Tom.be

Subnet
Calculator
Merger
Name

Subnet details 81.21.16.0/20

Network address 81.21.16.0
Prefix length 20 (255.255.240.0)
Range 81.21.16.0 - 81.21.31.255
Hexadecimal 51151000
Binary 01010001 00010101 00010000 00000000
Binary subnet mask 11111111 11111111 11110000 00000000
Number of hosts 4,096
Parent subnet 81.21.0.0/19🔍
Previous subnet 81.21.0.0/20🔍
Next subnet 81.21.32.0/20🔍

Subnet tree

Netblock 81.0.0.0/8🔍 RIPE-CIDR-BLOCK (AU)
Route 81.21.16.0/20🔍 AS30848 IT-TWT-AS (IT)🔍
Netblock 81.21.16.0/20🔍 IT-TWT-20100610 (IT)