Once Filed how soon we receive the Case number

My organization’s Foreign dept says my petition for H1B has been filed.

Once the H1B VISA petition is filed with USCIS, how soon does once receive the Case number?


1 week for premium

2-4 weeks for regular

Please read my post and vote for the petition using the link there: http://redbus2us.com/qa/9659/please-vote-for-this-petition