Callsign Information
10-10 International Number Search
International Call Sign Prefix Allocations
Australian (VK) Callsign Search
Buckmaster World Wide HamCall(tm) Server
Canadian Amateur Radio Callsign Database
Czech Call Book (OK/OL)
Estonian (ES) Call Book
FCC Form 605
German Call Sign Database Look Up
The Finnish Callbook on the Web
La Nomenclature Française - French callsign database, written in French.
OH-Callbook Service - Finland.
QRZ Call Sign Database
QSL INFO SYSTEM by IK4LZH - QSL Manager info search.
Russian Call Sign Database
Seychelles QSL Info Page - S79MAD's QSL routes for S79 stations.
UALR's U.S. Amateur Radio Callsign Lookup Page - Updated daily.
WM7D's Callsign Database