For operators in the field or at remote "POTA" (Parks on the Air) sites, offline-capable apps are essential. Find QTH Locator / Maidenhead Locator online - QSL.design

In the world of amateur radio, knowing your exact position is about more than just geography—it is a core part of operating, contesting, and antenna alignment. A , also known as a Maidenhead locator , is a concise code that represents your location using a grid system.

A 4-character locator defines a large "square" (roughly 70x100 miles in the US), while a 6-character locator provides a precision of roughly 3x4 miles.

The term originates from Morse code "Q-signals" and simply means "My location". The Maidenhead Locator System replaces cumbersome latitude and longitude coordinates with a short, alphanumeric string, such as FN31 .