Tom.be

Subnet
Calculator
Merger
Name

Subnet details 123.103.40.0/21

Network address 123.103.40.0
Prefix length 21 (255.255.248.0)
Range 123.103.40.0 - 123.103.47.255
Hexadecimal 7b672800
Binary 01111011 01100111 00101000 00000000
Binary subnet mask 11111111 11111111 11111000 00000000
Number of hosts 2,048
Parent subnet 123.103.32.0/20🔍
Previous subnet 123.103.32.0/21🔍
Next subnet 123.103.48.0/21🔍

Subnet tree

Netblock 122.0.0.0/7🔍 APNIC-AP (AU)
Netblock 123.103.0.0/17🔍 CHINANETCENTER (CN)
Route 123.103.40.0/21🔍 AS4808 CHINA169-BJ China Unicom Beijing Province Network (CN)🔍