The DARC Community-Logbook is a web-based logbook and helps you to apply for DARC diplomas. It was born on HAM Radio 2002 under the name "DARC Contest-Logbook". The idea is to reduce bureaucracy to a minimum through the consistent use of Internet techniques without sacrificing performance testing. By importing contest QSOs that have the log of both QSO partners, there is a lot of evidence without a QSL card available. But all other QSOs also support the DCL: Paper QSOs (called T-QSL), QSOs from eQSL and LOTW and Clublog.

As of July 2017, the DCL contains more than 140 million QSLs.The DCL can be reached at: dcl.darc.de