Nat'l Do Not Call List does not work. If you start your OGM with," If you are a Telemarketer or soliciting donations, hang up now as I will not respond to your call; all others leave a message after the tone,." this will help a lot. They usually hang up right after hearing the first part. It is the only thing I have found that actually works about 95% of the time.
Automated recordings they don't listen to vm so don't waste time making a recording. Girst register withe the Do Not Call registry, cell, home. Business too.
Once they call, If it is a live person only state DO NOT CALL LIST REMOVE ME FROM ALL MARKETING LIST. get a free service like voice mail and let the service capture every call number. Google the number and if it is a known telemarketer Ditch them and do not allow any future recording of automated, robo or live persons leaving worthless messages or dead air. Set their greeting to what they do when we get when we call back THIS NUMBER IS OUT OF SERVICE.
After 3 calls take a screenshot to show they ignored your registry with DNC list and file a complaint with the FCC. It's most work in the beginning but I am down from 8-10 calls on my business line to 1 or none a day. I have ditched 80 telemarketers/ fraudsters since January and that includes their multiple lines.
I have noticed they call in droves certain regions so once they start in a morning I can expect several in one day yet nothing the next. With youmail.com and free call forwarding on my service I am less and less inundated. That is until I take the block off and forget to put it back on. I usually leave it on 24/7 but internet service provider was fixing the lines so I took it off to catch their calls. Good luck
The telephone number in question is OWNED by CALLERID4U. see
http://telemarketerspam.wordpress.com/callerid4u-washington-phone-number-lis/
This is a sister company of Pacific Telecom Bleepers. Anyway, the phone message that that number is not in service may be a phoney. I would file a complaint and list CALLERID4U as the owner. This company is the SECOND largest complaint maker with the FTC and the FCC. It may take an act of Congress to put these types of companies out of business. Keep complaining and start with your senators and congresspersons.