Function sequence giving me "N/A": =VLOOKUP(LEFT(C6,5),H:I,2,FALSE)

Basically, I have numbers that each start with a unique sequence. The first 5 numbers of that sequence represent a certain cell carrier.

What I want to do is have the function look up the first 5 characters of a cell and depending on the 5 characters, I want it to return a certain value.

My idea with the vlookup was to have the lookup value be the first 5 digits and then in my table, it would take only those 5 digits and return a value I have specified in the second column.

Any help on my particular function or if you have another function, I would greatly appreciate it.

Thanks,
Alan