The code 0423 merged Boroughbridge exchanges (formerly 0902X) with Harrogate (already on 0423) into a single area. As part of the PhONEday changes on 16th April 1995 the code became 01423. Numbers within each area can be identified by the first digit of the number after the code as shown below. Calls between these two areas (except numbers beginning 0 or 1) can be made without using the code.
Numbers |
Area |
| 0XXXXX | Harrogate |
| 1XXXXX | Harrogate |
| 2XXXXX | Harrogate |
| 3XXXXX | Boroughbridge |
| 4XXXXX | Boroughbridge |
| 5XXXXX | Harrogate |
| 6XXXXX | Harrogate |
| 7XXXXX | Harrogate |
| 8XXXXX | Harrogate |
| 9XXXXX | Boroughbridge |