i have a question: can anybody help me:
i have a matrix that goes like this

country_code + country + rate1 + rate2 + rate3
01157 Colombia 0.23 0.24 0.19
01158 Costa Rica 0.27 0.26 0.11
. .
. .
. .
n n countries


the client has a preset rete of "rate3", he makes a call tothis number 0115758340625?
the question is what do i need to do to compare the first six digits of the call to determine the country code and then the country and the rate...can anybody help me do that...