The 01389 phone code covers the Dumbarton area.
Phone numbers using this code are in the form of (01389) ### ###.
International callers should call +44 1389 ######.
The centre of the phone code area has a latitude of 55.945287 and longitude of -4.564554.
The nearest other phone codes are: Dumbarton (01389) Helensburgh (01436) Johnstone (01505) Greenock (01475) Killearn (01360)