Ghana has ten geographic fixed-line area codes, 030–039 in domestic form. The map shows those regions first; named local telephone series appear when you zoom in.
Ten geographic codes. The NCA assigns 30 to Greater Accra, 31 Western, 32 Ashanti, 33 Central, 34 Eastern, 35 Brong Ahafo, 36 Volta, 37 Northern, 38 Upper East and 39 Upper West. In domestic numbers these are written with the trunk 0: 030–039. For international numbers, drop that 0 after +233.
Local series appear on zoom. The smaller labels are current fixed-line series listed by the NCA for named service areas, such as 0302 Accra and 03220 Kumasi. Their dots mark the named town, not a boundary. Ghana's six newer regions are grouped under the geographic area of the region they were split from: Western North with 031; Ahafo, Bono and Bono East with 035; Oti with 036; Savannah and North East with 037.
Sources. Numbering plan: National Communications Authority (NCA), Number Management System — area codes and active locality series. Regional code crosswalk: Ghana telephone area-code map, including the six regions created in 2018. Geometry: geoBoundaries ADM1, Ghana's 16 regions; OpenStreetMap-derived (ODbL). Locality coordinates: OpenStreetMap contributors, geocoded from NCA named service areas.