What is a CPN number? A CPN number is also known as a Credit Profile Number, a Credit Privacy Number, an SCN or a Secondary credit number. Don’t let all these abbreviations and acrimonious confuse you they are all the same thing. A 9 digit number you can use in lieu of your social security number for credit reporting purposes only. What is the benefit ... 1/25/2019 ~ Marietta, Georgia ~ 233.8 mi.