Rexlar-D was an urban locale on the Gamma Quadrant planet Dosi that was the capital city of the Dominion-allied Dosi Confederation government. (ST reference: Star Charts)

Capital planets and cities
Interstellar states	Paris, Earth (United Federation of Planets) • First City, Qo'noS (Klingon Empire) • Ki Baratan, Romulus (Romulan Star Empire) • Lor'Vela, Andor (Andorian Empire) • Cardassia City, Cardassia (Cardassian Union) • Me'leit, Talar (Talarian Republic) • Rashtag, Janalwa (Holy Order of the Kinshaya) • Ab-Tzenketh (Tzenkethi Coalition) • Ferenginar (Ferengi Alliance) • Keelee-Kee, Tezwa (Tezwa) • Rexlar-D, Dosi (Dosi Confederation) • L'hur (Sikaris) • Dinaal City (Dinaal) • New Founder Homeworld (Dominion) • Unimatrix 01 (Borg Collective) • Achernar Prime (Imperial Romulan State, defunct)
Federation member states	San Francisco (United Earth) • ShiKahr (Confederacy of Vulcan) • New Samarkand (Alpha Centauri) • Ares City (Confederated Martian Colonies) • Ashalla (Republic of Bajor) • Leran Manev (Trill) • Stratos (Ardana) • Pike City (Cestus III) • Iaron (Damiano) • New Coridan (People's Republic of Coridan) • Nuvia (Risian Hedony) • Zhelnogra (Tenara) • Laikan (Andorian Empire)
Federation member state subdivisions & colonies	New Burbank (Rigel VI, United Rigel Colonies) • Rigel Trade Complex (Rigel X, United Rigel Colonies) • New Rakantha (New Bajor, Republic of Bajor) • Port Emily (Sherman's Planet) • London (United Kingdom, United Earth) • Washington, DC (United States, United Earth) • Madrid (Spain, United Earth)
Interstellar state subdivisions	Ka'Hat (Sherman's Planet, Klingon Empire) • Kecemen (Karemma Foundation, Dominion)