255.255.255.255 Reserved IP Address - Broadcast address (limited broadcast)

An IP address, like 255.255.255.255, is a unique identifier for a device on the internet. Think of it as a digital street address that allows devices to send and receive information over a network.

Technically, an IP address is a string of numbers that can be represented in different formats like binary or hexadecimal. However, the most common format you will see is dot-decimal notation, as shown below.

How to Read an IP Address

• Four-Part Structure: A standard IPv4 address is always made up of four numbers separated by dots (periods). Addresses with fewer or more than four parts, like 255.255.255 or 255.255.255.255.1, are invalid.
• Number Range (0-255): Each of the four numbers must be between 0 and 255. An address containing a number larger than 255, such as 255.255.255.256, is invalid.
• Standard Separator: While you might occasionally see spaces or hyphens used (e.g., 255-255-255-255 or 255 255 255 255), the official and correct separator is a dot, as in 255.255.255.255.

To learn more about how IP addresses work, check out our full guide: What Is an IP Address?

The IP address 255.255.255.255 is a reserved address, not a public one. This means it cannot be used on the public internet and is instead set aside for a special purpose.

Internet standards organizations have set aside certain IP address blocks for these special uses. The table below lists the major reserved address ranges for IPv4.

IPv4 Reserved Address Ranges

For a complete list that also includes reserved IPv6 addresses, please refer to the Wikipedia article on Reserved IP Addresses.

The address 255.255.255.255 cannot be used as a private IP address for a router's login page. To understand why, it helps to know how IP addresses are classified.

IP addresses fall into three main functional categories:

• Public IPs: Unique addresses used on the global internet, assigned by official registries.
• Private IPs: Addresses reserved by IANA for use inside local networks (like a home or office). Routers use these for their login page.
• Other Reserved IPs: Addresses reserved for special technical purposes (e.g., network testing, multicasting). They are not for general use.

The image above illustrates the general difference between public and private IP usage.

Private IP Address Ranges

The specific ranges designated by IANA for private use are:

Since 255.255.255.255 does not fall within any of these designated private ranges, it is classified as a reserved address for special use, not a private address suitable for a router.

Note: Forcibly configuring a router to use 255.255.255.255 as its address will likely cause IP conflicts or other network errors, preventing it from functioning correctly.

The IP address 255.255.255.255 is part of the 255.255.255.255/32 private address block, a range defined by RFC 1918 for use on internal networks. This specific block spans from 255.255.255.255 and contains a total of 1 addresses. As a private IP range, it is not routable on the public internet.

255.255.255.255 is the 255.255.255.255/32 address, which is the 'limited broadcast' address in IPv4. The special feature of this address is that it is specifically used to broadcast data to all devices in the local network. Specifically, broadcast packets using this address will not be routed to other subnets but will only be sent to all hosts in the current network. The limited broadcast address is typically used in network initialization, device discovery, and some basic network protocols. For example, in the DHCP handshake process, clients may send requests to 255.255.255.255 to find DHCP servers. This address is a very important part of the local area network, especially when there is no router and devices need to obtain information through broadcast.

The short answer is no. The geographic location of the IP address 255.255.255.255 cannot be determined because it is not a public IP address.

Here's a breakdown of why, based on the three types of IP addresses:

• Public IP Addresses: These are used on the public internet and can be traced to a specific geographic location, usually down to the city level.
• Private IP Addresses: These are used within local networks (like your home or office) and have no geographic location data associated with them.
• Reserved IP Addresses: Like private IPs, these are set aside for special technical purposes and do not correspond to a real-world geographic location.

You can use a WHOIS lookup to find the organization responsible for an IP address, including contact details like the administrator's name and phone number.

For example, a WHOIS lookup for the IP address 255.255.255.255 provides the following key details:

• Administrative Agency: SPECIAL-IPV4-FUTURE-USE-IANA-RESERVED
• Description: Addresses starting with 240 or a higher number have not been allocated and should not be used, apart from 255.255.255.255, which is used for "limited broadcast" on a local network. This block was reserved by the IETF, the organization that develops Internet protocols, in the Standard document and in RFC 1112. The documents can be found at: http://datatracker.ietf.org/doc/rfc1112
• Country/Region:
• Address: 12025 Waterfront Drive Suite 300 Los Angeles CA 90292 United States
• Administrator: Internet Assigned Numbers Authority
• Tel: +1-310-823-9358
• E-mail: res-ip@iana.org

The WHOIS system was created so that network operators and the public can find the person or organization responsible for a network resource. This is crucial for troubleshooting technical problems (like an ISP needing to report a fault) and for reporting network abuse, such as contacting an administrator to stop spam coming from a specific IP address.

More Articles:

• WHOIS Contact Info for 255.255.255.255
• What is IP WHOIS information?
• What is IP WHOIS information used for?
• What do the IP WHOIS fields mean?