Autonomous System
AS45903 CMC Telecom Infrastructure Company
ISPActiveVietnamAPNIC
AS45903 (CMCTELECOM-VN) is an ISP network operated by CMC Telecom Infrastructure Company in Vietnam, registered with APNIC. It has 352 IPv4 prefixes with 185,856 addresses and 133 IPv6 prefixes, which makes it the 1,383rd largest of 82,200 active autonomous systems by IPv4 space.
IPv4 addresses185,856in 352 prefixes
IPv6 prefixes133≈ 3.2 × 10²⁸ addresses
Size rank#1,383of 82,200 active ASNs
Details
OrganizationCMC Telecom Infrastructure Company
AS nameCMCTELECOM-VN
Websitecmctelecom.vn
Country Vietnam (VN)
Network typeISP
RegistryAPNIC
Abuse contacthm-changed@vnnic.vn
Registered—
Last updated2025-05-16
IPv4 prefixes
352 prefixes · 185,856 addresses| Network | Addresses | First – last address |
|---|---|---|
| 42.96.32.0/19 | 8,192 | 42.96.32.0 – 42.96.63.255 |
| 113.20.96.0/19 | 8,192 | 113.20.96.0 – 113.20.127.255 |
| 183.91.0.0/20 | 4,096 | 183.91.0.0 – 183.91.15.255 |
| 183.91.16.0/20 | 4,096 | 183.91.16.0 – 183.91.31.255 |
| 101.99.0.0/21 | 2,048 | 101.99.0.0 – 101.99.7.255 |
| 101.99.8.0/21 | 2,048 | 101.99.8.0 – 101.99.15.255 |
| 101.99.16.0/21 | 2,048 | 101.99.16.0 – 101.99.23.255 |
| 101.99.24.0/21 | 2,048 | 101.99.24.0 – 101.99.31.255 |
| 101.99.32.0/21 | 2,048 | 101.99.32.0 – 101.99.39.255 |
| 101.99.48.0/21 | 2,048 | 101.99.48.0 – 101.99.55.255 |
| 101.99.56.0/21 | 2,048 | 101.99.56.0 – 101.99.63.255 |
| 115.165.160.0/21 | 2,048 | 115.165.160.0 – 115.165.167.255 |
| 183.91.8.0/21 | 2,048 | 183.91.8.0 – 183.91.15.255 |
| 183.91.16.0/21 | 2,048 | 183.91.16.0 – 183.91.23.255 |
| 183.91.24.0/21 | 2,048 | 183.91.24.0 – 183.91.31.255 |
| 203.171.24.0/21 | 2,048 | 203.171.24.0 – 203.171.31.255 |
| 203.205.16.0/21 | 2,048 | 203.205.16.0 – 203.205.23.255 |
| 203.205.24.0/21 | 2,048 | 203.205.24.0 – 203.205.31.255 |
| 203.205.32.0/21 | 2,048 | 203.205.32.0 – 203.205.39.255 |
| 203.205.40.0/21 | 2,048 | 203.205.40.0 – 203.205.47.255 |
| 203.205.48.0/21 | 2,048 | 203.205.48.0 – 203.205.55.255 |
| 203.205.56.0/21 | 2,048 | 203.205.56.0 – 203.205.63.255 |
| 42.96.40.0/22 | 1,024 | 42.96.40.0 – 42.96.43.255 |
| 42.96.44.0/22 | 1,024 | 42.96.44.0 – 42.96.47.255 |
| 45.122.232.0/22 | 1,024 | 45.122.232.0 – 45.122.235.255 |
42.96.32.0/19 113.20.96.0/19 183.91.0.0/20 183.91.16.0/20 101.99.0.0/21 101.99.8.0/21 101.99.16.0/21 101.99.24.0/21 101.99.32.0/21 101.99.48.0/21 101.99.56.0/21 115.165.160.0/21 183.91.8.0/21 183.91.16.0/21 183.91.24.0/21 203.171.24.0/21 203.205.16.0/21 203.205.24.0/21 203.205.32.0/21 203.205.40.0/21 203.205.48.0/21 203.205.56.0/21 42.96.40.0/22 42.96.44.0/22 45.122.232.0/22
The 25 largest of 352. The API and the database have all of them.
IPv6 prefixes
133 prefixes- 2402:5300::/35
- 2402:5300:2000::/35
- 2402:5300:4000::/35
- 2402:5300:1000::/40
- 2402:5300:1100::/40
- 2402:5300:1300::/40
- 2402:5300:1400::/40
- 2402:5300:1500::/40
- 2402:5300:1600::/40
- 2402:5300:400::/42
- 2402:5300:2000::/42
- 2402:5300:4000::/42
- 2402:5300:500::/44
- 2402:5300:600::/44
- 2402:5300:700::/44
- 2402:5300:800::/44
- 2402:5300:900::/44
- 2402:5300:1200::/44
- 2402:5300:2100::/44
- 2402:5300:2200::/44
- 2402:5300:2300::/44
- 2402:5300:4100::/44
- 2402:5300:4200::/44
- 2402:5300:4300::/44
- 2402:5300:4400::/44
2402:5300::/35 2402:5300:2000::/35 2402:5300:4000::/35 2402:5300:1000::/40 2402:5300:1100::/40 2402:5300:1300::/40 2402:5300:1400::/40 2402:5300:1500::/40 2402:5300:1600::/40 2402:5300:400::/42 2402:5300:2000::/42 2402:5300:4000::/42 2402:5300:500::/44 2402:5300:600::/44 2402:5300:700::/44 2402:5300:800::/44 2402:5300:900::/44 2402:5300:1200::/44 2402:5300:2100::/44 2402:5300:2200::/44 2402:5300:2300::/44 2402:5300:4100::/44 2402:5300:4200::/44 2402:5300:4300::/44 2402:5300:4400::/44
The 25 largest of 133. The API and the database have all of them.
Query AS45903 with the API
The ASN lookup returns everything on this page as JSON, including every prefix. ASN lookups need an API key: a free account comes with 1,000 requests a day.
curl "https://api.ipapi.is/?q=AS45903&key=YOUR_API_KEY"
Any address in its prefixes resolves to AS45903, with or without a key:
curl "https://api.ipapi.is/?q=42.96.32.1"
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