Cornerstone Fellowship Church » Partner Congregations Go back to directory. Add to Address Book. Cornerstone Fellowship Church Cornerstone Fellowship Church Contact: Paul Black Work 1301 W. Patrick Street Frederick MD 21702 work Work Phone: 301-631-0969work Work Email: Office@CornerstoneFellowship.netINTERNET Website: http://www.CornerstoneFellowship.net Categories: CMP Updated 8 years ago.