Music
- 524
- M.C. Records
- American roots music, including Odetta, R.L. Burnside, Big Jack Johnson, Sleepy Labeef, Luther "Guitar Junior" Johnson.
- 525
- Mapleshade Records
- And studio, plus Wildchild Records. CDs releases by Sunnyland Slim, The Blue Rider Trio, Drink Small, and John Dee and Fris. Also a selection of audio products and an email mailing list.
- 526
- Moorafa Records
- Owned and operated by Seattle, Washington independent singer/songwriter Michael Guthrie. CD, bio, and audio samples available.
- 527
- Mountain Top Productions
- CDs by West Coast artists Gary Smith, Mark Hummel, Clarence "Guitar" Sims, and R.J.Mischo as well as harmonica instruction videos.
- 528
- NorthernBlues Music, Inc.
- Canadian label featuring Otis Taylor, Harry Manx, Rita Chiarelli, and Paul Reddick+The Sidemen. Artist bios, tour dates, reviews, and online ordering.
- 529
- PacificSol
- Northern California based, featuring new, original blues and rhythm and blues artists. Audio samples and online retail store available.
- 530
- Razor and Tie Records
- "From the Vault" series of reissues featuring Blues and Rhythm and Blues artists such as Arthur Alexander, Irma Thomas, and John Lee Hooker.
- 531
- Roesch Records
- Featuring Matt "Guitar" Murphy, Eddie King, Jesse Austin, and the Blues Brothers Horns.
- 532
- Serapis Records
- Official site of Zach Parrish. Includes music samples, images, tour dates, bio and press.
- 533
- Severn Records
- East Coast independent label promoting Blues and Soul. See tour schedules, photos, purchase CDs online. Artist roster includes Louisiana Red, Darrell Nulisch, and Roy Gaines.
- 534
- Sleeping Dog Records
- An independent internet-based label. Specializing in new and contemporary Chicago Blues, but offering a broad range of genres.