Part of the border between Angola and Zambia is defined by the meridian.
When Svalbard (in the North) and Antarctica (in the South) are added it crosses 28 territories.
From North to South: Norway, Finland, Sweden, Estonia, Latvia, Lithuania, Russia (Kaliningrad), Poland, Slovakia, Ukraine, Hungary, Romania, Serbia, Bulgaria, North Macedonia, Greece, Libya, Chad, Sudan, Central African Republic, Congo Democratic Republic, Angola, Zambia, Namibia, Botswana and South Africa.
The line could be drawn from Tappeluft in Norway (the most northern town on mainland on this meridian) to George in South Africa (the most southern city on this meridian) which is 11,573 km.
Halfway both meridians, on 22.5° EL, those missing countries are on the line.