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| 1 | Port | TCP | UDP | IANA status[1] | Description |
|---|---|---|---|---|---|
| 2 | 0 | Reserved | Reserved | Official | |
| 3 | 0 | N/A | N/A | Unofficial | In programming APIs (not in communication between hosts), requests a system-allocated (dynamic) port[5] |
| 4 | 1 | Yes | Assigned | Official | TCP Port Service Multiplexer (TCPMUX). Historic. Both TCP and UDP have been assigned to TCPMUX by IANA,[1] but by design only TCP is specified.[6] |
| 5 | 5 | Assigned | Assigned | Official | Remote Job Entry[7] was historically using socket 5 in its old socket form, while MIB PIM has identified it as TCP/5[8] and IANA has assigned both TCP and UDP 5 to it. |
| 6 | 7 | Yes | Yes | Official | Echo Protocol[9][10] |
| 7 | 9 | Yes, and SCTP[11] | Yes | Official | Discard Protocol[12] |
| 8 | 9 | No | Yes | Unofficial | Wake-on-LAN[13] |
| 9 | 11 | Yes | Yes | Official | Active Users (systat service)[14][15] |
| 10 | 13 | Yes | Yes | Official | Daytime Protocol[16] |
| 11 | 15 | Yes | No | Unofficial | Previously netstat service[1][14] |
| 12 | 17 | Yes | Yes | Official | Quote of the Day (QOTD)[17] |
| 13 | 18 | Yes | Yes | Official | Message Send Protocol[18][19] |
| 14 | 19 | Yes | Yes | Official | Character Generator Protocol (CHARGEN)[20] |
| 15 | 20 | Yes, and SCTP[11] | Assigned | Official | File Transfer Protocol (FTP) data transfer[10] |
| 16 | 21 | Yes, and SCTP[11] | Assigned | Official | File Transfer Protocol (FTP) control (command)[10][11][21][22] |
| 17 | 22 | Yes, and SCTP[11] | Assigned | Official | Secure Shell (SSH),[10] secure logins, file transfers (scp, sftp) and port forwarding |
| 18 | 23 | Yes | Assigned | Official | Telnet protocol—unencrypted text communications[10][23] |
| 19 | 25 | Yes | Assigned | Official | Simple Mail Transfer Protocol (SMTP),[10][24] used for email routing between mail servers |
| 20 | 37 | Yes | Yes | Official | Time Protocol[25] |
| 21 | 38 | Yes | Yes | Official | Route Access Protocol (RAP)[26][importance?] |
| 22 | 39 | Assigned | Yes | Official | Resource Location Protocol (RLP)[27][importance?]—used for determining the location of higher level services from hosts on a network |
| 23 | 42 | Assigned | Yes | Official | Host Name Server Protocol[28] |
| 24 | 43 | Yes | Assigned | Official | WHOIS protocol[29][30][31] |
| 25 | 47 | Reserved | Reserved | Official | |
| 26 | 49 | Yes | Yes | Official | TACACS Login Host protocol.[32] TACACS+, still in draft which is an improved but dinstinct version of TACACS, only uses TCP 49.[33] |
| 27 | 50 | Assigned | Yes | Official | Remote Mail Checking Protocol[34][importance?] |
| 28 | 51 | Reserved | Reserved | Official | Historically used for Interface Message Processor logical address management,[35] entry has been removed by IANA on 2013-05-25 |
| 29 | 52 | Assigned | Assigned | Official | Xerox Network Systems (XNS) Time Protocol. Despite this port being assigned by IANA, the service is meant to work on SPP (ancestor of IPX/SPX), instead of TCP/IP.[36] |
| 30 | 53 | Yes | Yes | Official | Domain Name System (DNS)[37][10] |
| 31 | 54 | Assigned | Assigned | Official | Xerox Network Systems (XNS) Clearinghouse (Name Server). Despite this port being assigned by IANA, the service is meant to work on SPP (ancestor of IPX/SPX), instead of TCP/IP.[36] |
| 32 | 56 | Assigned | Assigned | Official | Xerox Network Systems (XNS) Authentication Protocol. Despite this port being assigned by IANA, the service is meant to work on SPP (ancestor of IPX/SPX), instead of TCP/IP.[36] |
| 33 | 58 | Assigned | Assigned | Official | Xerox Network Systems (XNS) Mail. Despite this port being assigned by IANA, the service is meant to work on SPP (ancestor of IPX/SPX), instead of TCP/IP.[36] |
