The 01207 national dialling code for Consett in the United Kingdom. The area it serves includes almost the entire former district of Derwentside. When STD codes were first introduced, Consett was assigned 0207. The current 01207 code became active as part of PhONEday on 16 April 1995. In common with all other British area codes the initial '0' is a trunk prefix that is not required when dialling Consett from abroad. History When STD codes were initially assigned, Consett was given the mnemonic code CO7 (corresponding to 207 on the rotary dial). With the transition to all-figure dialling which ended the practice of representing STD codes with letters in 1966, and including the trunk prefix, this became 0207. Before STD The exchanges were: Changes in the 1960s and 1970s Following the introduction of STD in 1958, most 4 digit and 3 digit exchanges were prefixed as follows; some exchanges were consolidated into others. Consett – 4 digit numbers became 6 digits and prefixed with 50 Stanley – 4 digit numbers became 5 digits and prefixed with 3 Dipton 020,753 – 3 digit numbers became 6 digits and prefixed with 570 Burnopfield – 3 digit numbers became 5 digits and prefixed with 70 Ebchester 020 76 – 3 digit numbers became 6 digits and prefixed with 560 Lanchester – 3 digit numbers became 6 digits and prefixed with 520 Edmundbyers 020,755 – 3 digit numbers became 5 digits and prefixed with 55 – The original code for Edmundbyers was 020,755 Castleside 020,754 numbers were integrated into Consett telephone exchange and prefixed with 509: Castleside 201 became Consett 509201 (13 July 1977) Chopwell 020,751 numbers were integrated into Ebchester telephone exchange and prefixed with 561: Chopwell 201 became Ebchester 561201 (8 November 1978) Annfield Plain numbers were integrated into Stanley telephone exchange and prefixed with 34: Annfield Plain 201 became Stanley 34201 (18 April 1972) Shotley Bridge numbers were integrated into Consett telephone exchange (29 September 1965) Changes in the 1980s In the 1980s a new wave of prefixes were introduced in the area code: Rowlands Gill – 4 digit numbers became 6 digits and prefixed with 54 Stanley – 5 digit numbers became 6 digits and prefixed with 2 Edmundbyers – 5 digit numbers became 6 digits and prefixed with 2 Burnopfield – 5 digit numbers became 6 digits and prefixed with 2 In the 1980s, BT planned to rename all