| Port | | Description |
| 0 | | Reserved |
| 1 | | tcpmux |
| 3 | | Compression Process |
| 4 | | |
| 5 | | Remote Job Entry (rje) |
| 7 | | echo |
| 9 | | discard |
| 11 | | systat |
| 13 | | daytime |
| 15 | | netstat |
| 17 | | qotd |
| 18 | | send/rwp |
| 19 | | chargen |
| 20 | | ftp-data |
| 21 | | ftp |
| 22 | | ssh, pcAnywhere |
| 23 | | Telnet |
| 24 | | any private mail system |
| 25 | | SMTP |
| 27 | | ETRN |
| 29 | | msg-icp |
| 31 | | msg-auth |
| 33 | | dsp |
| 35 | | any private printer server |
| 37 | | time |
| 38 | | RAP |
| 39 | | Resource Location Protocol (rlp) |
| 40 | | |
| 41 | | Graphics |
| 42 | | nameserv, WINS |
| 43 | | whois, nickname |
| 44 | | MPM FLAGS Protocol |
| 45 | | Message Processing Module [recv] |
| 46 | | MPM [default send] |
| 47 | | NI FTP |
| 48 | | Digital Audit Daemon |
| 49 | | TACACS, Login Host Protocol |
| 50 | | RMCP, re-mail-ck |
| 51 | | UDP. IMP Logical Address Maintenance |
| 52 | | XNS Time Protocol |
| 53 | | DNS |
| 54 | | XNS Clearinghouse |
| 55 | | ISI Graphics Language |
| 56 | | XNS Authentication |
| 57 | | MTP |
| 58 | | XNS Mail |
| 59 | | NFILE |
| 60 | | |
| 61 | | NI MAIL |
| 62 | | ACA Services |
| 63 | | whois++ |
| 64 | | Communications Integrator (CI) |
| 65 | | TACACS-Database Service |
| 66 | | sql*net |
| 67 | | bootps |
| 68 | | bootpd/dhcp |
| 69 | | Trivial File Transfer Protocol (tftp) |
| 70 | | Gopher |
| 71 | | Remote Job Service |
| 72 | | Remote Job Service |
| 73 | | Remote Job Service |
| 74 | | Remote Job Service |
| 75 | | any private dial out service |
| 76 | | Distributed External Object Store |
| 77 | | any private RJE service |
| 78 | | vettcp |
| 79 | | finger |
| 80 | | www-http |
| 81 | | HOSTS2 Name Server |
| 82 | | XFER Utility |
| 83 | | MIT ML Device |
| 84 | | Common Trace Facility |
| 85 | | MIT ML Device |
| 86 | | Micro Focus Cobol |
| 87 | | any private terminal link |
| 88 | | Kerberos, WWW |
| 89 | | SU/MIT Telnet Gateway |
| 90 | | DNSIX Securit Attribute Token Map |
| 91 | | MIT Dover Spooler |
| 92 | | Network Printing Protocol |
| 93 | | Device Control Protocol |
| 94 | | Tivoli Object Dispatcher |
| 95 | | SUPDUP |
| 96 | | DIXIE Protocol Specification |
| 97 | | Swift Remote Virtural File Protocol |
| 98 | | TAC News / linuxconf |
| 99 | | Metagram Relay |
| 100 | | [unauthorized use] |
| 101 | | NIC Host Name Server (HOSTNAME) |
| 102 | | ISO-TSAP Class 0 / X.400, ITOT |
| 103 | | Genesis Point-to-Point Trans Net |
| 104 | | ACR-NEMA Digital Imag. & Comm. 300 |
| 105 | | Mailbox Name Nameserver / cso |
| 106 | | 3COM-TSMUX / Password Server (poppassd) |
| 107 | | Remote Telnet Service |
| 108 | | SNA Gateway Access Server |
| 109 | | POP2 |
| 110 | | POP3 |
| 111 | | SUN Remote Procedure Call / Sun RPC Portmapper |
| 112 | | McIDAS Data Transmission Protocol |
| 113 | | iAuthentication Service (dentd/auth) |
| 114 | | Audio News Multicast |
| 115 | | SFTP |
| 116 | | ANSA REX Notify |
| 117 | | UUCP |
| 118 | | SQL Services |
| 119 | | NNTP |
| 120 | | CFDPTKT (CFDP) |
| 121 | | Encore Expedited Remote Pro.Call |
| 122 | | SMAKYNET |
| 123 | | NTP |
| 124 | | ANSA REX Trader / SecureID |
| 125 | | Locus PC-Interface Net Map Ser |
| 126 | | Unisys Unitary Login |
| 127 | | Locus PC-Interface Conn Server |
| 128 | | GSS X License Verification |
