IRS-TAXID-NUMBER.COM is a total scam, here is their information if you are board and want to contact the owner of the website:
Registrant Contact
Name: WHOISGUARD PROTECTED
Organization: WHOISGUARD, INC.
Mailing Address: P. O. BOX 0823-*******, PANAMA PANAMA ******* PA
Phone: *******503
Ext:
Fax: +51.*******
Fax Ext:
Email:*******@WHOISGUARD.COM