St. CharlesChesterfieldMissouri (MO)
How to dial a 636 number from abroad
Calling St. Charles from outside the United States? Dial the full number in international format — you don't need the US exit code, that's only for calls made from inside the US.
International format
A 636 number looks like this when dialed from anywhere in the world:
+1 636 XXX XXXX
Other area codes in Missouri
Frequently asked questions
How do I call a St. Charles number from abroad?
Dial + (or 00 from most countries), then 1 for the US, then 636, then the 7-digit local number. So a St. Charles number reads as +1 636 XXXXXXX.
What other area codes serve St. Charles?
St. Charles is served only by area code 636 — no other code overlays this area.
How much does Hyallo charge to call area code 636?
Calls to St. Charles landlines start at $0.02/min with Hyallo, and your first call is free. Mobile numbers in the same area code can cost more, since they're billed at the real carrier rate.