- EtherNet/IP makes use of UDP port number 2222 for implicit messaging.
IANA Data
Name: EtherNet/IP-1
Description: EtherNet/IP I/O
Note: New contact added for port 2222 on 2008-02-01 This entry is an alias to "EtherNet-IP-1". This entry is now historic, not usable for use with many common service discovery mechanisms.