01389 492 Dialing Code
Dumbarton
Dialing Code 01389 492 is part of Area Code 01389, which covers Dumbarton and the surrounding area.
The majority of numbers in the 01389 Area Code belong to normal landlines in Dumbarton, but it is possible that these numbers are being used elsewhere as virtual numbers.
There are multiple telephone companies operating in the 01389 Area Code and they are allocated blocks of numbers, which can be identified by the digits following the Area Code. In this case, the digits 492 after the area code indicate that the range of numbers was originally allocated to Invosys Limited on 9 July 2012, although due to number portability, individual numbers within this range may now be allocated to other operators.
01389 area code information
| Area Code: | 01389 |
|---|---|
| Location: | Dumbarton |
| Dialing Code: | 01389 492 |
| Provider: | Invosys Limited |
| Date range allocated: | 9 July 2012 |
| Call Costs: | Normal landline rate |
| Area code required for local calls: | No |
| Local number length: | 6 |
| Number format: | 01389 492### |
| International number format: | +44 1389 492### |
| Last code change: | April 1995 from 0389. |
This page was last updated on 9 August 2023.