Customs offices with their contacts details, working hours and competence for placing of goods under customs regime:

https://customs.bg/wps/wcm/connect/customs.bg28892/43afac7d-b359-43dc-baea-be98a9092c2b/TD_%D0%9Aoordinati_31-10-2024.pdf?MOD=AJPERES&CACHEID=ROOTWORKSPACE.Z18_PPGAHG8001RHE0Q9LC7JNOQLD4-43afac7d-b359-43dc-baea-be98a9092c2b-pbxRRfO

Link to the UN International TIR Data Bank - search engine for customs offices processing TIR carnets

Click on the customs office number (office ID) to see contact details and map location:

https://itdb.unece.org/public/officeIndex