If you have an employer-sponsored plan (401k, 403b, etc), GuideStone does not assign an account number to you. 

For Individual Retirement Accounts (IRAs) or Investment Accounts, your account number can be found online in your MyGuideStone account under your displayed account balance, or on your quarterly account statements.

If another institution is requesting this information for verification purposes (such as mortgage applications, Social Security benefit applications, etc.) we recommend providing "N/A" or your Social Security Number without dashes. If you wish to roll over your employer-sponsored retirement account (403b, 401k, etc.) to another institution, request an outbound rollover online. Please note that we cannot accept another institution's paperwork for outbound rollovers on employer-sponsored plans (401k, 403b, etc.).

Is a rollover the best option for you? Here are some Key Things To Consider Before Rolling Over.