I just tried mdecoder.com and it worked very fast and accurately. Something is very intermittent about it though. I was using Safari on an iPad7. Yesterday other people were having trouble with mdecoder on another thread.
I ran into the same error. The only thing I can think of is they are discourAging people from using it for mass vin checks. I waited a week and it worked but when I started doing multiple vins again the error cam up.
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