A little-known company out of Philadelphia has been snatching up numbers like they're going out of style, and interestingly enough a good chunk of them redirect callers to phone sex hotlines. PrimeTel Communications controls nearly 25 percent of these toll-free numbers in the U. That means phone numbers you once punched in to get a hold of a helpline or make an appointment to have your oil changed might lead you to an unexpected aural threesome with what may or may not be an Alabama grandmother. These phone sex services are run by National A-1 Advertising, which happens to share an office building and convenient common ownership with PrimeTel, and it appears PrimeTel is amassing these numbers with their roommates primarily in mind. Shady, though not illegal.