List count

I have loaded the list with exactly 15001 records, 1 bad:first line was a descriptive, but the list shows 14460 dialable lids.
Why is there a deference of 540, 3.6% ?
what variable caused some leads not to be recognized?
how can I see these records and complaint to my list provider?
Why is there a deference of 540, 3.6% ?
what variable caused some leads not to be recognized?
how can I see these records and complaint to my list provider?