| 34 | 61 | Reserved | Reserved | Official | Historically assigned to the NIFTP-Based Mail protocol[38], but was never documented in the related IEN.[39] The port number entry was removed from IANA's registry on 2017-05-18.[1] |
| 35 | 67 | Assigned | Yes | Official | Bootstrap Protocol (BOOTP) server;[10] also used by Dynamic Host Configuration Protocol (DHCP) |
| 36 | 68 | Assigned | Yes | Official | Bootstrap Protocol (BOOTP) client;[10] also used by Dynamic Host Configuration Protocol (DHCP) |
| 37 | 69 | Assigned | Yes | Official | Trivial File Transfer Protocol (TFTP)[10][40][41][42] |
| 38 | 70 | Yes | Assigned | Official | Gopher protocol[43] |
| 39 | 71–74 | Yes | Yes | Official | NETRJS protocol[44][45][46] |
| 40 | 79 | Yes | Assigned | Official | Finger protocol[10][47][48] |
| 41 | 80 | Yes, and SCTP[11] | Assigned | Official | Hypertext Transfer Protocol (HTTP)[10][49][50][51] |
| 42 | 80 | No | Yes | Unofficial | Quick UDP Internet Connections (QUIC), a transport protocol over UDP (still in draft as of July 2018), using stream multiplexing, encryption by default with TLS, and currently supporting HTTP/2.[52] |
| 43 | 81 | Yes | Unofficial | TorPark onion routing[verification needed] | |
| 44 | 82 | Yes | Unofficial | TorPark control[verification needed] | |
| 45 | 88 | Yes | Assigned | Official | Kerberos[10][53][54] authentication system |
| 46 | 90 | Yes | Yes | Unofficial | PointCast (dotcom)[1][third-party source needed] |
| 47 | 101 | Yes | Assigned | Official | NIC host name[55] |
| 48 | 102 | Yes | Assigned | Official | ISO Transport Service Access Point (TSAP) Class 0 protocol;[56][57] |
| 49 | 104 | Yes | Yes | Official | Digital Imaging and Communications in Medicine (DICOM; also port 11112) |
| 50 | 105 | Yes | Yes | Official | CCSO Nameserver[58] |
| 51 | 107 | Yes | Yes | Official | Remote User Telnet Service (RTelnet)[59] |
| 52 | 108 | Yes | Yes | Official | IBM Systems Network Architecture (SNA) gateway access server |
| 53 | 109 | Yes | Assigned | Official | Post Office Protocol, version 2 (POP2)[60] |
| 54 | 110 | Yes | Assigned | Official | Post Office Protocol, version 3 (POP3)[10][61][62] |
| 55 | 111 | Yes | Yes | Official | Open Network Computing Remote Procedure Call (ONC RPC, sometimes referred to as Sun RPC) |
| 56 | 113 | Yes | No | Official | Ident, authentication service/identification protocol,[10][63] used by IRC servers to identify users |
| 57 | 113 | Yes | Assigned | Official | Authentication Service (auth), the predecessor to identification protocol. Used to determine a user's identity of a particular TCP connection.[64] |
| 58 | 115 | Yes | Assigned | Official | Simple File Transfer Protocol[10][65] |
| 59 | 117 | Yes | Yes | Official | UUCP Mapping Project (path service)[citation needed] |
| 60 | 118 | Yes | Yes | Official | Structured Query Language (SQL) Services[jargon] |
| 61 | 119 | Yes | Assigned | Official | Network News Transfer Protocol (NNTP),[10] retrieval of newsgroup messages[66][67] |
| 62 | 123 | Assigned | Yes | Official | Network Time Protocol (NTP), used for time synchronization[10] |
| 63 | 126 | Yes | Yes | Official | Formerly Unisys Unitary Login, renamed by Unisys to NXEdit. Used by Unisys Programmer's Workbench for Clearpath MCP, an IDE for Unisys MCP software development |
| 64 | 135 | Yes | Yes | Official | DCE endpoint resolution |
| 65 | 135 | Yes | Yes | Official | Microsoft EPMAP (End Point Mapper), also known as DCE/RPC Locator service,[68] used to remotely manage services including DHCP server, DNS server and WINS. Also used by DCOM |
| 66 | 137 | Yes | Yes | Official | NetBIOS Name Service, used for name registration and resolution[69][70] |
