The code 0890 merged Ayton (formerly 0390) with Coldstream (already on 0890) into a single area. As part of the PhONEday changes on 16th April 1995 the code became 01890. 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 | Coldstream |
| 1XXXXX | Coldstream |
| 2XXXXX | Coldstream |
| 3XXXXX | Coldstream |
| 4XXXXX | Coldstream |
| 5XXXXX | Ayton |
| 6XXXXX | Ayton |
| 7XXXXX | Ayton |
| 8XXXXX | Coldstream |
| 9XXXXX | Ayton |