RegoSearch is an online aircraft registration search service provided by Proprius Solutions. It helps aircraft spotters and aviation professionals find registration information for aircraft in Australia, New Zealand, the United States, Canada and Ireland. Users can search by registration number using matching options such as exact, partial, beginning or ending text, or browse aircraft by country. The site notes that users do not need to enter a country prefix, such as N or VH-, because RegoSearch handles it.

The service is intended for people who need aircraft details quickly, including those working in maintenance, aircraft sales and insurance. Its information may also help users researching aircraft offered for sale. Free membership lets users add comments to aircraft records and upload photos, while the site features recent community contributions. RegoSearch also provides aviation reference material, including a glossary, acronym guide, aircraft manufacturer list, information on ICAO registration prefixes and an introduction to the theory of flight. A FAQ explains how to use the search tools.