AS45903 is the autonomous system of CMC Telecom Infrastructure Company. It holds 82,432 IPv4 addresses in 54 prefixes plus 4 IPv6 ranges, mainly in 
Vietnam.
By IPv4 addresses the network ranks #2,117 worldwide and #9 of 529 networks in Vietnam. That is 0.49% of the country’s IPv4 space.
The largest block is 101.99.4.0 to 101.99.63.255 with 15,360 addresses, geolocated to Hanoi.
- IPv4 addresses
- 82,432
- IPv4 prefixes
- 54
- World rank
- #2,117
- Country share
- 0.49%
- IPv6 ranges
- 4
Addresses by country
- Vietnam 100%
Largest blocks
- 101.99.4.0 Hanoi15,360
- 203.205.16.0 Hanoi12,288
- 113.20.96.0 Mai Dich8,192
- 42.96.38.0 Hanoi6,400
- 183.91.15.0 Thanh Xuân4,352
- 203.171.16.0 Hanoi4,096
- 183.91.0.0 Hanoi3,584
- 103.63.110.0 Haiphong3,584
Networks of similar size
82,688
82,688
82,688
82,432
82,432
82,432IPv4 prefixes
- 42.96.38.0/23
- 42.96.40.0/21
- 42.96.48.0/21
- 42.96.56.0/22
- 42.96.60.0/23
- 42.96.62.0/24
- 45.122.232.0/21
- 45.122.240.0/22
- 45.122.245.0/24
- 45.122.246.0/23
- 45.122.248.0/22
- 45.122.252.0/24
- 45.122.254.0/23
- 101.99.0.0/23
- 101.99.2.0/24
- 101.99.4.0/22
- 101.99.8.0/21
- 101.99.16.0/20
- 101.99.32.0/19
- 103.9.196.0/22
- 103.63.104.0/22
- 103.63.110.0/23
- 103.63.112.0/21
- 103.63.120.0/22
- 103.108.132.0/22
- 103.224.168.0/22
- 103.229.40.0/22
- 103.246.220.0/22
- 113.20.96.0/19
- 115.165.160.0/24
- 115.165.166.0/24
- 119.82.128.0/22
- 119.82.132.0/24
- 119.82.134.0/23
- 119.82.136.0/21
- 124.158.14.0/24
- 144.48.24.0/22
- 162.4.8.0/24
- 163.52.14.0/23
- 183.91.0.0/21
- 183.91.8.0/22
- 183.91.12.0/23
- 183.91.15.0/24
- 183.91.16.0/20
- 202.134.16.0/21
- 203.171.16.0/20
- 203.205.0.0/22
- 203.205.5.0/24
- 203.205.6.0/23
- 203.205.8.0/22
- 203.205.12.0/23
- 203.205.14.0/24
- 203.205.16.0/20
- 203.205.32.0/19
Questions and answers
Who owns AS45903?
Autonomous system AS45903 is operated by CMC Telecom Infrastructure Company.
How many IP addresses does AS45903 have?
The network holds 82,432 IPv4 addresses in 54 prefixes, plus 4 IPv6 ranges.
Which country is AS45903 in?
The main country is Vietnam.
How big is AS45903?
By IPv4 addresses it ranks #2,117 worldwide.
What is the largest address block of AS45903?
101.99.4.0 to 101.99.63.255, 15,360 addresses.