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IP Class Finder

Determine the class of an IPv4 address and get detailed information.

Results:

IPv4 Address Classes

Class Range Default Subnet Mask Networks Hosts per Network Use
A 1.0.0.0 - 126.255.255.255 255.0.0.0 126 16,777,214 Large networks
B 128.0.0.0 - 191.255.255.255 255.255.0.0 16,384 65,534 Medium networks
C 192.0.0.0 - 223.255.255.255 255.255.255.0 2,097,152 254 Small networks
D 224.0.0.0 - 239.255.255.255 N/A N/A N/A Multicast
E 240.0.0.0 - 255.255.255.255 N/A N/A N/A Experimental

Special Addresses

  • 127.x.x.x: Loopback addresses (localhost)
  • 169.254.x.x: APIPA (Automatic Private IP Addressing)
  • 0.0.0.0: Default route / "this network"
  • 255.255.255.255: Limited broadcast

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