The four numbers that make up Liverpool's dialling code are used by many of us every day - and date back quite some time.
1958 saw the introduction of subscriber trunk dialling codes, allowing people to make non local calls without the need of operator assistance. Before then, people had to ask the operator for assistance so they could be put through to another town or city.
The development made by dialling codes was publicised by the Queen, who phoned Edinburgh from Bristol - at the time this was longest distance call which could be made in the UK. This was during the era when the old General Post Office controlled and ran telephone services in the UK.
