how can i verify from my Apple products ,iPhone 、iPad 、iPod , macbook ? !

i note that they are some websites recommend to visit http://www.apple110.com/iphone-check.php for verification of Apple products ,iPhone 、iPad 、iPod , thus by entering the serial number of your product in this website . and they claim that by doing that you well supported you with the information about your apple device for example ,the date of manufacture and sale, fraud prevention, anti refurbished,etc. any comment , how can i verify from my Apple products ,iPhone 、iPad 、iPod , macbook ? !