numerous calls from this # or similar???

I get calls from 972-253-4402, 3104,4801.6040,3302,2858, and some others I did not jot down.  They NEVER leave a message but ALWAYS stay on long enough to make sure the recorder logs a call.  VERY annoying.  If I ever do answer a call I will say no just for all the annoying calls and make sure I mention to remove from ANY mailing list they have me on...

I get calls almost every other day from various numbers starting with 972-253... they NEVER leave a message but always stay on long enough to make the recorder tape.  The various numbers in the past half a month are (972) 253-4402, 3104, 4801, 6040, 3302, 2858, 3701, 3204, 8046
Is there a way to stop this harrassment???

some soliciters get credit for the numbers of
calls they make. doubt if your calls are com-
puter generated random dialers. don't feel bad
I had over 500 calls in 3 months recently. I
used a electronic device so I know they
were not computer dialed.

how dod I get them to quit calling?