	AS4538 China Education and Research Network Center	`9.97ms` from Beijing, CN
113.2.28.197	AS4837 CHINA UNICOM China169 Backbone	`14.19ms` from Changchun, CN
189.14.9.213	AS22689 SERCOMTEL S/A TELECOMUNICACOES	`7.65ms` from Curitiba, BR
42.202.166.5	AS134762 CHINANET Liaoning province Dalian MAN network	`1.39ms` from Dalian, CN
88.70.239.133	AS3209 Vodafone GmbH	`9.04ms` from Duesseldorf, DE
59.51.178.197	AS4134 CHINANET-BACKBONE	`1.20ms` from Guiyang, CN
73.255.21.21	AS7922 Comcast Cable Communications, LLC	`4.48ms` from Houston, US
86.181.4.229	AS2856 British Telecommunications PLC	`4.19ms` from London, GB
23.197.67.133	AS20940 Akamai International B.V.	`0.57ms` from Manchester, GB
199.27.189.5	AS29838 Atlantic Metro Communications II, Inc.	`0.49ms` from New York City, US
73.112.222.213	AS7922 Comcast Cable Communications, LLC	`8.94ms` from New York City, US
88.124.87.101	AS12322 Free SAS	`8.71ms` from Paris, FR
123.132.21.149	AS4837 CHINA UNICOM China169 Backbone	`7.08ms` from Qingdao, CN
52.5.3.165	AS14618 Amazon.com, Inc.	`0.21ms` from Reston, US
114.30.215.101	AS38121 LG HelloVision Corp.	`7.96ms` from Seoul, KR
196.185.177.37	AS327934 SOCIETE NATIONALE DES TELECOMMUNICATIONS (Tunisie Telecom)	`13.27ms` from Tunis, TN
178.190.224.213	AS8447 A1 Telekom Austria AG	`17.08ms` from Vienna, AT
107.190.194.229	AS21921 New Hope Telephone Cooperative	`6.78ms` from Atlanta, US
172.200.21.117	AS8075 Microsoft Corporation	`0.18ms` from Boydton, US
23.94.185.133	AS36352 HostPapa	`0.10ms` from Buffalo, US
174.107.218.101	AS11426 Charter Communications Inc	`7.09ms` from Charlotte, US
73.183.210.229	AS7922 Comcast Cable Communications, LLC	`6.59ms` from Houston, US
71.150.160.149	AS7018 AT&T Enterprises, LLC	`3.17ms` from Miami, US

Traceroute

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

traceroute -a -n -q1 -f5 203.205.23.5

traceroute to 203.205.23.5 (203.205.23.5): 64 hops max, 52 byte packets

5 [AS21859] 162.128.190.34 0.304 ms

6 [AS21859] 98.98.39.124 0.276 ms

7 [AS45903] 113.20.118.141 1.84 ms

8 [AS45903] 101.99.48.144 10.271 ms

9 [AS45903] 203.205.23.5 10.399 ms

Measurement taken from

IPinfo ProbeNet in Hanoi, VN

On November 22nd 2025

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.

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