Only 123.925 is left in TXK. About 5 south of Sherman, Texas, 124.875, 134.475 and 126.575 ZFW controllers are heard easily. New ultra- high altitude added to MLC also, 128.125 for ZFW. Heard the controller. It is my understanding that the old TXK high altitude freqs will eventually be put back in there, 134.475, 126.575, after some construction is done. that is, higher towers or probably moving the RCAG to the airport (like Paris, SGF, HRO, FSM, ORK, etc.). AT TXK, one would not be able to pick-up an IFR clearance after hours in the night on 123.925ZFW. Too far away. AT FSM, you can with ZME as it is on the field.
Little Rock Tracon has "RTRs" at Conway, ORK and Searcy for IFR pickup.