Europe · DX entity · DXCC 503

Czech Republic

Czech Republic is a DX entity in Europe, in CQ zone 15 and ITU zone 28. Its primary prefix is OK.

Flag of Czech Republic.

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Figure 1. Czech Republic and its regions, with neighbouring land in grey. Hover for names; scroll to zoom. Boundaries: Natural Earth, Admin 0 Map Subunits and Admin 1 States and Provinces, 1:10m, version 5.1.2 (13 May 2022), public domain, retrieved 2026-10-15. https://www.naturalearthdata.com/. DX entity boundaries assembled by The DX Atlas Project from the sources named, one recipe row per DXCC entity (subunits matched, merged, split by box or carved from a parent; DXEntity-Recipe.md), 2026. Simplified for this page to 0.002932 degrees, about 326 m; exported 30 October 2026. Projection: Lambert azimuthal equal-area centred on 49.8° N 15.5° E.

Data sheet

DXCC entity code	503
Name in the ADIF standard	CZECH REPUBLIC
Continent	Europe
Primary prefix	OK
CQ zone	15
ITU zone	28

Prefixes

OK is the primary prefix. The country files list 2 prefixes and prefix blocks for Czech Republic.

Show all prefixes

OK OL

Sources: Jim Reisert AD1C, Big CTY country files, 15 September 2026. https://www.country-files.com/ (MIT licence); ADIF Development Group, ADIF Specification version 3.1.8 (2026-10-12), DXCC Entity Code enumeration. https://adif.org/; ARRL, DXCC List (current and deleted entities), January 2026. https://www.arrl.org/country-lists-prefixes; Flag: Flagpedia.net (flagcdn.com), SVG, public domain, retrieved 2026-10-10.