203.205.37.0/24

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 5 domain names hosted across 4 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
203.205.37.201	btv.org.vn	2
203.205.37.233	tms.com.vn	1
203.205.37.245	qmo.vn	1
203.205.37.223	tmshcm.com	1

Hosted domains API

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Useful for Cybersecurity

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Pingable IPs

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

IP Address	ASN	Details
203.205.37.201	AS45903 CMC Telecom Infrastructure Company	`1.19ms` from Ho Chi Minh City, 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
132.220.151.136	AS8075 Microsoft Corporation	`0.26ms` from Amsterdam, NL
23.97.141.168	AS8075 Microsoft Corporation	`0.17ms` from Amsterdam, NL
207.198.114.200	AS13768 Aptum Technologies	`0.54ms` from Ashburn, US
35.220.112.72	AS396982 Google LLC	`0.12ms` from Brussels, BE
89.35.207.248	AS201565 ETRURIA WI-FI S.R.L.	`8.91ms` from Frosinone, IT
40.120.24.120	AS8075 Microsoft Corporation	`0.15ms` from Johannesburg, ZA
117.214.235.88	AS9829 National Internet Backbone	`7.72ms` from Kolkata, IN
31.119.65.104	AS2856 British Telecommunications PLC	`0.94ms` from London, GB
213.121.87.88	AS2856 British Telecommunications PLC	`4.61ms` from London, GB
182.165.48.184	AS17511 OPTAGE Inc.	`2.06ms` from Osaka, JP
95.234.149.136	AS3269 Telecom Italia S.p.A.	`9.81ms` from Rome, IT
128.208.172.56	AS73 University of Washington	`0.90ms` from Seattle, US
20.194.120.200	AS8075 Microsoft Corporation	`0.35ms` from Seoul, KR
1.242.87.24	AS9318 SK Broadband Co Ltd	`2.23ms` from Seoul, KR
211.208.137.88	AS9318 SK Broadband Co Ltd	`1.59ms` from Seoul, KR
43.142.245.104	AS45090 Shenzhen Tencent Computer Systems Company Limited	`1.36ms` from Shanghai, CN
120.105.86.8	AS1659 Taiwan Academic Network (TANet) Information Center	`2.63ms` from Taipei, TW
35.79.36.104	AS16509 Amazon.com, Inc.	`0.16ms` from Tokyo, JP
122.133.88.56	AS2518 BIGLOBE Inc.	`5.63ms` from Tokyo, JP
180.21.94.24	AS4713 NTT DOCOMO BUSINESS,Inc.	`3.40ms` from Tokyo, JP
145.109.37.8	AS1124 Universiteit van Amsterdam	`2.07ms` from Amsterdam, NL
149.210.201.24	AS20857 Signet B.V.	`0.53ms` from Amsterdam, NL
62.141.161.40	AS20588 Forschungsverbund Berlin e.V.	`1.92ms` from Berlin, DE
47.211.203.8	AS19108 Optimum	`6.94ms` from Dallas, US
65.68.209.232	AS7018 AT&T Enterprises, LLC	`1.00ms` from Dallas, 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 203.205.37.236

traceroute to 203.205.37.236 (203.205.37.236): 64 hops max, 52 byte packets

5 [AS38623] 36.37.255.206 0.286 ms

6 [AS38623] 36.37.254.208 0.763 ms

7 [AS7552] 203.113.187.9 5.581 ms

8 *

9 [AS45903] 203.205.56.111 41.266 ms

10 [AS45903] 203.205.56.170 39.137 ms

11 [AS45903] 203.205.37.236 57.883 ms

Measurement taken from

IPinfo ProbeNet in Phnom Penh, KH

On December 14th 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.

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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