| 129 | | Password Generator Protocol (PWDGEN) |
| 130 | | cisco FNATIVE |
| 131 | | cisco FNATIVE |
| 132 | | cisco FNATIVE |
| 133 | | Statistics Service (statsrv) |
| 134 | | INGRES-NET Service |
| 135 | | lLocation Service (oc-srv)/epmap |
| 136 | | PROFILE Naming System |
| 137 | | NETBIOS Name Service (netbios-ns) |
| 138 | | NETBIOS Datagram Service (netbios-dgm) |
| 139 | | NetBIOS |
| 140 | | EMFIS Data Service |
| 141 | | EMFIS Control Service |
| 142 | | Britton-Lee IDM |
| 143 | | IMAP |
| 144 | | NewS |
| 145 | | UAAC Protocol |
| 146 | | ISO-IP0 |
| 147 | | ISO-IP |
| 148 | | CRONUS-SUPPORT |
| 149 | | AED 512 Emulation Service |
| 150 | | SQL-NET |
| 151 | | HEMS |
| 152 | | Background File Transfer Program (BFTP) |
| 153 | | SGMP |
| 154 | | NETSC |
| 155 | | NETSC |
| 156 | | SQL Service |
| 157 | | KNET/VM Command/Message Protocol |
| 158 | | PCMail Server |
| 159 | | NSS-Routing |
| 160 | | SGMP-TRAPS |
| 161 | | SNMP |
| 162 | | SNMPTRAP |
| 163 | | CMIP/TCP Manager |
| 164 | | CMIP/TCP Agent |
| 165 | | Xerox |
| 166 | | Sirius Systems |
| 167 | | NAMP |
| 168 | | RSVD |
| 169 | | |
| 170 | | Network PostScript |
| 171 | | Network Innovations Multiplex |
| 172 | | Network Innovations CL/1 |
| 173 | | Xyplex |
| 174 | | MAILQ |
| 175 | | vmnet |
| 176 | | GENRAD-MUX |
| 177 | | X Display Manager Control Protocol (XDMCP) |
| 178 | | NextStep Window Server |
| 179 | | Border Gateway Protocol (BGP) |
| 180 | | Intergraph / SLmail admin |
| 181 | | Unify |
| 182 | | Unisys Audit SITP |
| 183 | | OCBinder |
| 184 | | OCServer |
| 185 | | Remote-KIS |
| 186 | | KIS Protocol |
| 187 | | Application Communication Interface |
| 188 | | Plus Five's MUMPS |
| 189 | | Queued File Transport |
| 190 | | Gateway Access Control Protocol |
| 191 | | Prospero Directory Service |
| 192 | | OSU Network Monitoring System |
| 193 | | Spider Remote Monitoring Protocol |
| 194 | | |
| 195 | | DNSIX Network Level Module Audit |
| 196 | | DNSIX Session Mgt Module Audit Redir |
| 197 | | Directory Location Service |
| 198 | | Directory Location Service Monitor |
| 199 | | smux |
| 200 | | IBM System Resource Controller |
| 201 | | AppleTalk Routing Maintenance |
| 202 | | AppleTalk Name Binding |
| 203 | | AppleTalk Unused |
| 204 | | AppleTalk Echo |
| 205 | | AppleTalk Unused |
| 206 | | AppleTalk Zone Information |
| 207 | | AppleTalk Unused |
| 208 | | AppleTalk Unused |
| 209 | | Trivial Authenticated Mail Protocol |
| 210 | | ANSI Z39.50 |
| 211 | | Texas Instruments 914C/G Terminal |
| 212 | | |
| 213 | | IPX |
| 213 | | |
| 214 | | VM PWSCS |
| 215 | | Insignia Solutions |
| 216 | | Access Technology License Server |
| 217 | | dBASE Unix |
| 218 | | Netix Message Posting Protocol (MPP) |
| 219 | | Unisys ARPs |
| 220 | | Interactive Mail Access Protocol v3 (IMAP3) |
| 221 | | Berkeley rlogind with SPX auth |
| 222 | | Berkeley rshd with SPX auth |
| 223 | | Certificate Distribution Center |
| 243 | | Survey Measurement |
| 245 | | LINK |
| 246 | | Display Systems Protocol 3270 |
| 259 | | ESRO |
| 264 | | FW1_topo |
| 311 | | Apple WebAdmin |
| 344 | | Prospero Data Access Protocol |
| 345 | | Perf Analysis Workbench |
| 346 | | Zebra server |
| 347 | | Fatmen Server |
| 348 | | Cabletron Management Protocol |
| 350 | | MATIP type A |
| 351 | | MATIP type B |
| 360 | | |
