cmtp-mgt 8501/tcp # CYTEL Message Transfer Management
cmtp-av 8501/udp # CYTEL Message Transfer Audio and Video [Frank_Jakel] [Frank_Jakel] 2011-04-29
ftnmtp 8502/tcp # FTN Message Transfer Protocol [Yuri_Myakotin] [Yuri_Myakotin] 2014-01-07
-lsp-self-ping 8503/udp # MPLS LSP Self-Ping [IESG] [IETF_Chair] 2015-06-11 2015-11-03 [RFC-ietf-mpls-self-ping-06]
+lsp-self-ping 8503/udp # MPLS LSP Self-Ping [IESG] [IETF_Chair] 2015-06-11 2016-02-01 [RFC7746]
rtsp-alt 8554/tcp # RTSP Alternate (see port 554) [Stephen_Casner_2] [Stephen_Casner_2]
rtsp-alt 8554/udp # RTSP Alternate (see port 554) [Stephen_Casner_2] [Stephen_Casner_2]
d-fence 8555/tcp # SYMAX D-FENCE [Thomas_Geisel] [Thomas_Geisel] 2003-01