call block all you want guys these are all the numbers i have collected so far. i use callfilter from the android market i love it. they still have to call but they are blocked and i dont have to even hear a voicemail from them :)
2054234020
2055888181
2159448989
2396428598
4045925171
4049212521
4049684848
4053295714
4073474014
4122821420
4168009148
4405800720
4433131380
4844892840
5103551780
5125193650
5182073600
6022642270
6022865100
6057822890
6206621492
6206628870
6262092241
6616734507
6782651568
7024107069
7144083640
7146803192
7312158010
7319847690
7573216279
7573216280
7573216282
7578640020
7579613544
7579613546
7579613547
7579613548
7862068643
8003838013
8004277142
8007721413
8476789710
8479942540
8479942544
8599180780
8666913568
8668870973
8669407640
8778768723
8882185212
8885436072
9184420320
9546229827
just called at 7:50pm PDT, a 1 second voicemail registered on my phone, though there was no sound on the message. I did not call back. I'm an AT&T customer.
The message states that you have 'won' something and that you should press '1' or '2' to activate the feature in your phone. Again, too much static to make something out if it. But don't pay attention to it, call your provider and tell them that this number has called. They will fix them immediately.