SubnetOnline.com - IPv4 CIDR Calculator

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IPv4 CIDR Calculator

Credits:
Copyright © 1999 2000 2003 Piotr Klaban
http://www.klaban.torun.pl/

This very complete CIDR Subnet calculator with Hex conversion and easy network range and subnet mask adjustement allows for easy and complete calculation of subnets. This subnet calculator also converts values from decimal to hexadecimal subnet notation and back.

 

IPv4 Network Calculator

 

Network Class (n):
Class A: 1.0.0.0 - 127.255.255.255
Class B: 128.0.0.0 - 191.255.255.255
Class C: 192.0.0.0 - 223.255.255.255
Multicast: 224.0.0.0 - 239.255.255.255
Other: 240.0.0.0 - 255.255.255.255
Netmask Bits (s+n):
Subnet Bits (s):
# of subnets:
# of hosts:
IP Bit Map:
Host Address (decimal):
  Decimal   Hexadecimal
IP: . . . . . .
Netmask (n+s): . . .   . . .
Subnet Mask (s): . . . . . .
Network: . . .   . . .
Broadcast: . . .   . . .
       
IP Address Range:  --