There are many ways you can build a dial plan on a snom phone.
The full range of features are documented on the snom wiki Dial Plan regex
As a quick example, here is how I can dial a local number in the area code 01484:
|^([2-9][0-9]{5})$|sip:014841@d
For many people, this may well be the only dial plan rule that they wish to use.
Get reading the documentation and see what you can do!