Typically, the license is valid until March 31 for October exams. They will send you a letter to pay the fee and once that's done, they send the certificate.
You will get a letter with the certificate and the number (at least that's what happened when I got my PE 3 years back). If all you want is the license number, the online database will probably be updated in the next few days and you can get the number there.
Congrats to everyone that passed! Those who didn't - it is a very difficult exam. Best wishes for next time!
I am waiting on traffic too... Nothing yet. The last 4 years, traffic results have come either the same day as Siesmic or the next day. Keeping my fingers crossed.