SubnetOnline.com - IPv4 CIDR Calculator

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IPv4 CIDR Calculator

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

A very complete CIDR Subnet calculator with Hex conversion and easy network range and subnet mask adjustement.

 

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:  --