Antigua and Barbuda

#189 of 193 countries

26844822632272832

That piece first turns up at decimal place 28,820,161,277 of π (about 28.8 billion digits in).

Antigua and Barbuda is 17 digits on the keypad. We look up at most 10 digits at a time, so it is ranked by its longest piece we found: the 10 digits 2684482263.