UK Area Code Finder
Quick and easy telephone dialling code information
01707 area code
Welwyn Garden City numbers
UK area code 01707 covers Welwyn Garden City in the county of Hertfordshire.
Other areas using 01707 numbers include Cuffley, Hatfield and Potters Bar.
Number Format
Local telephone numbers are six digits long. An 01707 number should be displayed in the format:
(01707) xxxxxx.