Private IP Address 172.16.16.27

172.16.16.27 belongs to the private IP address space 172.16.0.0-172.31.255.255 (172.16.0.0/12).

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 172.16.0.0/12 for private use in February 1996 as noted in RFC 1918. It consists of a series of 16 contiguous class B networks with a prefix length of 16 bits each and spans 1,048,576 (16 × 216) IP addresses ranging from 172.16.0.0 to 172.31.255.255. However it is not uncommon to use only a part of the available address space for a private network, for example the smaller subnet 172.16.0.0/24 with 256 hosts. If you want to learn more about IP subnetting we encourage you to take a look at our subnet calculator.

Trace an Email Address

IANA (Internet Assigned Numbers Authority) IPv4 Address Space Allocation for Subnet 172.0.0.0/8

  • IPv4 Address Space Prefix
    172/8
  • Regional Internet Registry (RIR)
    Administered by ARIN
  • Allocation Date
  • WHOIS Server
    whois.arin.net
  • RDAP (Registration Data Access Protocol) Server
    https://rdap.arin.net/registry, http://rdap.arin.net/registry
  • Status
    LEGACY
    Allocated by the central Internet Registry (IR) prior to the Regional Internet Registries (RIRs). This address space is now administered by individual RIRs as noted, including maintenance of WHOIS Directory and reverse DNS records. Assignments from these blocks are distributed globally on a regional basis.
  • Notes

172.16.16.27 IP Address Representations

  • CIDR Notation
    172.16.16.27/32
  • Decimal Notation
    2886733851
  • Hexadecimal Notation
    0xac10101b
  • Octal Notation
    025404010033
  • Binary Notation
    10101100000100000001000000011011
  • Dotted-Decimal Notation
    172.16.16.27
  • Dotted-Hexadecimal Notation
    0xac.0x10.0x10.0x1b
  • Dotted-Octal Notation
    0254.020.020.033
  • Dotted-Binary Notation
    10101100.00010000.00010000.00011011

Tips