Currently, any request with coordinates pointing to Northen Cyprus, returns no country code.

Its entry inborders.json does indeed have no codes specified:

{"type":"Feature","properties":{"wikidata":"Q23681","nameEn":"Northern Cyprus","groups":["Q644636","145","142"      ],"driveSide":"left","callingCodes":["90 392"      ]   },...},

However, even though the Turkish Republic of Northern Cypr is politically separated from Cyprus (Republic of Cyprus), it should share the same country codeCY. Here's why:

• There is no entry for TRNC in theISO 3166-1
• The entry ofCyprus contains a subitem for each of the 6 districts. 2 of these actually form TRNC: