The code 0851 merged Great Bernera exchanges (formerly 0850X) with Stornoway (already on 0851) into a single area. Initially the Great Bernera exchanges were migrated as 3 digit ranges beginning with 7, before changing to 6 digit ranges beginning with 6. As part of the PhONEday changes on 16th April 1995 the code became 01851. 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 | Great Bernera |
| 1XXXXX | Great Bernera |
| 2XXXXX | Stornoway |
| 3XXXXX | Stornoway |
| 4XXXXX | Great Bernera |
| 5XXXXX | Stornoway |
| 6XXXXX | Great Bernera |
| 7XXXXX | Stornoway |
| 8XXXXX | Stornoway |
| 9XXXXX | Stornoway |