One of those things you need to consider if you want to be really global
I sometimes wonder how many databases and bespoke software systems would be easier to use to support international customers if their developers had actually checked what the ISO/UN standards on things like telephone numbers (mobile or landline) are.
2 and 3 letter abbreviations are available, as is telephone number length and IIRC standards for name lengths as well. as opposed to using roll your own homebrew versions.