Tom.be

Subnet
Calculator
Merger
Name

Subnet details 121.21.0.0/20

Network address 121.21.0.0
Prefix length 20 (255.255.240.0)
Range 121.21.0.0 - 121.21.15.255
Hexadecimal 79150000
Binary 01111001 00010101 00000000 00000000
Binary subnet mask 11111111 11111111 11110000 00000000
Number of hosts 4,096
Parent subnet 121.21.0.0/19🔍
Previous subnet 121.20.240.0/20🔍
Next subnet 121.21.16.0/20🔍

Subnet tree

Netblock 121.0.0.0/8🔍 APNIC-AP (AU)
Route 121.16.0.0/12🔍 AS4837 CHINA169-Backbone CHINA UNICOM China169 Backbone (CN)🔍
Netblock 121.16.0.0/13🔍 UNICOM-HE (CN)