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Example values

DNS Domains

As described in RFC 2606 ↗ and RFC 6761 ↗, a number of domains such as example.com and example.org are maintained for documentation purposes. Sometimes you also need to differentiate between a customer domain and your own application domain, so Cloudflare has also registered some domains for you to use.

Examples:

  • example.com
  • example.org
  • myappexample.com
  • mycustomerexample.com

IANA also maintains more example domains in their domain names documentation ↗.

IPv4 ranges

According to the Internet Engineering Task Force (IETF), there are specific IPv4 ranges used for documentation ↗:

Examples:

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

These IP addresses are reserved and will not take anyone to live origins.

Autonomous System Numbers (ASNs)

According to the Internet Assigned Numbers Authority (IANA), there are specific ASN ranges reserved for documentation ↗:

  • 64496-64511 (16-bit ASN range)
  • 65536-65551 (32-bit ASN range)