[Serusers] checking called number

[Kamran Ahmad]

hello

I want to check wheather called number is started from
"R" then route his calls to one location othe wise do
another 

i have a condition
if(uri=~"^sip:R*@ipaddress") {
          do somthing
          route(1);
}
else {
          do somthing
          route(2);
}

when my number starts from R it never goes to first
condition it always goes to route2 what is best way to
do so



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