The 01491 phone code covers the Henley-on-Thames area, the previous BT Area was Nettlebed.
Phone numbers using this code are in the form of (01491) ### ###.
International callers should call +44 1491 ######.
The centre of the phone code area has a latitude of 51.535764 and longitude of -0.902894.
The nearest other phone codes are: Henley-on-Thames (01491) Reading (0118) Maidenhead (01628) High Wycombe (01494) Bracknell (01344)