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