The code 0388 merged Stanhope exchanges (formerly 0956X) with Bishop Auckland (already on 0388) into a single area. As part of the PhONEday changes on 16th April 1995 the code became 01388. 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 | Bishop Auckland |
| 1XXXXX | Bishop Auckland |
| 2XXXXX | Stanhope |
| 3XXXXX | Bishop Auckland |
| 4XXXXX | Bishop Auckland |
| 5XXXXX | Stanhope |
| 6XXXXX | Bishop Auckland |
| 7XXXXX | Bishop Auckland |
| 8XXXXX | Bishop Auckland |
| 9XXXXX | Bishop Auckland |