Private IP Address belongs to the private IP address space (

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A private IP address is, in contrast to a public IP address, not allocated to a specific organization, but can be used by anyone without approval from a regional Internet registry. Private IP addresses can only be reached within a closed network and are not directly accessible from the outer Internet. On the one side this is considered a security enhancement because an external Internet host cannot directly communicate with an internal host. On the other side this works again IPv4 address depletion as many companies and individuals only need a single public IP address from their ISP, and still can access the Internet with more than one computer, smartphone, or other Internet connected devices simultaneously. To find out what external IP address your router is using please go to the My IP page.

IANA has allocated the subnet for private use in February 1996 as noted in RFC 1918. It's a single class A network with a prefix length of 8 bits and spans 16,777,216 (224) IP addresses ranging from to However it is not uncommon to use only a part of the available address space for a private network, for example the smaller subnet with 256 hosts. If you want to learn more about IP subnetting we encourage you to take a look at our subnet calculator.

IANA IPv4 Address Space Allocation for Subnet

IPv4 Address Space Prefix010/8
Regional Internet Registry (RIR)IANA - Private Use
Allocation Date
Designated by the IETF (Internet Engineering Task Force) for specific non-global-unicast purposes as noted.

Reserved for Private-Use Networks RFC1918.

Complete registration details for are found in IANA IPv4 Special-Purpose Address Registry. IP Address Representations

CIDR Notation10.0.0.6/32
Decimal Notation167772166
Hexadecimal Notation0x0a000006
Octal Notation01200000006
Binary Notation 1010000000000000000000000110
Dotted-Decimal Notation10.0.0.6
Dotted-Hexadecimal Notation0x0a.0x00.0x00.0x06
Dotted-Octal Notation012.00.00.06
Dotted-Binary Notation00001010.00000000.00000000.00000110

Common Typing Errors for

You might encounter misspelled IP addresses containing "o", "l" or "I" characters instead of digits. The following list includes some typical typing errors for

  • 10.0.o.6
  • 10.o.0.6
  • 10.o.o.6