Network - (Internet) Socket (Network identifier) in the context of Network - User Datagram (UDP)
A UDP socket cannot be in an connection established state, since UDP is connectionless but the socket has a state.
Therefore, a listing utility will not show the state of a UDP socket. A UDP server does not create new child processes for every concurrently served client, but the same process handles incoming data packets from all remote clients sequentially through the same socket.
UDP socket with TCPview
See UDP - State
UDP sockets are not identified by the remote address, but only by the local address, although each message has an associated remote address.