The station UVB-76 operates on 4625 AKA the buzzer how ever there’s additional stations related to UVB-76 here’s the information I found out
PIP 5448 Day time
3756
Squeaky Wheel
5367 Day time
3363.5 Night time
3650
3815
5474
5641
4201
This was the information found on a Goggle search database
Keep in mind that it may not be active so it’ll be a trial and error