| 363 | | RSVP tunnel |
| 366 | | ODMR (On-Demand Mail Relay) |
| 371 | | Clearcase |
| 372 | | Unix Listserv |
| 373 | | Legent Corporation |
| 374 | | Legent Corporation |
| 375 | | Hassle |
| 376 | | Amiga Envoy Network Inquiry Proto |
| 377 | | NEC Corporation |
| 378 | | NEC Corporation |
| 379 | | TIA/EIA/IS-99 modem client |
| 380 | | TIA/EIA/IS-99 modem client |
| 381 | | hp performance data collector |
| 382 | | hp performance data managed node |
| 383 | | hp performance data alarm manager |
| 384 | | A Remote Network Server System |
| 385 | | IBM Application |
| 386 | | ASA Message Router Object Def. |
| 387 | | AURP (AppleTalk Update-Based Routing Protocol) |
| 388 | | Unidata LDM Version 4 |
| 389 | | LDAP |
| 390 | | UIS |
| 391 | | SynOptics SNMP Relay Port |
| 392 | | SynOptics Port Broker Port |
| 393 | | Data Interpretation System |
| 394 | | EMBL Nucleic Data Transfer |
| 395 | | NETscout Control Protocol |
| 396 | | Novell Netware over IP |
| 397 | | Multi Protocol Trans. Net. |
| 398 | | Kryptolan |
| 399 | | ISO-TSAP Class 2 |
| 400 | | Workstation Solutions |
| 401 | | |
| 402 | | Genie Protocol |
| 403 | | decap |
| 404 | | nced |
| 405 | | ncld |
| 406 | | Interactive Mail Support Protocol |
| 407 | | Timbuktu |
| 408 | | Prospero Resource Manager Sys. Man. |
| 409 | | Prospero Resource Manager Node Man |
| 410 | | |
| 411 | | Remote MT Protocol |
| 412 | | Trap Convention Port |
| 413 | | SMSP |
| 414 | | InfoSeek |
| 415 | | BNet |
| 416 | | Silverplatter |
| 417 | | Onmux |
| 418 | | Hyper-G |
| 419 | | Ariel |
| 420 | | |
| 421 | | Ariel |
| 422 | | Ariel |
| 423 | | IBM Operations Planning and Control Start |
| 424 | | IBM Operations Planning and Control Track |
| 425 | | ICAD |
| 426 | | smartsdp |
| 427 | | Server Location |
| 428 | | OCS_CMU |
| 429 | | OCS_AMU |
| 430 | | UTMPSD |
| 431 | | UTMPCD |
| 432 | | IASD |
| 433 | | NNSP |
| 434 | | Mobile IP |
| 435 | | Mobile IP-MN |
| 436 | | DNA-CML |
| 437 | | comscm |
| 438 | | dsfgw |
| 439 | | dasp Thomas Obermair |
| 440 | | sgcp |
| 441 | | decvms-sysmgt |
| 442 | | cvc_hostd |
| 443 | | https MCom / ssl |
| 444 | | Simple Network Paging Protocol (snpp) |
| 445 | | SMB |
| 446 | | DDM-RDB |
| 447 | | DDM-RFM |
| 448 | | DDM-BYTE |
| 449 | | AS Server Mapper |
| 450 | | TServer |
| 451 | | Cray Network Semaphore server |
| 452 | | Cray SFS config server |
| 453 | | CreativeServer |
| 454 | | ContentServer |
| 455 | | CreativePartnr |
| 456 | | macon-tcp |
| 457 | | scohelp |
| 458 | | apple quick time / TV Conferencing |
| 459 | | ampr-rcmd |
| 460 | | skronk |
| 461 | | |
| 468 | | Photuris |
| 475 | | |
| 500 | | ISAKMP, pluto |
| 511 | | |
| 512 | | biff, remote process execution |
| 513 | | who, remote login a la telnet (rlogin) |
| 514 | | syslog, like exec, but automatic (rsh) |
| 515 | | lp, lpr, line printer, spooler |
| 517 | | talk |
| 518 | | ntalk |
| 519 | | ntalk |
| 520 | | extended file name server / RIP (Routing Information Protocol) |
| 521 | | RIPng |
| 522 | | ULS |
| 525 | | timeserver |
| 526 | | newdate |
| 530 | | rpc |
| 531 | | chat (IRC) |
| 532 | | readnews |
| 533 | | for emergency broadcasts |
| 539 | | Apertus Technologies Load Determination |
| 540 | | uucpd |
| 541 | | uucp-rlogin |
| 542 | | |
| 543 | | KLogin, AppleShare over IP |
| 544 | | krcmd-kshell |
