Democratic Republic of the Congo

#166 of 193 countries

3366272842737825426384326646

That piece first turns up at decimal place 4,709,275,062 of π (about 4.7 billion digits in).

Democratic Republic of the Congo is 28 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 3366272842.