| 67 | 138 | Assigned | Yes | Official | NetBIOS Datagram Service[10][69][70] |
| 68 | 139 | Yes | Assigned | Official | NetBIOS Session Service[69][70] |
| 69 | 143 | Yes | Assigned | Official | Internet Message Access Protocol (IMAP),[10] management of electronic mail messages on a server[71] |
| 70 | 152 | Yes | Yes | Official | Background File Transfer Program (BFTP)[72][importance?] |
| 71 | 153 | Yes | Yes | Official | Simple Gateway Monitoring Protocol (SGMP), a protocol for remote inspection and alteration of gateway management information[73] |
| 72 | 156 | Yes | Yes | Official | Structured Query Language (SQL) Service[jargon] |
| 73 | 158 | Yes | Yes | Official | Distributed Mail System Protocol (DMSP, sometimes referred to as Pcmail)[74][importance?] |
| 74 | 161 | Assigned | Yes | Official | Simple Network Management Protocol (SNMP)[75][citation needed][10] |
| 75 | 162 | Yes | Yes | Official | Simple Network Management Protocol Trap (SNMPTRAP)[75][76][citation needed] |
| 76 | 170 | Yes | Yes | Official | Network PostScript print server |
| 77 | 177 | Yes | Yes | Official | X Display Manager Control Protocol (XDMCP), used for remote logins to an X Display Manager server[77] |
| 78 | 179 | Yes, and SCTP[11] | Assigned | Official | Border Gateway Protocol (BGP),[78] used to exchange routing and reachability information among autonomous systems (AS) on the Internet |
| 79 | 194 | Yes | Yes | Official | Internet Relay Chat (IRC)[79] |
| 80 | 199 | Yes | Yes | Official | SNMP multiplexing protocol (SMUX)[80][81][importance?] |
| 81 | 201 | Yes | Yes | Official | AppleTalk Routing Maintenance |
| 82 | 209 | Yes | Assigned | Official | Quick Mail Transfer Protocol[82] |
| 83 | 210 | Yes | Yes | Official | ANSI Z39.50 |
| 84 | 213 | Yes | Yes | Official | Internetwork Packet Exchange (IPX) |
| 85 | 218 | Yes | Yes | Official | Message posting protocol (MPP) |
| 86 | 220 | Yes | Yes | Official | Internet Message Access Protocol (IMAP), version 3 |
| 87 | 225–241 | Reserved | Reserved | Official | |
| 88 | 249–255 | Reserved | Reserved | Official | |
| 89 | 259 | Yes | Yes | Official | Efficient Short Remote Operations (ESRO) |
| 90 | 262 | Yes | Yes | Official | Arcisdms |
| 91 | 264 | Yes | Yes | Official | Border Gateway Multicast Protocol (BGMP) |
| 92 | 280 | Yes | Yes | Official | http-mgmt |
| 93 | 300 | Yes | Unofficial | ThinLinc Web Access | |
| 94 | 308 | Yes | Official | Novastor Online Backup | |
| 95 | 311 | Yes | Assigned | Official | Mac OS X Server Admin[10] (officially AppleShare IP Web administration[1]) |
| 96 | 318 | Yes | Yes | Official | PKIX Time Stamp Protocol (TSP) |
| 97 | 319 | Yes | Official | Precision Time Protocol (PTP) event messages | |
| 98 | 320 | Yes | Official | Precision Time Protocol (PTP) general messages | |
| 99 | 350 | Yes | Yes | Official | Mapping of Airline Traffic over Internet Protocol (MATIP) type A |
| 100 | 351 | Yes | Yes | Official | MATIP type B |
| 101 | 356 | Yes | Yes | Official | cloanto-net-1 (used by Cloanto Amiga Explorer and VMs) |
| 102 | 366 | Yes | Yes | Official | On-Demand Mail Relay (ODMR) |
| 103 | 369 | Yes | Yes | Official | Rpc2portmap |
| 104 | 370 | Yes | Yes | Official | codaauth2, Coda authentication server |
| 105 | 370 | Yes | Official | securecast1, outgoing packets to NAI's SecureCast servers[83]As of 2000 | |
| 106 | 371 | Yes | Yes | Official | ClearCase albd |
| 107 | 383 | Yes | Yes | Official | HP data alarm manager |
| 108 | 384 | Yes | Yes | Official | A Remote Network Server System |
| 109 | 387 | Yes | Yes | Official | AURP (AppleTalk Update-based Routing Protocol)[84] |
| 110 | 388 | Yes | Assigned | Official | Unidata LDM near real-time data distribution protocol[85][86] |
