The initial Brown Corpus had only the words themselves, plus a location identifier for each.

FAA location identifier for Perry County Airport (Tennessee)

However it survives on the railways of the United Kingdom as a location identifier.

Kake Airport (FAA location identifier)

This unit still exists as a location identifier on British railways, as well as in some areas of Australia and America.

The system displays the location identifier next to communication frequencies when selected from the database and identifies the Morse code ID for navigation frequencies.

In some countries such as Spain or the United States, highway Exit number are identified using location identifiers.

Some helipads may have location identifiers from multiple sources.

The internal index is in fact composed of the 128-bit hash of the peer name and a 128-bit location identifier, derived from an IPv6 address of the node.

The airport's former FAA location identifier was X47.