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