| 4000 | tcp | terabase | Terabase | IANA |
| 4000 | udp | terabase | Terabase | IANA |
| 4000 | tcp,udp | | Diablo II game | wikipedia |
| 4000 | tcp,udp | TERABASE | [TERABASE] RFC1700ではTERABASEが規定されている通信ポートです。また、ICQのバージョンの中には、ICQサーバにログオンする際にこのポートを利用こともあります。不正アクセスのターゲットとして狙われ易いポートの一つです。 | OCNセキュリティ対策 |
| 4000, 6112-6119 | tcp | | Blizzard Battlenet | PortForward |
| 4000, 6112-6119 | udp | | Blizzard Battlenet | PortForward |
| 1119-1120, 3724, 4000, 6112-6114 | tcp | | Blizzard Downloader | PortForward |
| 1119-1120, 3724, 4000, 6112-6114 | udp | | Blizzard Downloader | PortForward |
| 1234-1237, 4000, 5400, 5009 | udp | | Command & Conquer: Red Alert | PortForward |
| 1234-1237, 4000, 5400 | udp | | Command & Conquer: Tiberian Sun | PortForward |
| 4000, 6112 | tcp | | Diablo II | PortForward |
| 1140-1234, 4000 | tcp | | Dune 2000 | PortForward |
| 1140-1234, 4000 | udp | | Dune 2000 | PortForward |
| 4000 | tcp | | Eclipse | PortForward |
| 4000 | udp | | Eclipse | PortForward |
| 4000-4001 | udp | | Multiwinia | PortForward |
| 80, 44, 4000-4200, 6112 | tcp | | Pro Evolution Soccer 2011 | PortForward |
| 4000-4200, 8800-8899, 14020 | tcp | | Pro Evolution Soccer 2015 | PortForward |
| 4000-4200, 8800-8899, 14020 | tcp | | Pro Evolution Soccer 2016 | PortForward |
| 4000-4200, 8800-8899, 14020 | tcp | | Pro Evolution Soccer 2017 | PortForward |
| 4000-4200, 8800-8899, 14020 | tcp | | Pro Evolution Soccer 2018 | PortForward |
| 3999-4000 | tcp | | Remote Anything | PortForward |
| 1119-1120, 3724, 4000, 6112-6114, 6881-6999 | tcp | | StarCraft II Downloader | PortForward |
| 1119-1120, 3724, 4000, 6112-6114, 6881-6999 | udp | | StarCraft II Downloader | PortForward |
| 4000-4004 | tcp | | Storj Share | PortForward |
| 1140-1234, 4000 | tcp | | Tiberian Sun | PortForward |
| 1140-1234, 4000 | udp | | Tiberian Sun | PortForward |
| 80, 1433, 4000, 11111 | tcp | | Video Insight Server | PortForward |
| 80, 4000, 554, 3800 | tcp | | Videon Digital Linux DVR | PortForward |
| 99, 4000 | tcp | | Wanscam AJ-C2WA-C118 | PortForward |
| 4000 | tcp | | Warp Pipe | PortForward |
| 4000 | udp | | Warp Pipe | PortForward |
| 80, 554, 4000 | tcp | | Watchnet Embedded DVRs | PortForward |
| 1140, 1234, 4000 | tcp | | Westwood Online | PortForward |
| 4000-4200, 8800-8899, 14020 | tcp | | Winning Eleven 2016 | PortForward |
| 4000-4200, 8800-8899, 14020 | tcp | | Winning Eleven 2017 | PortForward |
| 4000-4200, 8800-8899, 14020 | tcp | | Winning Eleven 2018 | PortForward |
| 4000-5000 | tcp | | WIRES-II | PortForward |
| 4000-5000 | udp | | WIRES-II | PortForward |
| 1119-1120, 3724, 4000, 6112-6114 | tcp | | World of WarCraft Downloader | PortForward |
| 1119-1120, 3724, 4000, 6112-6114 | udp | | World of WarCraft Downloader | PortForward |
| 1119-1120, 3724, 4000, 6112-6114 | tcp | | World of WarCraft Launcher | PortForward |
| 1119-1120, 3724, 4000, 6112-6114 | udp | | World of WarCraft Launcher | PortForward |
| 1234-1237, 4000, 5009, 5400 | udp | | Xwis | PortForward |
| 4000 | tcp | | zbattle.net | PortForward |