Didn't get a call from this number but received a "Texas Hold'Em" scratch and win card in the mail today, addressed to "Postal Customer". You were supposed to scratch off the cards and if it matched one of the winning poker hands, then it says to call this number M-F 10am-9pm, Sat 10am-3pm to claim your prize. What's interesting though is the you have to correctly answer a math equation printed at the bottom of the card in order to claim your prize (they probably printed a different one on each card, so by this equation they're able to verify your scratch off card).
Sounds like they just wanna get you on the phone to sell you other stuff. Who knows.