NI on a licence plate

NI is an area code in 4 countries. The plate's style and country code tell them apart.

Germany
NI-AB 1234
Nienburg/Weser (Lower Saxony)
Code details →
Greece
NI-1234
Thessaloniki
Code details →
Serbia
NI 123-AB
Doljevac (Nišava District), Gadžin Han (Nišava District), Merošina (Nišava District), Ražanj (Nišava District), Svrljig (Nišava District), Niš (Nišava District)
named after Niš
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Slovakia
NI 123AB
Nitra (Nitra Region)
Code details →