4434516999

Just got a call to my cell phone.  Rang once and hung up.  My area code is 425.

Oct 7, 2011 about 8 PM PST, I got a call on my cell, and did not ans it. They did not leave a message either. Don't want to call them back so they know they reached a working number. Scam artists most likely. Good for this website, keep it up.

For anyone wondering what hey cosmo means: http://www.heycosmo.com/
They offer prank call services and such. You can block heycosmo calls to your phone at http://www.heycosmo.com/common/dnc.php

Got a call from this number, answered, they hung up immediately. I called them back and it was something called "Hey Cosmo."

Same thing 10/11/11 - I am in the 619 area code.  I complained to the FCC and you can do the same.  I get these calls a couple of times a day both home and cell.  THEY NEED TO BE STOPPED!

10/12/11 3:32pm just got a call from this number a few minutes ago but didn't answer. how annoying.

Just called my cell, but didn't say anything

Received 2 unsolicited calls from this number today. They call and hang up.
These odd calls are not on my landline they are calling my cell.

Exactly same here. The only thing is that I don't know how to block a phone number.

My cell just rang with the same m.o.  I'm in the 530 area code.

Hate Cosmo?! LMFAO okay guys this is lame and I'd be glad to ensure you that whatever this "marketing"/ "prank" thing is, is a strict dub! On that note when you see an 443 451 6999 DO NOT ANSWER!!!!!!!!!!!!!!!!!

Was on my computer accessing a horseracing stat site,got a banner warning me of a "clickjacking attempt",backed out of the site and 2 minutes later this # called,no rseponse,only silence.I hung up. Connection with "clickjacking attempt"?I checked and it seems that this is a new hacking attempt that is buried in some browsers.

This call came in and there was no voice mail left.  Don't know who they are.

Left my cell at my room, came back I noticed I had a missed call and it was from this number 443-451-6999. I googled it and I was surprised to see a lot of compalints about this numer. I'm from area code 510.

Just got call on cell from 510.  Didn't pick up the phone and no message.

Got a call at 10pm from this number. Called it back the next morning and it was for a free horoscope reading, something like Hey Cosmo.

I'm in the 509 area code and got a call from this number last night at 8:06 pm. This is so weird!

This was a missed call on my cell phone in the 510 area code.  Call came in at 4:55 PM (PST) on 10/13.  I did not return call because the number is not a familiar one to me.  Instead I google searched it and this is the result.

Just received a call from 443-451-6999, no message. Don't know anyone from Maryland. Did not call back.

Received a call on my cell @ 2:16pm ET. No voice mail was left.