David Wang
-Updated on June 26, 2026
What does a Slovenia Post tracking number look like?
Most Slovenia Post tracking numbers are 13 characters in the Universal Postal Union S10 format: two letters, nine digits, and the country code "SI" (for example, RR123456789SI). The first letter signals the service class, such as "R" for registered, "E" for EMS/express, and "C" for an international parcel. Domestic parcels may instead use a longer all-numeric Pošta Slovenije parcel number.
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