| 1 | ANI | Air Atlantic (Nig) Limited | Callsign: Nigalantic, | WAN | AVCODES |
| 2 | ANI | Aeronica, Aerolineas Nicaraguenses S.A. | IATA: NI, Callsign: Aeronica, Name changed from Lineas Aereas Nicaragus | NIC | AVCODES |
| 3 | ANI | Air Atlantic (Nig) Limited | | | ICAO1 |
| 4 | ANIB | ANTONINI BROS INC | | | SCAC3 |
| 5 | ANIB | ANTONINI BROS INC | | | SCAC4 |
| 6 | ANIC | ANDICO INC | | | SCAC3 |
| 7 | ANIC | AGONIC MARINE INC | | | SCAC4 |
| 8 | ANID | A & I DISTRIBUTORS | | | SCAC3 |
| 9 | ANIE | ARMELLINI INC | | | SCAC3 |
| 10 | ANII | ACTION INDUSTRIES INC | | | SCAC3 |
| 11 | ANIJ | ALLIANCE INTERNATIONAL | | | SCAC3 |
| 12 | ANIJ | ALLIANCE INTERNATIONAL | | | SCAC4 |
| 13 | ANIK | AMERICAN CANADIAN CARIBBEAN LINE IN | | | SCAC4 |
| 14 | ANIL | ANILUK FREIGHT LINES INC | | | SCAC3 |
| 15 | ANIN | ANANIAN TRUCKING | | | SCAC3 |
| 16 | ANIO | AIR CONNETION | | | SCAC4 |
| 17 | ANIP | ANATOLI SHIPPING CORPORATION | | | SCAC3 |
| 18 | ANIP | ANNSTER INCORPORATED | | | SCAC4 |
| 19 | ANIQ | AGENT NATIONAL INC | | | SCAC4 |
| 20 | ANIS | A & I SUPPLY CO INC | | | SCAC3 |
| 21 | ANIS | ARDENNISON INC | | | SCAC4 |
| 22 | ANIT | A N T INC | | | SCAC3 |
| 23 | ANIU | TRANSANAVE SHIPPING BV | | | SCAC3 |
| 24 | ANIV | ATLANTIC VAN LINES | | | SCAC3 |
| 25 | ANIX | Asociacion Nacional de la Industria Quimica, A.C. | added 7/2002; eliminated 10/2002; 7/2005 (not listed) | | NAKINA |
| 26 | ANIX | ASSOCIACION NATIONAL DE LA INDUSTRIA QUIMICA, A.C. | | | PWRC |
| 27 | ANIX | Associacion National de la Industria Quimca, A.C. | | | RSRV |
| 28 | ANIX | ASOCIACION NACIONAL DE LA INDUSTRIA | | | SCAC4 |