| 545 | | QuickTime |
| 548 | | AFP |
| 550 | | krcmd-kshell |
| 554 | | Real Time Streaming Protocol |
| 555 | | phAse Zero |
| 556 | | rfs server |
| 557 | | openvms-sysipc |
| 558 | | SDNSKMP |
| 559 | | TEEDTAP |
| 560 | | rmonitord |
| 561 | | |
| 562 | | chcmd-chshell |
| 563 | | NNTP over SSL |
| 564 | | plan 9 file service |
| 565 | | whoami |
| 570 | | demon-meter |
| 571 | | udemon-meter |
| 575 | | VEMMI |
| 581 | | Bundle Discovery Protocol |
| 593 | | MS-RPC |
| 600 | | Sun IPC server |
| 606 | | Cray Unified Resource Manager |
| 607 | | nqs |
| 608 | | Sender-Initiated/Unsolicited File Transfer (SIFT/UFT) |
| 609 | | npmp-trap |
| 610 | | npmp-local |
| 611 | | npmp-gui |
| 626 | | Apple ASIA |
| 631 | | IPP (Internet Printing Protocol) |
| 634 | | ginad |
| 635 | | mountd |
| 636 | | sldap |
| 642 | | EMSD |
| 648 | | RRP (NSI Registry Registrar Protocol) |
| 655 | | tinc |
| 660 | | Apple MacOS Server Admin |
| 666 | | mdqs / doom Id Software |
| 674 | | ACAP |
| 687 | | AppleShare IP Registry |
| 700 | | buddyphone |
| 704 | | errlog copy/server daemon |
| 705 | | AgentX for SNMP |
| 709 | | EntrustManager |
| 729 | | IBM NetView DM/6000 Server/Client |
| 730 | | IBM NetView DM/6000 send/tcp |
| 731 | | IBM NetView DM/6000 receive/tcp |
| 741 | | netGW |
| 742 | | Network based Rev. Cont. Sys. |
| 744 | | Flexible License Manager |
| 747 | | Fujitsu Device Control |
| 748 | | Russell Info Sci Calendar Manager |
| 749 | | kerberos administration |
| 750 | | rfile |
| 751 | | pump |
| 753 | | rrh |
| 754 | | tell-send |
| 758 | | nlogin |
| 759 | | con |
| 760 | | ns |
| 761 | | rxe |
| 762 | | quotad |
| 763 | | cycleserv |
| 764 | | omserv |
| 765 | | webster |
| 767 | | phonebook |
| 769 | | vid |
| 770 | | cadlock |
| 771 | | rtip |
| 772 | | cycleserv2 |
| 773 | | submit |
| 774 | | rpassword |
| 775 | | entomb |
| 776 | | wpages |
| 780 | | wpgs |
| 786 | | Concert |
| 800 | | mdbs_daemon |
| 801 | | device |
| 888 | | AccessBuilder |
| 901 | | swat, realsecure |
| 993 | | s-imap |
| 995 | | s-pop |
| 996 | | Central Point Software-xtreelic |
| 997 | | maitrd |
| 998 | | busboy |
| 999 | | garcon / puprouter |
| 1000 | | cadlock |
| 1023 | | Reserved |
| 1024 | | Reserved |
| 1025 | | Reserved |
| 10030 | | BBN IAD |
| 10031 | | BBN IAD |
| 10032 | | BBN IAD |
| 1058 | | nim |
| 10059 | | nimreg |
| 1062 | | Veracity |
| 10067 | | Installation Bootstrap Proto. Serv |
| 10068 | | Installation Bootstrap Proto. Cli. |
| 1080 | | SOCKS |
| 10083 | | Anasoft License Manager |
| 10084 | | Anasoft License Manager |
| 1085 | | WebObjects |
| 1100 | | |
| 1110 | | Cluster status info |
| 1114 | | |
| 1155 | | Network File Access |
| 1212 | | lupa |
| 1222 | | SNI R&D network |
| 1227 | | DNS2Go |
| 1234 | | |
| 1243 | | SubSeven |
| 1338 | | Millennium Worm |
| 1248 | | hermes |
| 1346 | | Alta Analytics License Manager |
| 1347 | | multi media conferencing |
| 1348 | | multi media conferencing |
| 1349 | | Registration Network Protocol-sbook |
| 1350 | | Registration Network Protocol-editbench |
| 1351 | | Digital Tool Works (MIT)-equationbuilder |
| 1352 | | Lotus Notes |
| 1353 | | Relief Consulting |
| 1354 | | RightBrain Software |
| 1355 | | Intuitive Edge |
| 1356 | | CuillaMartin Company |
| 1357 | | Electronic PegBoard |
| 1358 | | CONNLCLI |
| 1359 | |
