Something like the .tel domain? http://telnic.org/ You don't get to run your own server, all .tel domains are run by the same company. You just set up yourname.tel with your contact info. Example: http://mark.tel/
OTOH using some sort of central-issued IDs (NI, kennitala, PESEL, SSN, INSEE, passport number) like http://87120402424.pl.tel feels a bit dystopian...