EarthCaller Sip Configuration

Earthcaller.com let you call to landline and mobile numbers in the US with an activeX in your Internet Explorer Browser.
I´ve found SIP settings to use earthcaller voip provider from any sip device.
user: earthca11erpass: n155an07server: 24.204.0.48
Example with X-Lite Softfhone:
Display Name: earthca11erUser Name: earthca11erPassword: n155an07Authorization user name:Domain: 24.204.0.48
Sometimes you´ll need to retry twice but it works and it´s free. :-)
You can call any US number for free using your ATA, Asterisk, DualPhone, softphone or any sip device.
Good voiping !