203.205.42.0/23

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:         [email protected]
abuse-mailbox:  [email protected]
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:         [email protected]
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:         [email protected]
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 6 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
203.205.43.100	smshoctap.com	2
203.205.43.98	hocbadientu.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

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Pingable IPs

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

IP Address	ASN	Details
203.205.42.37	AS45903 CMC Telecom Infrastructure Company	`11.78ms` from Hanoi, VN
203.205.43.89	AS45903 CMC Telecom Infrastructure Company	`10.23ms` 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
145.3.107.183	AS1103 SURF B.V.	`1.93ms` from Amsterdam, NL
94.132.44.183	AS2860 NOS COMUNICACOES, S.A.	`7.65ms` from Braga, PT
97.95.213.103	AS20115 Charter Communications LLC	`13.49ms` from Chicago, US
24.0.145.199	AS7922 Comcast Cable Communications, LLC	`6.63ms` from New York City, US
126.214.103.215	AS17676 SoftBank Corp.	`4.17ms` from Osaka, JP
60.214.89.55	AS4837 CHINA UNICOM China169 Backbone	`5.92ms` from Qingdao, CN
175.41.159.23	AS16509 Amazon.com, Inc.	`0.09ms` from Singapore, SG
75.9.154.55	AS7018 AT&T Enterprises, LLC	`4.46ms` from Chicago, US
34.244.17.23	AS16509 Amazon.com, Inc.	`0.13ms` from Dublin, IE
13.134.97.39	AS16509 Amazon.com, Inc.	`0.17ms` from London, GB
162.255.116.135	AS22612 Namecheap, Inc.	`0.33ms` from Phoenix, US
112.238.57.151	AS4837 CHINA UNICOM China169 Backbone	`7.70ms` from Qingdao, CN
216.221.228.23	AS14609 Equinix, Inc.	`0.59ms` from San Jose, US
51.13.80.39	AS8075 Microsoft Corporation	`1.89ms` from Sandefjord, NO
125.246.25.247	AS9316 DACOM-PUBNETPLUS	`2.64ms` from Seoul, KR
133.159.80.71	AS2497 Internet Initiative Japan Inc.	`0.99ms` from Tokyo, JP
192.99.144.103	AS16276 OVH SAS	`0.12ms` from Beauharnois, CA
35.220.117.71	AS396982 Google LLC	`0.12ms` from Brussels, BE
104.155.202.247	AS396982 Google LLC	`0.15ms` from Chang-hua, TW
182.132.181.103	AS4134 CHINANET-BACKBONE	`4.33ms` from Chengdu, CN
97.147.182.167	AS6167 Verizon Business	`14.67ms` from Chicago, US
212.90.87.199	AS16086 DNA Oyj	`5.81ms` from Helsinki, FI
171.244.100.183	AS7552 Viettel Group	`2.40ms` from Ho Chi Minh City, VN
69.148.129.247	AS7018 AT&T Enterprises, LLC	`8.56ms` from Houston, US
93.126.85.119	AS35530 Proline TM Ltd.	`0.56ms` from Kyiv, UA

Traceroute

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

traceroute -a -n -q1 -f5 203.205.42.37

traceroute to 203.205.42.37 (203.205.42.37): 64 hops max, 52 byte packets

5 [AS21859] 162.128.190.32 0.678 ms

6 [AS21859] 98.98.39.122 0.395 ms

7 [AS45903] 113.20.118.141 1.208 ms

8 [AS45903] 101.99.48.144 10.37 ms

9 [AS45903] 101.99.48.141 10.518 ms

10 [AS45903] 203.205.42.37 12.004 ms

Measurement taken from

IPinfo ProbeNet in Hanoi, VN

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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