| 111 | 389 | Yes | Assigned | Official | Lightweight Directory Access Protocol (LDAP)[10] |
| 112 | 399 | Yes | Yes | Official | Digital Equipment Corporation DECnet (Phase V+) over TCP/IP |
| 113 | 401 | Yes | Yes | Official | Uninterruptible power supply (UPS) |
| 114 | 427 | Yes | Yes | Official | Service Location Protocol (SLP)[10] |
| 115 | 433 | Yes | Yes | Official | NNSP, part of Network News Transfer Protocol |
| 116 | 434 | Yes | Yes | Official | Mobile IP Agent (RFC 5944) |
| 117 | 443 | Yes, and SCTP[11] | Assigned | Official | Hypertext Transfer Protocol over TLS/SSL (HTTPS)[10] |
| 118 | 443 | No | Yes | Unofficial | Quick UDP Internet Connections (QUIC), a transport protocol over UDP (still in draft as of July 2018), using stream multiplexing, encryption by default with TLS, and currently supporting HTTP/2.[52] |
| 119 | 444 | Yes | Yes | Official | Simple Network Paging Protocol (SNPP), RFC 1568 |
| 120 | 445 | Yes | Yes | Official | Microsoft-DS (Directory Services) Active Directory,[87] Windows shares |
| 121 | 445 | Yes | Assigned | Official | Microsoft-DS (Directory Services) SMB[10] file sharing |
| 122 | 464 | Yes | Yes | Official | Kerberos Change/Set password |
| 123 | 465 | Yes | No | Official | URL Rendezvous Directory for SSM (Cisco protocol)[importance?] |
| 124 | 465 | Yes | No | Official | Authenticated SMTP[10] over TLS/SSL (SMTPS)[88] |
| 125 | 475 | Yes | Yes | Official | tcpnethaspsrv, Aladdin Knowledge Systems Hasp services |
| 126 | 491 | Yes | Unofficial | GO-Global remote access and application publishing software | |
| 127 | 497 | Yes | Yes | Official | Retrospect |
| 128 | 500 | Assigned | Yes | Official | Internet Security Association and Key Management Protocol (ISAKMP) / Internet Key Exchange (IKE)[10] |
| 129 | 502 | Yes | Yes | Official | Modbus Protocol |
| 130 | 504 | Yes | Yes | Official | Citadel, multiservice protocol for dedicated clients for the Citadel groupware system |
| 131 | 510 | Yes | Yes | Official | FirstClass Protocol (FCP), used by FirstClass client/server groupware system |
| 132 | 512 | Yes | Official | Rexec, Remote Process Execution | |
| 133 | 512 | Yes | Official | comsat, together with biff | |
| 134 | 513 | Yes | Official | rlogin | |
| 135 | 513 | Yes | Official | Who[89] | |
| 136 | 514 | Yes | Official | Remote Shell, used to execute non-interactive commands on a remote system (Remote Shell, rsh, remsh) | |
| 137 | 514 | No | Yes | Official | Syslog,[10] used for system logging |
| 138 | 515 | Yes | Assigned | Official | Line Printer Daemon (LPD),[10] print service |
| 139 | 517 | Yes | Official | Talk | |
| 140 | 518 | Yes | Official | NTalk | |
| 141 | 520 | Yes | Official | efs, extended file name server | |
| 142 | 520 | Yes | Official | Routing Information Protocol (RIP) | |
| 143 | 521 | Yes | Official | Routing Information Protocol Next Generation (RIPng) | |
| 144 | 524 | Yes | Yes | Official | NetWare Core Protocol (NCP) is used for a variety things such as access to primary NetWare server resources, Time Synchronization, etc. |
| 145 | 525 | Yes | Official | Timed, Timeserver | |
| 146 | 530 | Yes | Yes | Official | Remote procedure call (RPC) |
| 147 | 532 | Yes | Assigned | Official | netnews[10] |
| 148 | 533 | Yes | Official | netwall, For Emergency Broadcasts | |
| 149 | 540 | Yes | Official | Unix-to-Unix Copy Protocol (UUCP) | |
| 150 | 542 | Yes | Yes | Official | commerce (Commerce Applications) |
| 151 | 543 | Yes | Official | klogin, Kerberos login | |
| 152 | 544 | Yes | Official | kshell, Kerberos Remote shell | |
| 153 | 546 | Yes | Yes | Official | DHCPv6 client |
| 154 | 547 | Yes | Yes | Official | DHCPv6 server |
| 155 | 548 | Yes | Assigned | Official | Apple Filing Protocol (AFP) over TCP[10] |
