| 1 | RGN | Berlin European U.K. Ltd. | IATA: WZ, Callsign: Regional, Formerly Berlin Regional (UK) Ltd. Sold / intergrated into Germania on 01 April 1991. | GB | AVCODES |
| 2 | RGN | Cygnus Air, S.A. | IATA: Y2, Callsign: Cygnus Air, IATA Prefix: 571, Name changed from Regional Lineas Aereas. ICAO callsign changed from Regional Lineas. Designator XG* recalled by IATA | E | AVCODES |
| 3 | RGN | Berlin European U.K. Ltd. | IATA: FB, Callsign: Regional, IATA Desigantor changed to WZ | GB | AVCODES |
| 4 | RGN | Corporacion Ygnus Air, S.A. | Callsign: Cygnus Air, Designator Y2* recalled by IATA. Name changed from Regional Lineas Aereas. ICAO callsign changed from Regional Lineas. Designator XG* recalled by IATA | E | AVCODES |
| 5 | RGN | Cygnus Air | | | ICAO1 |
| 6 | RGNA | RAGONA, DON TRUCKING | | | SCAC3 |
| 7 | RGNB | ROGERS & BROWN | | | SCAC4 |
| 8 | RGNC | REGENCY MOVING & STORAGE CO INC | | | SCAC4 |
| 9 | RGND | REGENCY TRANSPORTATION INC (DEDICAT | | | SCAC4 |
| 10 | RGNE | REGAN, ED PRINTING MACHINERY MOVERS | | | SCAC3 |
| 11 | RGNE | REGENCY EXPRESS CO LTD, THE | | | SCAC4 |
| 12 | RGNH | RAGNHILD SHIPPING COMPANY LIMITED | | | SCAC3 |
| 13 | RGNH | REGIONAL HAULAGE | | | SCAC4 |
| 14 | RGNL | REGIONAL TRANSPORTATION INC | | | SCAC3 |
| 15 | RGNL | RIGAR INTERNATIONAL | | | SCAC4 |
| 16 | RGNM | REGENTIK TRUCKING | | | SCAC3 |
| 17 | RGNO | RIGGINS INC | | | SCAC4 |
| 18 | RGNQ | REGAN, DENNIS EQUIPMENT RENTAL | | | SCAC3 |
| 19 | RGNQ | REGENCY MOVING & STORAGE CO INC | | | SCAC4 |
| 20 | RGNS | RAMSAY, GEORGE & SONS INC | | | SCAC4 |
| 21 | RGNT | REGENCY TRANSPORTATION INC | | | SCAC3 |
| 22 | RGNT | REGENCY TRANSPORTATION INC | | | SCAC4 |
| 23 | RGNX | RAILGON COMPANY | | | PWRC |
| 24 | RGNX | TTX COMPANY | | | SCAC4 |
| 25 | RGNY | REGENCY LIMITED | | | SCAC3 |
| 26 | RGNY | ROOTED & GROUNDED NURSERY LLC | | | SCAC4 |
