Value,Name,Reference
0,Raw,[RFC6143]
1,CopyRect,[RFC6143]
2,RRE,[RFC6143]
5,Hextile,[RFC6143]
9-10,Possibly used in UltraVNC,historic assignment
16,ZRLE,[RFC6143]
-239,Cursor pseudo-encoding,[RFC6143]
-223,DesktopSize pseudo-encoding,[RFC6143]
4,CoRRE,historic assignment
6,zlib,historic assignment
7,tight,historic assignment
8,zlibhex,historic assignment
15,TRLE,[RFC6143]
17,Hitachi ZYWRLE,historic assignment
20,H.264,[Tristan_Richardson]
21,JPEG,historic assignment [Tristan_Richardson]
22,JRLE,historic assignment [Tristan_Richardson]
23,VA H.264,[Tristan_Richardson]
24,ZRLE2,[Tristan_Richardson]
50,Open H.264 Encoding,[https://github.com/rfbproto/rfbproto/blob/master/rfbproto.rst][Maxim_Devaev]
1000-1002,Apple Inc.,[Michael_Stein]
1011,Apple Inc.,[Michael_Stein]
1024 to 1099,RealVNC,historic assignment [Tristan_Richardson]
1100-1109,Apple Inc.,[Michael_Stein]
-1 to -222,tight options,historic assignment
-224 to -238,tight options,historic assignment
-240 to -256,tight options,historic assignment
-257 to -272,Anthony Liguori,historic assignment
-273 to -304,VMWare,historic assignment
-305,gii,historic assignment
-306,popa,historic assignment
-307,Peter Astrand DesktopName,historic assignment
-308,Pierre Ossman ExtendedDesktopSize,historic assignment
-309,Colin Dean xvp,historic assignment
-310,OLIVE Call Control,historic assignment
-311,ClientRedirect,[Brian_Hinz]
-312,Fence,TigerVNC
-313,ContinuousUpdates,TigerVNC
-314,CursorWithAlpha,[Tristan_Richardson]
-315,ColorMap,[Tristan_Richardson]
-316,ExtendedMouseButtons,[https://github.com/rfbproto/rfbproto/blob/master/rfbproto.rst][Adam_Halim]
-317,Tight + No Zlib,[Darrell_Commander]
-412 to -512,TurboVNC fine-grained quality level,historic assignment
-523 to -528,Car Connectivity,"[J?rg_Brakensiek]
        [Terminal Mode v1.0]"
-763 to -768,TurboVNC subsampling level,historic assignment
0x48323634,VA H.264,[David_Verbeiren]
0x52706C41,Replit Audio Pseudo-encoding,[Luis_H¨Śctor_Ch¨˘vez]
0x574d5600 to 0x574d56ff,VMWare,historic assignment
0xc0a1e5ce to 0xc0a1e5cf,Possibly used in UltraVNC,historic assignment
0xfffe0000 to 0xfffe00ff,Used in LibVNCServer,LibVNCServer
0xffff0000 to 0xffff8003,Possibly used in UltraVNC,historic assignment