Just got a call from this one. I live in Colorado, so was curious if it was valid. No message left, so quite sure it is a scam number. Hate that [***]. I received two others yesterday from similar 303 numbers that I did not recognize.

To block calls just go to your "recents" list in your phone and hit the "i" on the right next to the number.  Then scroll down to "Block this Caller".

This is the iPhone method running ios7 or later.

I also received and answered this phone call cuz it's the same area code I reside in. I pressed 1 after the prompts and asked to be taken off the no call list and the lady said "um, no."  And they she hung up on me! What the hell? I keep getting these types of calls? Why isn't anybody doing anything to stop this scamming [***]!?! So sick of it!

Marketing spam call. Recorded message from "Card Services" offering to lower interest rate. Telemarketing b.s., "press 1 to speak to a live operator". Hang up, this is garbage.

Just got a call from this number, no message.  My phone said it came from Dillon, Colorado.