(727) 938 in Tarpon Springs, FL

I got a call from Not Available 117277873500. Yes, I answered trying to get rid of unwanted callers. Lady said her name was Pam at US Federal Data Corp. at 727-938-0000 x 237 (do they all have the same extension?). Wants $30 a month (but was optional, if we didn't want to participate every month) to sign us up on a US data list so we won't have to fill out the bidding forms that the US government requires from businesses wanting to do business with the government. I told her that I had to discuss this with my partner before committing, asked her if I could ask for her when I called back (she said yes and gave me her supposed last name), but when I asked her for the address for AP purposes, she said they were in Tampa Bay, FL & had just moved, but didn't know the address, needed to ask her manager. When I asked about payment methods & I needed address for check payments or would the money be automatically be deducted from the account, and how did that work if it was optional (see above). Well, then I wasn't talking to anyone anymore. Apparently I was hung up on. My point here: she never called back, so that tells me this is NOT a telemarketer for a legitimate company, but it sounds like a scam, hence my questions digging deeper. Then I googled the number (US Federal Data Corp didn't come up as such) and found this website