I guess next step would be to brute force a bunch of check functions (I tried against the ones we have in our repo once).Īnyways adding another new LS format with no check digit algo shortly (or next week). If anyone knows how to reverse engineer hash functions, I'd love to learn how to figure out the function that generates lasership tracking numbers. My guess is they randomly choose the 9th digit and have "counters" running one per digit. The heatmap shows that digits 10 to end are pretty random, so possible lasership is in fact using some sort of counter. Second picture is the heatmap for digits 9 to 15. Color is the number of times that digit appeared.įirst picture is the heatmap for all digits in barcode. X axis is the index in the barcode string. I dug a tiny little bit further looking at distribution of each digit for each position in the barcode. Slightly less surprising, but the correlation with time still suggests some kind of counter exists. The second pic below shows digits 10 through 15. The pic below shows digits 9 through 15 of a 15 digit 1LS7 barcode. However, digit 9 itself might be randomly chosen. The digits at index 9: look like they are incremental with time, because I correlated them with an incremental ID in our system that roughly matches passing of time. Perhaps these numbers are a LaserShip shipping center location, though. Several weren't found, and of zipcodes that were "valid" they were from kind of random places like Sherrill, NY (least populated town in NY)). The rebranding includes a new name, logo, website, and visual identity. What's the difference between LaserShip and Ontrac LaserShip and OnTrac, two leading e-commerce parcel carriers, recently rebranded as 'OnTrac' to market their services together. (I cross referenced with a list of known zipcodes. You'll get your latest shipment status from here. On 15 digit 1LS7 numbers, the digits at index 4:9 look like zip codes but aren't. Sometimes, LaserShip location tracking may not update after a long time, even though its not in a multi-day transit.
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