Peterlee Postcode - County Durham UK. Peterlee Postcode is a six-character string that forms part of a postal address in County Durham, England - UK. Like Dutch postcodes, Peterlee - County Durham Postcodes are alphanumeric. Peterlee Grid reference is. They are divided into two parts separated by a . How to find your postcode. Get a full postcode in Peterlee, England by clicking on the interactive map or found your outward post code on our list above. Also available, address search for postcodes. Just enter your address into the search bar to locate the postal code you need for your mail. Missing/incorrect postcodes in Peterlee? I try my best to keep the data accurate and up-to-date, but there are often cases where information is either missing or inccurate, so I appreciate all the help I can get. If you have any additional information about Postcodes in Peterlee, Durham, please contact me.