At about 1900Z, there were possibly seven unidentified aircraft in the vic of Marvell, AR. The mode-s codes the showed were: 000080, 000081, 000083, 800080, 800083, A0BB83 and A1BB83 Five indicated flying from 38850-39000 feet. No other indications of who they were. Glen Hosey Marvell, AR, US