Should I call DMV and ask them if it is or not and if I have to contest within the ten days?

You need to hire a DUI specialist, and do it soon because you have only 10 days to save your license.

I assume that you are over age 21. My answer is based upon that assumption. DMV is an administrative agency. Such being the case, if they received evidence that you BAC was .08 or greater, or you refused to submit to the breath test (and you did not have a commercial drivers license), then DMV could suspend your license, regardless of whether you were convicted in a criminal court of DUI. A .063, while under the per se limit of .08, you could still be convicted of a DUI, if it can be proven beyond a reasonable doubt that your driving was affected to an appreciable degree by alcohol and/or drugs. If the court gets a conviction, even with a breath level of less than .08, then DMV will suspend your license.

If you are concerned, you should call DMV. But I think that if they return your license to you, your driving privileges have not been suspended.

If your blood alcohol concentration was below .08 you probably do not have an issue with the DMV. The main issue is what is the chemical test taken after you were arrested, if it was below the legal limit you should be

You should call them immediately and find out the deadline for contesting a suspension.

If they mailed the license back to you, then it is not suspended. Do you have a court date?