David Wang
-Updated on June 24, 2026
What does a PostNL tracking number look like?
Domestic parcels usually carry a barcode that begins with 3S (some flows start with 2S or KG), followed by a mix of letters and numbers, for example 3SABCD1234567. International letters and registered items often use the Universal Postal Union S10 format: two letters, nine digits, and the country code NL, for example RR123456789NL.
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