Asia · DX entity · DXCC 315

Sri Lanka

Sri Lanka is a DX entity in Asia, in CQ zone 22 and ITU zone 41. Its primary prefix is 4S.

Flag of Sri Lanka.

loading the map…

Figure 1. Sri Lanka and its districts, 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 0.004131 degrees, about 460 m; exported 30 October 2026. Projection: Lambert azimuthal equal-area centred on 7.9° N 80.8° E.

Data sheet

DXCC entity code	315
Name in the ADIF standard	SRI LANKA
Continent	Asia
Primary prefix	4S
CQ zone	22
ITU zone	41

Prefixes

4S is the primary prefix. The country files list 4 prefixes and prefix blocks for Sri Lanka.

Show all prefixes

4S 4P 4Q 4R

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.