I don't believe there aren't any reports abbout this number. The IRS scammers have gone from a number on caller ID that says Washington DC to this one that says San Antonia, TX. I have already caller the cop shop with the other number so now it's time to call and report this one also.

Official IRS Government site detailing this scam and providing links to report it:
http://www.irs.gov/uac/Newsroom/IRS-Warns-of-Pervasive-Telephone-Scam

If you feel you SSN has been compromised, in addition to putting a fraud alert at the 3 credit bureaus, you may want to notify the IRS.  Here is the link, fill out the proper form (probably 14039):
http://www.irs.gov/Individuals/How-Do-You-Rep ... aud-Activity%3F

from this number, voicemail message says it is the IRS and they are going to file an immediate lawsuit against  me unless I call a number (starting with Area Code 509)....

My elderly mother received a call from 210-209-9133 telling her that the IRS has filed a law suit against her. Fortunately (or unfortunately) she watches a lot of TV and knows to be ware of phishing calls, so she did not believe them nor divulge any information

Said that the IRS was going to file a lawsuit against me for back taxes. This is a SCAM