Tom.be

Subnet
Calculator
Merger
Name

Subnet details 81.133.64.0/18

Network address 81.133.64.0
Prefix length 18 (255.255.192.0)
Range 81.133.64.0 - 81.133.127.255
Hexadecimal 51854000
Binary 01010001 10000101 01000000 00000000
Binary subnet mask 11111111 11111111 11000000 00000000
Number of hosts 16,384
Parent subnet 81.133.0.0/17🔍
Previous subnet 81.133.0.0/18🔍
Next subnet 81.133.128.0/18🔍

Subnet tree

Netblock 81.0.0.0/8🔍 RIPE-CIDR-BLOCK (AU)
Route 81.128.0.0/11🔍 AS2856 BT-UK-AS BTnet UK Regional network (GB)🔍
Netblock 81.128.0.0/11🔍 UK-BT-20020725 (GB)
Netblock 81.128.0.0/12🔍 BT-INFRA (GB)
Netblock 81.133.64.0/18🔍 BT-ADSL (GB)