PostNL tracking URL from a tracking number

PostNL (NL) tracking numbers follow this format: matches `^(3S)?[A-Z0-9]{10,13}$`, or S10 format ending in NL. ShipShim detects the carrier from the number and returns the direct tracking link.

Example: number in, tracking URL out

Example tracking numberRR474519394NL
Tracking URLhttps://www.postnl.nl/tracktrace/?B=RR474519394NL

This format is distinctive, so ShipShim identifies PostNL from the bare number — no hints needed.

Get the PostNL tracking link via API

curl -X POST https://shipshim.com/api/v1/track \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"tracking_number": "RR474519394NL"}'

Response:

{
    "tracking_number": "RR474519394NL",
    "carrier": "PostNL",
    "country": "NL",
    "tracking_url": "https://www.postnl.nl/tracktrace/?B=RR474519394NL",
    "confidence": 100,
    "matches": [
        {
            "carrier": "PostNL",
            "country": "NL",
            "confidence": 100,
            "tracking_url": "https://www.postnl.nl/tracktrace/?B=RR474519394NL"
        }
    ]
}

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