It is recommended to build it yourself, the delay is 200~300ms, and the easy-to-use and stable ones are all abroad
stun.voipbuster.com (Frankfurt am Main, Hesse, Germany)
stun.voipstunt.com (Frankfurt am Main, Hesse, Germany) stun.internetcalls.com
( Frankfurt am Main, Hesse, Germany ) (Frankfurt am Main, Hesse, Germany)
stun.voip.aebc.com (Frankfurt, Hessen, Germany) (Vancouver, British Columbia, Canada)
stun.internetcalls.com (Frankfurt am Main, Hessen, Germany)
Tool download address:
Stuntman - open source STUN server
Test command line:
stunclient.exe --mode full --localport 7777 stun.voxgratia.org
Ping stun.voxgratia.org services built by third parties, the general delay is 200~300ms