I also have received calls from 469-251-2025. My caller ID says it is Home Security (Dallas, TX). I do not answer any out of area calls nor numbers I do not recognize, nor any toll-free numbers. If I am home, I pick up the phone, do not say anything and hit the # key very fast repetitively for 60 seconds. I have done this several months ago each time a number called, and the calls stopped. As of two days ago, I am getting calls again and will do the same thing.
Has called me more times than I can count. Never leaves message except for a dial tone, and I sure as heck don't answer.
Most of the time I leave my ringer turned off anyway, and the number of ringe is set to two before the answering machine picks up, even when I do have the ringer on - You all should try that. It's WONDERFUL!
I figure if it's import enough for me to talk to them, they can leave a message. I check my message once or twice a day. If anyone needs anything before then, call 911.