| 12000 | TCP, UDP | entextxid | IBM Enterprise Extender SNA XID Exchange |
| 12001 | TCP, UDP | entextnetwk | IBM Enterprise Extender SNA COS Network Priority |
| 12002 | TCP, UDP | entexthigh | IBM Enterprise Extender SNA COS High Priority |
| 12003 | TCP, UDP | entextmed | IBM Enterprise Extender SNA COS Medium Priority |
| 12004 | TCP, UDP | entextlow | IBM Enterprise Extender SNA COS Low Priority |
| 12005 | TCP, UDP | dbisamserver1 | DBISAM Database Server - Regular |
| 12006 | TCP, UDP | dbisamserver2 | DBISAM Database Server - Admin |
| 12007 | TCP, UDP | accuracer | Accuracer Database System Server |
| 12008 | TCP, UDP | accuracer-dbms | Accuracer Database System Admin |
| 12009 | TCP, UDP | ghvpn | Reserved |
| 12010 | TCP, UDP | edbsrvr | ElevateDB Server |
| 12012 | TCP, UDP | vipera | Vipera Messaging Service |
| 12013 | TCP, UDP | vipera-ssl | Vipera Messaging Service over SSL Communication |
| 12109 | TCP, UDP | rets-ssl | RETS over SSL |
| 12121 | TCP, UDP | nupaper-ss | NuPaper Session Service |
| 12168 | TCP, UDP | cawas | CA Web Access Service |
| 12172 | TCP, UDP | hivep | HiveP |
| 12300 | TCP, UDP | linogridengine | LinoGrid Engine |
| 12302 | TCP, UDP | rads | Remote Administration Daemon (RAD) is a system service that offers secure, remote, programmatic access to Solaris system configuration and run-time state |
| 12321 | TCP, UDP | warehouse-sss | Warehouse Monitoring Syst SSS |
| 12322 | TCP, UDP | warehouse | Warehouse Monitoring Syst |
| 12345 | TCP, UDP | italk | Italk Chat System |
| 12546 | TCP, UDP | carb-repl-ctrl | Carbonite Server Replication Control |
| 12753 | TCP, UDP | tsaf | tsaf port |
| 12865 | TCP, UDP | netperf | control port for the netperf benchmark |