| !Blap¡ Records | | | Los Angeles, California, United States | | | |
| ¡De Volada! Records | Production | | Los Angeles, California, United States | | | |
| [ESTÉTICA CIBERNÉTICA] | Distributor | | San Francisco, California, United States | | | |
| [momoru] | | | Los Angeles, California, United States | | | |
| $TOVEY Ent. LLC | Imprint | | Pittsburg, California, United States | 2021-04-01 | | |
| 1M1 Music | Original Production | | Los Angeles, California, United States | | | |
| 2B1 | Original Production | | San Francisco, California, United States | | | |
| 2BeYoND Records | Publisher | | Los Angeles, California, United States | 2016-12-17 | | |
| 3 cords & a hook | Production | | California, United States | 2013-02-10 | | |
| 3 Monkeys Productions | Original Production | | West Hollywood, California, United States | | | |
| 3 O'Clock Rock | | | Oakland, California, United States | | | |
| 3 Palm Records | | | Los Angeles, California, United States | | | |
| 3am Devices | | | San Francisco, California, United States | 2013 | | |
| 3CM | Production | | Los Angeles, California, United States | 2016 | | |
| 4C Sound LLC | Production | | San Diego, California, United States | | | |
| 4EONS | | | Los Angeles, California, United States | | | |
| 5 Minute Walk Records Inc | Production | | Concord, California, United States | 1995 | [unknown] | |
| 5lime | Imprint | | California, United States | 2019 | | |
| 5th Amendment Entertainment, Inc. | Production | | Hawthorne, California, United States | 2004 | | |
| 7 and 7 Is Music | Publisher | | Citrus Heights, California, United States | | | |
| 7/8 Music Productions | | | San Francisco, California, United States | 1996-03 | | |
| 7th House Productions | Production | | Sacramento, California, United States | 2001 | 2002 | |
| 10K Projects | Imprint | | Los Angeles, California, United States | 2016 | | |
| 12 Inch RPM | | | Los Angeles, California, United States | | | |
| 19 Entertainment Ltd. | | | Los Angeles, California, United States | 2002-04-09 | | |
| 20 Sided Records | | | San Francisco, California, United States | | | |
| 21 Bazooka Salute | Publisher | | San Rafael, California, United States | | | |
| 24 Deep Productions | Production | | Sacramento, California, United States | | | |
| 40 Ounce Records | Original Production | | Vallejo, California, United States | 1994 | | |
| 45 RPM Records | | | Los Angeles, California, United States | | | |
| 48 Windows | Production | | Santa Monica, California, United States | 1997-04-03 | | |
| 50 Shots Beats | Publisher | | Rancho Santa Margarita, California, United States | 2017-09-27 | | |
| 75 Ark | Original Production | | San Francisco, California, United States | 1994 | 2001 | |
| 77Rise Recordings | Original Production | | San Francisco, California, United States | 2014 | | |
| 79Ancestors | | | San Francisco, California, United States | | | |
| 84 Projects | Publisher | | Los Angeles, California, United States | 2018-01-01 | | |
| 97 Bulls | Publisher | | Burbank, California, United States | | | |
| 102.7 KIIS FM | | | Los Angeles, California, United States | 1975-10-22 | | |
| 233 Studios | Original Production | | California, United States | 2019 | | |
| 333 Recordings | Original Production | | California, United States | | | |
| 360° Productions | | | Sebastopol, California, United States | | | |
| 720 Records | Publisher | | Sacramento, California, United States | | | |
| 989 Studios | Publisher | | Los Angeles, California, United States | 1995 | 2005 | |
| 1226Publishing | Publisher | | Los Angeles, California, United States | | | |
| 1753 Recordings | Original Production | | Los Angeles, California, United States | | | |
| 1917 Records | Original Production | | El Segundo, California, United States | | | |
| 1972 | Reissue Production | | Oakland, California, United States | | | |
| 2101 Records | Publisher | | Los Angeles, California, United States | 2010 | | |
| 5000 Broadway Music | Publisher | | Los Angeles, California, United States | | | |
| A 'Man Shed' Production | | | California, United States | | | |
| A Train Entertainment | Distributor | | Oakland, California, United States | 1985-01 | | |
