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303 is a numbering plan code assigned to Colorado. Phone area codes in North America were first used in 1947.

Most of the telephone numbers in the North American numbering plan are assigned to USA and Canada with a small portion assigned to some caribbean nations

Major cities located in phone number code 303 are as follows: Arvada, Aurora, Boulder, Brighton, Broomfield, Castle Rock, Castlewood, Columbine, Commerce City, Denver, Englewood, Highlands Ranch, Ken Caryl, Lafayette, Lakewood, Littleton, Longmont, Loveland, Northglenn, Parker, Southglenn, Thornton, Westminster, Wheat Ridge

Area 303 / submissions

Report for 1-3034590979 - 2020-01-26
Caller is "Med Alert". It is a sales call. They keep calling for the "Paula". I have told them numerous times now that my number is on the do not call list, to stop calling my number and to take my name off their call list. They still call. Today's caller, "Steve", called again after the 2nd call to a person whose number is already on the do not call list...he was yelling and threatening because the person would not listen to him. I asked politely to speak to his manager and was hung up on as well. It's sad that the DO NOT CALL LIST does not

Report for 1-3034858222 - 2020-01-24
Received call from number, no voice but message was left by "Sandra Johnson". No info on this number. Blocked.

Report for 1-3033187181 - 2020-01-22
Call from this number on 10/18/14. CID: "Boca Raton FL" Did not leave a message.

Report for 1-3039965372 - 2020-01-20
No Message.

Report for 1-3036809150 - 2020-01-13
This number calls every day. Has called before even though my number is a government number. Never leaves a message- I've never answered..

Report for 1-3036254105 - 2020-01-13
I have received two calls now. I am going to look into it as it is now my birthday not a week later. It is a number from a debt collector.

Report for 1-3039965372 - 2020-01-13
Just called them but no response from the line so I said well give me your company name and I will give your company a call to verify this with my credit card company and they stated a couple different things about what the charges were. Would not give me what my charge was on the last transaction I had and said I would have to get the company name. They wanted to make me feel something bad was going to happen if I didn't pay this. Said it was for credit cards that I have paid for years and that company had no record of. Did not feel comfortable.

Report for 1-3036809150 - 2020-01-12
Just another scammer using a computer program to show fake caller ID's. No message, just like all of them.

Report for 1-3034858222 - 2020-01-05
Called my cell phone today at 3:20 p.m., no message. Thank you for the info.

Report for 1-3036809150 - 2019-12-30
Caller ID shows "unknown name" (no, they know that I won't answer, and they don't leave a message... the first time, I answered...they had their call forwarded to my work email address... when I spoke to them, they told me there was a problem with my windows program (which isn't even on my desktop), and I would need to enter a PIN number that they would transfer me... of course they don't ask for the PIN number, the only thing I gave them was the telephone number. I told them to take me off of their calling list, and to not call back or I would report them to the authorities. Of course by the way... after I hung up, they called back again (but had my number blocked) - I reported it.

Report for 1-3034590979 - 2019-12-18
I keep getting a call from this number on my landline, and I'm on the do not call registry.

Report for 1-3033884461 - 2019-12-17

Report for 1-3032561030 - 2019-12-04
Called in mid-afternoon. No message left. Gonna assume it was just another spamcall.

Report for 1-3037312577 - 2019-12-01
A recording saying they had my name, social security and employer and to press 1 to speak to an investigator or press 2 to be removed from their call list. The voice sounded "robo" And it said they have sent documentation and I was being reported. I pressed to speak to a person. I was told the same thing that I am being reported and I would be in legal trouble if I do not respond. I asked for their company name. They said American Law Associates and wanted to confirm my name and social security number. I refused and they did not want me to identify my address nor my social security number. I asked for their physical address and name or website for them to comply with the law. They refused again. I asked for a name and was

Report for 1-3037475141 - 2019-11-30
Just another of the hundreds of robo-called numbers used in a small town in western PA. The name of the town is Litchfield but I think they left a message.

Report for 1-3036297171 - 2019-11-27
Didn't answer, but there was background noise.

Report for 1-3032199012 - 2019-11-27
They called yesterday and I don't answer unknown callerID's, just blocked. This morning again called. They left no message. I will block the number.

Report for 1-3032778989 - 2019-11-23

Report for 1-3039967293 - 2019-11-23
I have had several missed calls over the past few days from this number asking for someone other than myself. I've hung up before, but as they call again I'm going to mess with them. I don't know who they are and I definitely don't know why they continue to call.

Report for 1-3035656600 - 2019-11-19
This phone number has been calling repeatedly over several days and I have never pick up. They are now calling my elderly father and trying to get him to give them money.

Report for 1-3037999044 - 2019-11-03
I just got a call from this number and also they left a voice mail but it did not start at the beginning because I did not answer it.

Report for 1-3034777240 - 2019-11-03
No message.

Report for 1-3034777240 - 2019-10-17
I just got a call from a "Kevin Mason" and he left a message to call 916-902-7051, regarding a legal matter, and "if I know the whereabouts if them, to give them a call"I called the number back to see if it was for a payday loan I took out (I have never had one), and the person who answered was so rude, stating they wanted my address on which I would not give them that information, stating that I was being recorded, and would not let me speak to a supervisor. So I hung up on them and called back, which put me through to someone else and the same kind of person that would not let me I told them to take me to court, and they said "you have heard it all, see you in court".

Report for 1-3033178444 - 2019-10-17
Called today, no message.

Report for 1-3033896010 - 2019-10-08
I got a voicemail from this number saying the following:"File a claim against us at the tax crime investigation." I've had this before!

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