North America · DX entity · DXCC 037

Cocos Island

Cocos Island is a DX entity in North America, in CQ zone 7 and ITU zones 11 and 12. Its primary prefix is TI9.

Flag of Costa Rica.

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Figure 1. Cocos Island. 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. At the full detail of the source; exported 30 October 2026. Projection: Lambert azimuthal equal-area centred on 5.5° N 87.1° W.

Data sheet

DXCC entity code	037
Name in the ADIF standard	COCOS I.
Continent	North America
Primary prefix	TI9
CQ zone	7
ITU zone	11, 12

Prefixes

TI9 is the primary prefix. The country files list 2 prefixes and prefix blocks for Cocos Island.

Show all prefixes

TI9 TE9

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.