Oh...  I called the number right back..  and the operator said that this number was not working or in another area code.   Another area code???    (720)  what could be more specific?

Just got a call from this number at 10:00am Phoenix, time.  The girl said .. "This is Gloria, and this call maybe monitored.... Is Terry there?"..  I said "no".  And she asked if this was a number he could be reached at.  I told her "yes".  And she hung up.

Received a text from this number, "Hello". I didn't reply.

Western Conservative Summit July 26 - 28.  First listings when you google the phone number are web addresses at ccu - Colorado Christian University.  HURRY!  After July 19 tickets go to $350 apiece IF they're still available!

Western Conservative Summit July 26 - 28, 2013 in Centennial/ Denver, Colorado.   You're invited by John Andrews.   HURRY!!!  Tickets go up to $350 apiece after July 19  IF tickets are still available!!!!!

Got one call from this number with no message, then another with a recorded message (can't ask a [...] machine to stop calling) about some [...] Tea Party "summit."  No "remove me from your list" number in the message.  Jerks.

woman voice ask if i believe in religious freedom would  ,she said w e would be better if we were all her religion  what a pppppp of work i said please remove me from  list..  what a creep

These people are driving me crazy.. They call twice or three times a day and the phone rings about 13 times.. how is that possible anyways??? arrggghhjhh

Answered call. Automated voice says, "This is a test call. Thank you for your participation." I hung up. Crap, I just got identified as a viable number. I won't be answering from this number any more.

Have received many calls from this number.  Have tried to call back but receive the number disconnected recording.  Very annoyed.  Cannot figure out how to stop this phone number from calling.  We are on the do not call list but that is obviously ineffective and a waste of time.

no one there

I agree with the above about if being a spoof call to verify a human voice answers so they can sell your number. Pooh! When you answer, A recorded voice says "This is a test call. Thank you for your particpation."

Recv'd 2 calls from this number and they have never left a message. I don't answer calls if I don't know the number so can't say whether anyone would answer if I picked up or not.

Left a message on the machine: "This is a test call.  Thank you for your participation."

Same problem. 5 calls today, all hang up when I answer. Is there a way to report this number, or is it spoofed by a computer program?

I have no idea why this number continues to call my Colorado Springs cell phone #, but I wish it would stop.  Not a working # when trying to call back.

I got a call from this number at 1:06 pm 6-15-2012 and no one spoke on the other end when I answered.

Repeated calls from this number and no one is there

I just got a call from 720-443-6431 and it was blocked automatically by Google Voice.  And Google Voice is free.   Google put it in the SPAM box.  :-)  
https://www.google.com/voice

I received call on 6/6/2012 at 12:45pm. caller id just lists as "CO,USA". Didn't answer let go to voicemail. No message left. I called the number back later same day, goes straight to recording saying the number is not in service.
This is obviously some kind of electronic scan scam of phone numbers to identify people's phone numbers. Who knows??? From past experience though and unfortunately personal experience with the telemarketer scam artists its probably some program using a computer to call numbers to identify or "ping" several key items about the number. Unfortunately, the information is probably going into the hands of people who are up to no good! Just to be safe I Reported the number to FTC as the caller has violated my number which is listed on the DO NOT CALL LIST. At the very least if you receive annoying calls from this number, I recommend if you're on the list to report the number to the FTC.

They just tried again.

Got a call from this number at 4pm MT; dead air, no response, no hang up. I hung up after two unanswered "hello?"s. I am on the Do Not Call List.

When I called it back the Verizon automated response I got was; "the number has been changed, disconnected or no longer in service"

It makes no sense to have a telephone if it is only to receive harrassing phone calls.

This number calls 720-4436-6431. No answer called back with a message not a good phone number. I am on a no call list. I will report.

Got two calls including one at 10:30pm on a Sunday night.  Called back and it was disconnected.

My husband and I received several calls from this number yesterday 05/20, including one at 11:50 PM!!!! When I called back, received the same message - number was no longer in service.  Is there anything that can be done??????????

Got a call at 9:30 PM from this number, a recorded message regarding Civil Unions and Legalizing Marijuana in Colorado.  Hung up, didn?t listen to the whole thing.
I agree the No Call Registry is a joke!!

The number has called me repeatedly too. One they called after midnight. I have picked up and the phone was disconnected. I tried to call back once and it said it wasn't working. I'm filing a complaint with the DoNotCall registry and I might call my phone company and have them block the number.

720-443-6431 called my home at 10:35 last night. Robo call with a computer voice stating they were conducting a survey. Seriously at 10:35 at night??  I work early and was startled awake by this stupid call. Don't call me again, DMit!

This number calls 2 to 4 time per day.  Left on message, stating"sorry unable to connect will try again"