knownports / Port ranges / 300–399
System PortsPorts 300–399
IANA lists at least one assignment on 74 of the 100 numbers from 300 to 399, 74.0%. The longest stretch with no assignment on any protocol runs from 334 to 343 (10 numbers). 3 numbers here are assigned on TCP alone and 0 on UDP alone. Of the 5 dated assignments, the earliest recorded date is April 7, 2010 (netcp on 395); the latest is July 15, 2025, for tacacss on 300.
Every assigned number from 300 to 399
300–399 · 74 numbers assigned
| Port | Service | Protocols | Label | Registered |
|---|---|---|---|---|
| 300 | tacacss | TCP | TLS Secure Login Host Protocol (TACACSS) | Jul 15, 2025 |
| 308 | novastorbakcup | TCPUDP | Novastor Backup | — |
| 309 | entrusttime | TCPUDP | EntrustTime | — |
| 310 | bhmds | TCPUDP | bhmds | — |
| 311 | asip-webadmin | TCPUDP | AppleShare IP WebAdmin | — |
| 312 | vslmp | TCPUDP | VSLMP | — |
| 313 | magenta-logic | TCPUDP | Magenta Logic | — |
| 314 | opalis-robot | TCPUDP | Opalis Robot | — |
| 315 | dpsi | TCPUDP | DPSI | — |
| 316 | decauth | TCPUDP | decAuth | — |
| 317 | zannet | TCPUDP | Zannet | — |
| 318 | pkix-timestamp | TCPUDP | PKIX TimeStamp | — |
| 319 | ptp-event | TCPUDP | PTP Event | Jul 27, 2010 |
| 320 | ptp-general | TCPUDP | PTP General | Jul 27, 2010 |
| 321 | pip | TCPUDP | PIP | — |
| 322 | rtsps | TCPUDP | RTSPS | — |
| 323 | rpki-rtr | TCP | Resource PKI to Router Protocol | — |
| 324 | rpki-rtr-tls | TCP | Resource PKI to Router Protocol over TLS | — |
| 333 | texar | TCPUDP | Texar Security Port | — |
| 334–343: no assignment, 10 numbers | ||||
| 344 | pdap | TCPUDP | Prospero Data Access Protocol | — |
| 345 | pawserv | TCPUDP | Perf Analysis Workbench | — |
| 346 | zserv | TCPUDP | Zebra server | — |
| 347 | fatserv | TCPUDP | Fatmen Server | — |
| 348 | csi-sgwp | TCPUDP | Cabletron Management Protocol | — |
| 349 | mftp | TCPUDP | mftp | — |
| 350 | matip-type-a | TCPUDP | MATIP Type A | — |
| 351 | bhoettymatip-type-b | TCPUDP | bhoetty MATIP Type B | — |
| 352 | bhoedap4dtag-ste-sb | TCPUDP | bhoedap4 DTAG | — |
| 353 | ndsauth | TCPUDP | NDSAUTH | — |
| 354 | bh611 | TCPUDP | bh611 | — |
| 355 | datex-asn | TCPUDP | DATEX-ASN | — |
| 356 | cloanto-net-1 | TCPUDP | Cloanto Net 1 | Apr 30, 2010 |
| 357 | bhevent | TCPUDP | bhevent | — |
| 358 | shrinkwrap | TCPUDP | Shrinkwrap | — |
| 360 | scoi2odialog | TCPUDP | scoi2odialog | — |
| 361 | semantix | TCPUDP | Semantix | — |
| 362 | srssend | TCPUDP | SRS Send | — |
| 363 | rsvp-tunnelrsvp_tunnel | TCPUDP | RSVP Tunnel RSVP Tunnel | — |
| 364 | aurora-cmgr | TCPUDP | Aurora CMGR | — |
| 365 | dtk | TCPUDP | DTK | — |
| 366 | odmr | TCPUDP | ODMR | — |
| 367 | mortgageware | TCPUDP | MortgageWare | — |
| 368 | qbikgdp | TCPUDP | QbikGDP | — |
| 369 | rpc2portmap | TCPUDP | rpc2portmap | — |
| 370 | codaauth2 | TCPUDP | codaauth2 | — |
| 371 | clearcase | TCPUDP | Clearcase | — |
| 372 | ulistproc | TCPUDP | ListProcessor | — |
| 373 | legent-1 | TCPUDP | Legent Corporation | — |
| 374 | legent-2 | TCPUDP | Legent Corporation | — |
| 375 | hassle | TCPUDP | Hassle | — |
| 376 | nip | TCPUDP | Amiga Envoy Network Inquiry Protocol | — |
| 377 | tnETOS | TCPUDP | NEC Corporation | — |
| 378 | dsETOS | TCPUDP | NEC Corporation | — |
| 379 | is99c | TCPUDP | TIA/EIA/IS-99 modem client | — |
| 380 | is99s | TCPUDP | TIA/EIA/IS-99 modem server | — |
| 381 | hp-collector | TCPUDP | hp performance data collector | — |
| 382 | hp-managed-node | TCPUDP | hp performance data managed node | — |
| 383 | hp-alarm-mgr | TCPUDP | hp performance data alarm manager | — |
| 384 | arns | TCPUDP | A Remote Network Server System | — |
| 385 | ibm-app | TCPUDP | IBM Application | — |
| 386 | asa | TCPUDP | ASA Message Router Object Def. | — |
| 387 | aurp | TCPUDP | Appletalk Update-Based Routing Pro. | — |
| 388 | unidata-ldm | TCPUDP | Unidata LDM | — |
| 389 | ldap | TCPUDP | Lightweight Directory Access Protocol | — |
| 390 | uis | TCPUDP | UIS | — |
| 391 | synotics-relay | TCPUDP | SynOptics SNMP Relay Port | — |
| 392 | synotics-broker | TCPUDP | SynOptics Port Broker Port | — |
| 393 | meta5 | TCPUDP | Meta5 | — |
| 394 | embl-ndt | TCPUDP | EMBL Nucleic Data Transfer | — |
| 395 | netcp | TCPUDP | NetScout Control Protocol | Apr 7, 2010 |
| 396 | netware-ip | TCPUDP | Novell Netware over IP | — |
| 397 | mptn | TCPUDP | Multi Protocol Trans. Net. | — |
| 398 | kryptolan | TCPUDP | Kryptolan | — |
| 399 | iso-tsap-c2 | TCPUDP | ISO Transport Class 2 Non-Control over TCP | — |