There are three credit reporting agencies. Unfortunately, they do not have to show your credit scoring to be the same. Equifax, Experian and TransUnion. One may provide your rating at 700 while one of the others show 670.
When (if) you apply for credit, the company may contact only one of the agencies and determing your score. Depending on which one, you could be denied credit.
This isn't fair but that's the way it is.
BTW, applying for too many charge cards can affect your credit rating. When car shopping, all your visits are usually submitted.
You can obtain a free copy of each once a year.