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Example networks for documentation

Background

When writing documents you often need networks or IP addresses for examples. This page lists the networks which are explicitly mentioned in Internet Standards for this purpose.

IPv4 Example Networks

Source: RFC5737

The following networks are fully routable /24 networks (256 addresses), but set aside for documentation purposes:

  • 192.0.2.0/24
  • 198.51.100.0/24
  • 203.0.113.0/24

Source: RFC1918

The following networks are so-called private networks, they cannot be routed in the global BGP table but can be freely used in private networks:

  • 10.0.0.0/8 (10.0.0.0 - 10.255.255.255)
  • 172.16.0.0/12 (172.16.0.0 - 172.31.255.255)
  • 192.168.0.0/16 (192.168.0.0 - 192.168.255.255)

IPv6 Example Networks

Sources: RFC3849 and RFC9637

The following network blocks are fully routable, but set aside for documentation purposes:

  • 2001:db8::/32
  • 3fff::/20

Autonomous System Numbers

Source: RFC5398

The following AS numbers are set aside for documentation purposes:

  • 16-Bit numbers: 64496 - 64511
  • 32-Bit numbers: 65536 - 65551

Source: RFC6996

The following AS numbers are reserved for private use:

  • 16-Bit numbers: 64512 - 65534
  • 32-Bit numbers: 4200000000 - 4294967294

Domain Names

Source: RFC2606

The following domain names can be used for documentation:

  • ".example" (Top-Level Domain)
  • "example.com"
  • "example.net"
  • "example.org"