203.171.23.0/24

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:        203.171.16.0 - 203.171.31.255
netname:        CMCTELECOM-VN
country:        VN
descr:          CMC Telecom Infrastructure Company
descr:          CMC Tower,Duy Tan, Dich Vong Hau, Cau Giay, Ha Noi
admin-c:        HVA2-AP
tech-c:         NVH31-AP
status:         ALLOCATED PORTABLE
mnt-by:         MAINT-VN-VNNIC
mnt-irt:        IRT-VNNIC-AP
last-modified:  2023-08-31T05:01:31Z
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:  2025-09-04T05:18:22Z
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:          203.171.16.0/20
descr:          CMCTELECOM-VN
origin:         AS45903
mnt-by:         MAINT-VN-VNNIC
last-modified:  2022-09-16T17:39:37Z
source:         APNIC

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

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Useful for Cybersecurity

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Pingable IPs

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

IP Address	ASN	Details
203.171.23.221	AS45903 CMC Telecom Infrastructure Company	`1.17ms` 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
121.72.100.88	AS4768 One New Zealand Group Limited	`16.46ms` from Auckland, NZ
111.62.12.136	AS24547 Hebei Mobile Communication Company Limited	`8.55ms` from Beijing, CN
56.137.97.56	AS8987 Amazon Data Services Ireland Ltd	`2.97ms` from Boardman, US
76.180.87.248	AS11351 Charter Communications Inc	`18.53ms` from Chicago, US
200.129.0.72	AS1916 Rede Nacional de Ensino e Pesquisa	`0.68ms` from Fortaleza, BR
2.216.184.104	AS5607 Sky UK Limited	`3.42ms` from London, GB
196.127.195.88	AS36925 MEDITELECOM	`17.60ms` from Madrid, ES
157.208.11.200	AS11290 Cogeco Connexion inc	`12.43ms` from Montreal, CA
119.186.113.88	AS4837 CHINA UNICOM China169 Backbone	`4.78ms` from Qingdao, CN
124.131.28.248	AS4837 CHINA UNICOM China169 Backbone	`11.33ms` from Qingdao, CN
187.233.31.200	AS8151 UNINET	`11.47ms` from Santiago de Queretaro, MX
210.117.134.40	AS7560 Jeonbuk National University	`4.06ms` from Seoul, KR
130.237.223.216	AS1653 Vetenskapsradet / SUNET	`0.68ms` from Stockholm, SE
81.206.205.24	AS1136 KPN B.V.	`1.36ms` from Amsterdam, NL
20.124.221.56	AS8075 Microsoft Corporation	`0.42ms` from Ashburn, US
93.208.175.40	AS3320 Deutsche Telekom AG	`2.72ms` from Duesseldorf, DE
212.211.154.104	AS12399 q.beyond AG	`0.40ms` from Frankfurt am Main, DE
84.183.31.248	AS3320 Deutsche Telekom AG	`5.67ms` from Frankfurt am Main, DE
187.139.150.120	AS8151 UNINET	`6.49ms` from Guadalajara, MX
113.191.135.72	AS45899 VNPT Corp	`2.41ms` from Hanoi, VN
90.68.84.24	AS12479 Orange Espagne SA	`12.45ms` from Madrid, ES
47.12.241.136	AS20115 Charter Communications LLC	`18.17ms` from Minneapolis, US
178.120.150.248	AS6697 Republican Unitary Telecommunication Enterprise Beltelecom	`6.79ms` from Minsk, BY
220.186.39.216	AS4134 CHINANET-BACKBONE	`10.68ms` from Nanchang, CN
187.73.93.88	AS262673 VERO S.A	`8.93ms` from Osasco, BR

Traceroute

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

traceroute -a -n -q1 203.171.23.241

traceroute to 203.171.23.241 (203.171.23.241): 64 hops max, 52 byte packets

1 [AS15169] 64.233.174.23 56.363 ms

2 *

3 [AS45903] 101.99.0.25 76.028 ms

4 [AS45903] 203.171.23.241 78.468 ms

Measurement taken from

IPinfo ProbeNet in Osaka, JP

On September 4th 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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