Africa · DX entity · DXCC 023 · deleted

Blenheim Reef

Blenheim Reef was a DX entity in Africa, in CQ zone 39 and ITU zone 41, counting for contacts from 4 May 1967 until 30 June 1975.

A deleted entity. Contacts made from 1 July 1975 no longer count for Blenheim Reef.

The map of this entity arrives with the DXEntity boundary layer.

Figure 1. Blenheim Reef. The boundary is to come. Boundaries: not yet published (GIS-Architecture, the DXEntity layer).

Data sheet

DXCC entity code	023
Name in the ADIF standard	BLENHEIM REEF
Continent	Africa
Primary prefix	none listed
CQ zone	39
ITU zone	41
Counts for contacts from	4 May 1967
No longer counts from	1 July 1975
Remarks	Continent, zones and validity from the ARRL DXCC List (deleted entities): (Blenheim Reef) Only contacts made May 4, 1967, to June 30, 1975, count for this entity. Contacts made July 1, 1975, and after, count as Chagos Is. (VQ9).

Sources: 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