It appears to be a data channel; do they use MDC's? Here's what I located on the license:
WPNX463
Emission Designators:
460.2375 11K0F1D
465.2375 11K0F1D
Looking at the last 3 symbols:
1. First Symbol - type of modulation of the main carrier.
2. Second Symbol - nature of signal(s) modulating the main carrier
3. Third Symbol - type of information to be transmitted.
Emission in which the main carrier is angle-modulated:
F= Frequency modulation
Second Symbol - nature of signal(s) modulating the main carrier:
2= A single channel containing quantized or digital information without the use of a modulating sub-carrier, excluding time-division multiplex
Third symbol - type of information to be transmitted:
D= Data transmission, telemetry, telecommand