Africa · DX entity · DXCC 256

Madeira Island

Madeira Island is a DX entity in Africa, in CQ zone 33 and ITU zone 36. Its primary prefix is CT3.

Flag of Portugal.

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Figure 1. Madeira Island and its autonomous regions. 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 0.003437 degrees, about 383 m; exported 30 October 2026. Projection: Lambert azimuthal equal-area centred on 31.6° N 16.6° W.

Data sheet

DXCC entity code	256
Name in the ADIF standard	MADEIRA IS.
Continent	Africa
Primary prefix	CT3
CQ zone	33
ITU zone	36

Prefixes

CT3 is the primary prefix. The country files list 9 prefixes and prefix blocks for Madeira Island.

Show all prefixes

CT3 CQ2 CQ3 CQ9 CR3 CR9 CS3 CS9 CT9

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.