| A World of Jazz | | | Los Angeles, California, United States | | | |
| A/B Music | Imprint | | Los Angeles, California, United States | 2018-07-17 | | |
| A&M Records | Production | LC 000485 | Hollywood, Los Angeles, California, United States | 1962 | | 4 |
| A&M Records, Inc. | Holding | | Hollywood, Los Angeles, California, United States | 1962 | | |
| A&M Video | | | Hollywood, Los Angeles, California, United States | | | |
| a2b2 Publishing | Publisher | | Citrus Heights, California, United States | | | |
| Abacus Recordings | Original Production | | Hawthorne, California, United States | 2001 | 2007-07-24 | |
| Abbott Record Co. | | | Hollywood, Los Angeles, California, United States | 1951 | 1957 | |
| Abducted LTD | Original Production | | Los Angeles, California, United States | 2014 | | |
| Abducted Records | Original Production | | Los Angeles, California, United States | 2008 | | |
| Abe Music, Inc | Original Production | | Los Angeles, California, United States | 2018 | | |
| Abject Records | Distributor | | Sacramento, California, United States | 2016-06-25 | 2017-04-16 | |
| Abject Renaissance | | | Los Angeles, California, United States | | | |
| About Our Publishing | Publisher | | Santa Monica, California, United States | | | |
| Above and Below | Publisher | | San Francisco, California, United States | | | |
| Absence Tapes | Production | | Santa Ana, California, United States | 2009 | | |
| Absinthe Records | Original Production | | Los Angeles, California, United States | 1996 | 1996 | |
| Abyss Records | | | California, United States | | | |
| Access Hip Hop Records | Imprint | | San Diego, California, United States | 2002 | 2022 | |
| Ace-Hi Hits | | | Beverly Hills, California, United States | | | |
| Acephale Winter Productions | | | Berkeley, California, United States | | | |
| Acid Camp | | | Los Angeles, California, United States | 2013 | | |
| Acid Vision Records | Original Production | | Ontario, California, United States | | | |
| Ackrite | | | San Diego, California, United States | 2009-06-06 | | |
| Acoustic Oasis | | | San Rafael, California, United States | | | |
| Acrylic Label | Imprint | | Los Angeles, California, United States | | | |
| Action Records | Original Production | | San Mateo, California, United States | | [unknown] | |
| Active Management | | | Los Angeles, California, United States | | | |
| Activision | Imprint | | Santa Monica, California, United States | 1979 | | |
| Acutrack | Production | | Livermore, California, United States | | | |
| Adeline Records | Original Production | | Oakland, California, United States | 1997 | | |
| ADHD∞INFINITY | Original Production | | Long Beach, California, United States | | | |
| AdHoc Studio | Original Production | | Los Angeles, California, United States | 2018 | | |
| Adima Artists | Publisher | | Milpitas, California, United States | | | |
| AdRev, Inc. | | | California, United States | 2011 | | |
| Advanced Perspective | | | Huntington Park, California, United States | | | |
| Adventure Cat Burmilla | Publisher | | Calabasas, California, United States | | | |
| Adventure Cat Music | Publisher | | Calabasas, California, United States | | | |
| Aerie Records / CalState L.A. | Publisher | | Los Angeles, California, United States | | | |
| Aero Space Records | Original Production | | West Hollywood, California, United States | 1967 | | |
| Aertaun | | | Riverside, California, United States | 1962 | [unknown] | |
| Afinarte Music | Original Production | | Anaheim, California, United States | 2014 | | |
| Afrobeats Africa | Distributor | | San Diego, California, United States | 2022-01-01 | | |
| Aftermath Records | Holding | | Santa Monica, California, United States | | | |
| Afternoon Umbrella Friends | | | San Diego, California, United States | | | |
| Aggravated Music | | | Glendale, California, United States | | | |
| Ah Choo Music Publishing | Publisher | | Santa Monica, California, United States | | | |
| Ah2 | Original Production | | Los Angeles, California, United States | 2003 | | |
| Ai Fridge Records | Distributor | LC 057941 | Sacramento, California, United States | 2013-04-25 | | |