Private IP ranges

RFC1918 name IP address range number of addresses classful description largest CIDR block (subnet mask) host id size mask bits
24-bit block 16777216 single class A network ( 24 bits 8 bits
20-bit block 1048576 16 contigous class B networks ( 20 bits 12 bits
16-bit block 65536 256 contigous class C networks ( 16 bits 16 bits
APIPA Automatic Private IP Addressing is a feature on Microsoft operating systems to automatically assign itself an IP address within this range if a Dynamic Host Configuration Protocol server is not available.
Localhost Network testing addresses (also referred to as loop-back addresses)
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  • general/private_ip.txt
  • Last modified: 2021/04/12 14:52
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