| 1 | MBR | Brazilian Navy Aviation | Callsign: Brazilian Navy, | BR | AVCODES |
| 2 | MBR | Brazilian Navy Aviation | | | ICAO1 |
| 3 | MBRB | M BORDER SOLUTIONS | | | SCAC4 |
| 4 | MBRC | MARIANA & BLOUNTSTOWN RAILROAD CO. | | | PWRC |
| 5 | MBRD | MABRAND CARRIERS INC | | | SCAC4 |
| 6 | MBRE | MILLER, BOB RIGGING INC | | | SCAC4 |
| 7 | MBRI | MATHER BROS INC | | | SCAC4 |
| 8 | MBRK | MAGIC BROKERAGE INC | | | SCAC4 |
| 9 | MBRM | McCAMBRIDGE BROS. MATERIAL SUPPLIES | | | SCAC1 |
| 10 | MBRM | MEZA BARRAGAN, JOSE MANUEL | | | SCAC4 |
| 11 | MBRO | MAIN BROTHERS OIL CO INC | | | SCAC4 |
| 12 | MBRQ | M I H BROKERS | | | SCAC4 |
| 13 | MBRR | Meridian & Bigbee R.R. Co. | 1/1975-1/1980 | | NAKINA |
| 14 | MBRR | Meridian & Bigbee R.R. Co. | 1/75-1/80 | | NRHS |
| 15 | MBRR | M & B RAILROAD [MERIDIAN & BIGBEE RR CO.] | | | PWRC |
| 16 | MBRR | Meridian and Bigbee Railroad | | | RSRV |
| 17 | MBRR | MBR TRANSPORT INC | | | SCAC4 |
| 18 | MBRR | Meridian & Bigbee R.R. Co. | | USA | TRAFFIC |
| 19 | MBRS | MARYS BEARS | | | SCAC4 |
| 20 | MBRT | M-BAR QUARTER HORSES | | | SCAC4 |
| 21 | MBRU | MUNTERS DO BRASIL IND ECOM LTDA | | | SCAC4 |
| 22 | MBRX | Moseley Bros. Refrigerator Express | 7/1923 | | NAKINA |
| 23 | MBRX | *MOSELEY BROS. REFRIGERATOR EXPRESS | | | PWRC |
| 24 | MBRX | *MILFORD-BENNINGTON RAILROAD CO. | | | PWRC |
