Clearing out the CD tower? Discs, cases and box sets go in my covered 24/7 drop box on Edith Blvd NE, scratched or not, along with DVDs and records. A bigger collection gets free pickup across the Albuquerque metro; text 505-250-3804.
The numbers printed on every CD
Books have ISBNs; CDs have a small pile of identifiers that most tools ignore:
- DIDX numbers (“DIDX-2113”) — Sony’s disc-master ID, molded into the hub ring of the disc itself and often printed under the barcode. When a disc has lost its case, this is frequently the only identifier left.
- Catalog numbers (“CK 40999”) — the label’s own number on the spine and disc face.
- Barcodes (UPC/EAN) — when you have the case, this is the strongest match.
- Club numbers (“D 100462”) — BMG / Columbia House music-club pressings carry their own D-prefixed numbers that standard barcode scanners return nothing for. Coverage for these in open databases is thin; I’m building a fuller resolver for exactly this gap, and the miss card points you to the best manual search meanwhile.
Who this is for
Anyone sorting discs at scale: estate cleanouts, thrift hauls, media resellers, and donors deciding what’s worth passing along. Type the number, get artist and album, copy, and search your marketplace of choice — the same ten-key workflow as the LCCN Lookup for pre-ISBN books. Results come from the open MusicBrainz database; it’s an identification tool, not an appraisal.
Clearing out a CD collection in the Albuquerque area? Donate the CDs — free pickup across the metro, scheduled by route, or the 24/7 drop box at 5445 Edith Blvd NE.
Questions
What is a DIDX number?
DIDX is Sony DADC's disc-mastering identifier, assigned per disc master since the mid-1980s. It's molded into the clear hub ring of the CD and usually printed beneath the barcode. Because it identifies the pressing master, it's often the only usable identifier on a caseless disc.
Why does my BMG or Columbia House CD scan as nothing?
Music-club pressings carry the club's own catalog numbers (like 'D 100462') and sometimes club-specific barcodes that ordinary product databases never indexed. That's the gap this tool is built to close; club coverage in open databases is still growing.
Where do the results come from?
The open MusicBrainz database (no account, no tracking). Cover art comes from the Cover Art Archive. When a number isn't cataloged yet, the tool links you to the best manual search instead of guessing.