Trying to find out who owns this number.

Stated the IRS was filing a law suit against me.

http://www.irs.gov/uac/Tax-Scams-Consumer-Alerts
http://www.treasury.gov/tigta/contact_report.shtml
http://800notes.com/forum/ta-8c2f64bf2b91fa5/irs-warns-of-telephone-scam

Report the Calls to the real IRS here:
•report the incident to the Treasury Inspector General for Tax Administration at 800-366-4484.
•You can also file a complaint with the Federal Trade Commission at FTC.gov. Add "IRS Telephone Scam" to the comments in your complaint.

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Do consider getting a call blocking device or phone.. You can google them and many are around $40.00 or so.If its a cell phone, some already have call blocking, if not, there are free apps on the web that will work for some. You can google this. If you have a smart phone, there is a free app called call control. Iphones appear to have apps also. Another one is called Mr. Number.

I got a call from 412 709.5581 they said they were the irs and was suing me and gave me this number to call 360 780
6822 for info. they never mention my name or any reference that they knew who I was. do not respond to these scammers. remember if you use a phone number search website no matter how cheap they appear, they will sign you up and charge you each month, a word of advice don't get hooked by them either.

I received a call stating the irs was suing fore taxes I owe. the number was 360-780-3822