11.7.1 Ranges of private IP addresses
The Internet Engineering Task Force (IETF) and Internet Assigned Numbers Authority (IANA) reserved the following IP address ranges for private networks, such as enterprise local area networks (LANs), corporate offices, and residential networks:
- IPv4 private address ranges (RFC 1918):
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10.0.0.0 to 10.255.255.255 (24-bit block)
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172.16.0.0 to 172.31.255.255 (20-bit block)
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192.168.0.0 to 192.168.255.255 (16-bit block)
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- IPv6 private address ranges:
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fc00::/7 address block = RFC 4193 unique local addresses (ULA)
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fec0::/10 address block = deprecated (RFC 3879)
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