In 1963, 36 obsolescent B-47Es were modified as electronics communications aircraft under the designation EB-47L. The EB-47Ls were to serve as airborne relay stations between other aircraft (such as the USAF "Looking Glass" EC-135 command post or the Navy's EC-130Q) or between aircraft and ground stations during and after a nuclear attack.
Their serial numbers were: 52-031, 033, 034, 035, 038, 041, 059, 061, 066, 067, 069, 071, 078, 081, 082, 086, 099, 105, 154, 204, 211, 212, 214, 217, 220, 224, 291, 292, 298, 303, 305, 308, 309, 510, 513, and 53-2329
The EB-47Ls soon became obsolete and were phased out during 1965/66