Is the new Straight Talk iPhone 4 Verizon powered?

In the area I live in, the only wireless carrier we get service from is Verizon.AT&T's signal stops 50 miles away, and Sprint's stops at a town 20 miles away.So, when I type in my zip code on www.straighttalk.com, all verizon-powered phones show up, including the iPhone 4, iPhone 4S, and iPhone 5. But when I looked up "straight talk iphone 4" on Youtube to see some reviews, every video made it seem like it was an AT&T powered phone, which I Can't have.AT&T does not work here.So, I'd like to know if the iPhone 4 that Straight Talk offers is Verizon powered. I don't want a bunch of people telling me the phone is expensive, an it'd be better to just go with Verizon Wireless rather than Straight Talk. Believe me, I know plenty about phones and services. But Straight Talk does make it very confusing sometimes, for their users to know what kind of service their phones are using. I can't buy a $450 phone, and have it be an AT&T powered one. Please let me know if it's Verizon!

Straight talk roams on Verizon. It's only the prepaid network. Contract phones use different towers than straight talk network. If your zip code pops up as covered than you are.