An 0844 number is a fixed rate non geographic number.
This means that the caller always pays the fixed call price of max 5p per minute when calling this number from anywhere in the UK at any time..
Calls to an 0844 number from a standard BT landline line will cost the caller (including VAT):
4.89p (Daytime)
4.89p (Evening)
4.89p (Weekend)
Note: Some countries do not allow calling from abroad to 0844 numbers.
Other options are
0845 Numbers
0870 Numbers