Found a new [to me] frequency

[reedeb]

It's 453.175 PL 203.5 all they say is Dallas and a number I am unable to find who it is. Anyone know?

 

[BenScan]

In my notes, I have it as American Medical Response ambulance service.
FCC Callsign KNNP738 Details

 

[reedeb]

Thank You. They just started talking med stuff so THAT was giving me the idea it was EMS..