IPv4 Subnet Calculator

(e.g. 192.168.1.1)
(subnet mask, CIDR or wildcard)
Calculation results
  • Address
    10.10.2.1
    00001010.00001010.00000010.00000001
  • Netmask
    255.255.255.0 = 24
    11111111.11111111.11111111.00000000
  • Wildcard
    0.0.0.255
    00000000.00000000.00000000.11111111
  •  
  • Network
    10.10.2.0/24
    00001010.00001010.00000010.00000000
    Class A
  • Broadcast
    10.10.2.255
    00001010.00001010.00000010.11111111
  • First IP
    10.10.2.1
    00001010.00001010.00000010.00000001
  • Last IP
    10.10.2.254
    00001010.00001010.00000010.11111110
  • Hosts/Net
    254
    nnnnnnnn.nnnnnnnn.nnnnnnnn.hhhhhhhh
    Private

About IPv4 Subnet Calculator

Enter IP address and netmask (decimal separated by dots (e.g. 255.255.255.0), CIDR (e.g. 29) or a Cisco wildcard (e.g. 0.0.0.31) and the IPv4 subnet calculator will calculate the broadcast, network,
Cisco wildcard mask, host range and quantity of hosts. Online and for free. The wildcard is the inverse netmask used for access control lists (ACL's) in Cisco routers.
This free online IPv4 subnet calculator also can be used as a teaching tool and presents the subnetting results as easy-to-understand binary values.
We can see two things: all host bits are zeroes in a network address, in a broadcast address they are all set. First bits determine the class of your network from A to E. A, B and C are commonly used. Each class has a range of valid IP addresses.
Address Range of Class A - 1.0.0.1 to 126.255.255.254 (supports 16 million hosts on each of 127 networks).
Class B - 128.1.0.1 to 191.255.255.254 (65,000 hosts on each of 16,000 networks).
Class C - 192.0.1.1 to 223.255.254.254 (254 hosts on each of 2 million networks).
Class D - 224.0.0.0 to 239.255.255.255 (address range reserved for multicast groups).
Class E - 240.0.0.0 to 254.255.255.254 (reserved for future use, research and development purposes).
Your IP address
Your are from United States54.204.94.228