Twilio works with phone companies across the globe; this is not something that would be that difficult for a company of their size to implement (even if it mean

Twilio works with phone companies across the globe; this is not something that would be that difficult for a company of their size to implement (even if it means one employee whose job it is to keep this up to date). Consider that the timezone database (a similar problem) is administered by one person (a volunteer no less)