| 1966-114A | B-1A |
| viz. | B-Sat |
| 1998-067A | Babylon 1 (ISS) |
| Badar viz Badr (Arabsat) | |
| viz. | Badr (Pákistán) |
| viz. | Badr (Arabsat) |
| 2010-062J | Ballast A |
| 2010-062K | Ballast B |
| 1998-012B | BATSAT |
| 1964-064A | BE-B |
| 1964-051A | BE-B |
| 1965-032A | Beacon Explorer C |
| 2009-051C | BeeSat |
| viz. | Beidou |
| 2005-043A | Beijing 1 |
| 1996-027A | BeppoSAX |
| 1992-031A | Berksat |
| 2009-038B | BEVO-1 |
| 1979-051A | Bhaskara 1 |
| 1981-115A | Bhaskara 2 |
| viz. | Big |
| 2003-042G | BiltenSat-1 |
| 2003-042G | BilSat-1 |
| viz. | Biokosmos |
| viz. | Bion |
| 1966-114A | Bios 1 |
| 1967-083A | Bios 2 |
| viz. | Biosatellite |
| 2001-049C | BIRD-1 |
| 2000-039C | BIRD-Rubin |
| 1962-067A | Black Sphere |
| 1993-026A | Blackbeard |
| 2009-049G | BLITS |
| viz. | Bluebell |
| 2006-049A | Blues |
| viz. | BMEWS |
| 2003-042E | BNSCSAT-1 |
| viz. | BNTS |
| 1998-068A | Bonum-1 |
| viz. | BOR |
| 1966-025B | BORE |
| 1969-083A | Borealis |
| 1969-083A | Boreas |
| 2010-028C | BPA-1 |
| 2011-044H | BPA-2 |
| 1985-028B | Brasil 1(T) |
| viz. | Brasilsat |
| viz. | Brazilsat |
| 1994-006H | Bremsat 1 |
| 1992-083A | Broom Hilda |
| 1995-074A | Bruno Rossi XTE |
| viz. | BS |
| 1997-016B | BS-4 F-1 |
| 1998-024B | BS-4 F-2 |
| 1989-067A | BSB-R1 |
| 1990-074A | BSB-R2 |
| 1978-039A | BSE |
| 1981-075A | Bulgaria 1300 |
| 1988-100A | Buran |
| 2008-047G | BX-1 |