That is a question I also receive frequently.
I always answer that there is no relationship with anything else and (in my opinion) ISO gives the numbers in a similar way the transit offices gives you a car plate number,... is the next number available.
If you are interested in ISO Standards you can visit:
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to the use of cookies.