I recently ran into this nifty little tool to verify if your Vendor has sent you a legit tracking number. Since more often than not vendors send numbers that are fake, to get away with selectively scamming and blame it on the customs.
https://post-tracking.com/tracknumber_validation
It is based on the prinicple, which can be found on Wikipedia
Check-digit calculation
- Ignore the Service Indicator Code and Country Code
- Assign the weights 8, 6, 4, 2, 3, 5, 9, 7 to the 8 digits, from left to right
- Calculate S, the sum of each digit multiplied by its weight.
- For example, for the number 47312482, S = 48 + 76 + 34 + 12 + 23 + 45 + 89 + 27 = 200
- Calculate the check digit, C, from C = 11 - (S mod 11)
- If C = 10, change to C = 0
- If C = 11, change to C = 5
- For the example 47312482 C = 11 - (200 mod 11) = 11 - 2 = 9
P.S. This is in context to one vendor 'YourDrug'. Might post about it, depending on how the issue proceeds =x
Okay, so this tells you if it's a real tracking number. Still doesn't do anything in the line of telling you whether it's actually your tracking number or not.