The code 0507 merged Alford (formerly 0521) and Horncastle exchanges (formerly 0658X) with Louth (already on 0507) into a single area. As part of the PhONEday changes on 16th April 1995 the code became 01507. 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 | Louth |
| 1XXXXX | Louth |
| 2XXXXX | Horncastle |
| 3XXXXX | Louth |
| 4XXXXX | Alford |
| 5XXXXX | Horncastle |
| 6XXXXX | Louth |
| 7XXXXX | Louth |
| 8XXXXX | Alford |
| 9XXXXX | Alford |