What is the country code and area code for Darlington UK?

The country code for the UK is +44. The area code for Darlington in UK domestic format is 01325, which becomes +44 1325 in international format.

The plus sign means "insert your international access prefix here"; '00' is the most commonly used prefix, but many countries use other prefixes. On a GSM mobile phone, you can also enter the number in international format, beginning with the plus sign, and let the mobile network automatically insert any needed prefix(es).