knownports / Ports 5000–5999 / Port 5900
Port5900
rfbRemote Framebuffer
IANA has registered port 5900 to rfb on TCP and UDP. The entry cites RFC 6143.
Registry entries
| Service | Protocols | Registered | Modified | RFCs | Other specs |
|---|---|---|---|---|---|
rfb | TCPUDP | Mar 2006 | — | RFC 6143 | — |
Cited RFCs
| RFC | Title | Published | Status | Later changes |
|---|---|---|---|---|
| RFC 6143 | The Remote Framebuffer Protocol | March 2011 | Informational | — |
Where it sits in the registry
Port 5900 is one of 433 numbers with an assignment in ports 5000–5999 (43.3% of the range). 292 other numbers in the range are assigned on exactly the same transports, TCP and UDP, the usual pattern for older entries. Of the 270 numbers in the range with a recorded registration date, 77 were registered before it (March 2006) and 189 after.
Status on each protocol
| Protocol | On port 5900 | Other numbers with the same status | Nearest with the same status |
|---|---|---|---|
| TCP | assigned to rfb | 5,887 | 5903 ff-ice |
| UDP | assigned to rfb | 5,500 | 5903 ff-ice |
| SCTP | no entry | 5,999 | 5883 jute |
| DCCP | no entry | 6,080 | 5903 ff-ice |
5,273 other assigned numbers in the registry have exactly this combination across all four protocols.
The nearest assigned numbers
| Port | Service | Label | Protocols | Registered | Distance |
|---|---|---|---|---|---|
| 5863 | ppsuitemsg | PlanetPress Suite Messeng | TCPUDP | Feb 2006 | 37 |
| 5868 | diameters | Diameter over TLS/TCP | TCPSCTP | — | 32 |
| 5883 | jute | Javascript Unit Test Environment | TCP | Nov 23, 2011 | 17 |
| 5903 | ff-ice | Flight & Flow Info for Collaborative Env | TCPUDPSCTP | Jun 3, 2022 | 3 |
| 5904 | ag-swim | Air-Ground SWIM | TCPUDPSCTP | Jun 3, 2022 | 4 |
| 5905 | asmgcs | Adv Surface Mvmnt and Guidance Cont Sys | TCPUDPSCTP | Jun 3, 2022 | 5 |
Listed in Ports that cite an RFC · Remote access ports: ssh, telnet, 3389 and 5900