Look at the filtering field I used here:
Wireshark is a very powerful tool which knows about the OSC protocol and can sniff it transparently, but there are other useful OSC monitoring application available. See here:
Gig Performer has OSC support and that’s very nice!
Starting to work with OSC often necessitates to monitor OSC messages like Gig Performer can do it for MIDI messages using its builtin MIDI monitor. Reading the GP forum, different software for OSC monitoring can be identified, among them:
Protokol (for Windows, Mac, Linux, iOS & Android): Protokol | hexler.net (by the TouchOSC team)
OSC Data Monitor (for Windows & Mac): OSC Data Monitor ⋆ Kasper Kamperman (see also the nice OSC video introdu…