| 156 | 550 | Yes | Yes | Official | new-rwho, new-who[89] |
| 157 | 554 | Yes | Yes | Official | Real Time Streaming Protocol (RTSP)[10] |
| 158 | 556 | Yes | Official | Remotefs, RFS, rfs_server | |
| 159 | 560 | Yes | Official | rmonitor, Remote Monitor | |
| 160 | 561 | Yes | Official | monitor | |
| 161 | 563 | Yes | Yes | Official | NNTP over TLS/SSL (NNTPS) |
| 162 | 564 | Yes | Unofficial | 9P (Plan 9) | |
| 163 | 585 | Port 993 | ? | Unofficial | Legacy use of Internet Message Access Protocol over TLS/SSL (IMAPS), now in use at port 993.[90] |
| 164 | 587 | Yes | Assigned | Official | email message submission[10][91] (SMTP) |
| 165 | 591 | Yes | Official | FileMaker 6.0 (and later) Web Sharing (HTTP Alternate, also see port 80) | |
| 166 | 593 | Yes | Yes | Official | HTTP RPC Ep Map, Remote procedure call over Hypertext Transfer Protocol, often used by Distributed Component Object Model services and Microsoft Exchange Server |
| 167 | 601 | Yes | Official | Reliable Syslog Service — used for system logging | |
| 168 | 604 | Yes | Official | TUNNEL profile,[92] a protocol for BEEP peers to form an application layer tunnel | |
| 169 | 623 | Yes | Official | ASF Remote Management and Control Protocol (ASF-RMCP) & IPMI Remote Management Protocol | |
| 170 | 625 | Yes | No | Unofficial | Open Directory Proxy (ODProxy)[10] |
| 171 | 631 | Yes | Yes | Official | Internet Printing Protocol (IPP)[10] |
| 172 | 631 | Yes | Yes | Unofficial | Common Unix Printing System (CUPS) administration console (extension to IPP) |
| 173 | 635 | Yes | Yes | Official | RLZ DBase |
| 174 | 636 | Yes | Assigned | Official | Lightweight Directory Access Protocol over TLS/SSL (LDAPS)[10] |
| 175 | 639 | Yes | Yes | Official | MSDP, Multicast Source Discovery Protocol |
| 176 | 641 | Yes | Yes | Official | SupportSoft Nexus Remote Command (control/listening), a proxy gateway connecting remote control traffic |
| 177 | 643 | Yes | Yes | Official | SANity |
| 178 | 646 | Yes | Yes | Official | Label Distribution Protocol (LDP), a routing protocol used in MPLS networks |
| 179 | 647 | Yes | Official | DHCP Failover protocol[93] | |
| 180 | 648 | Yes | Official | Registry Registrar Protocol (RRP)[94] | |
| 181 | 651 | Yes | Yes | Official | IEEE-MMS |
| 182 | 653 | Yes | Yes | Official | SupportSoft Nexus Remote Command (data), a proxy gateway connecting remote control traffic |
| 183 | 654 | Yes | Official | Media Management System (MMS) Media Management Protocol (MMP)[95] | |
| 184 | 655 | Yes | Yes | Official | Tinc VPN daemon |
| 185 | 657 | Yes | Yes | Official | IBM RMC (Remote monitoring and Control) protocol, used by System p5 AIX Integrated Virtualization Manager (IVM)[96] and Hardware Management Console to connect managed logical partitions (LPAR) to enable dynamic partition reconfiguration |
| 186 | 660 | Yes | Assigned | Official | Mac OS X Server administration,[1] version 10.4 and earlier[10] |
| 187 | 666 | Yes | Yes | Official | Doom, first online first-person shooter |
| 188 | 666 | Yes | Unofficial | airserv-ng, aircrack-ng's server for remote-controlling wireless devices | |
| 189 | 674 | Yes | Official | Application Configuration Access Protocol (ACAP) | |
| 190 | 688 | Yes | Yes | Official | REALM-RUSD (ApplianceWare Server Appliance Management Protocol) |
| 191 | 690 | Yes | Yes | Official | Velneo Application Transfer Protocol (VATP) |
| 192 | 691 | Yes | Official | MS Exchange Routing | |
| 193 | 694 | Yes | Yes | Official | Linux-HA high-availability heartbeat |
| 194 | 695 | Yes | Official | IEEE Media Management System over SSL (IEEE-MMS-SSL)[97] | |
| 195 | 698 | Yes | Official | Optimized Link State Routing (OLSR) | |
| 196 | 700 | Yes | Official | Extensible Provisioning Protocol (EPP), a protocol for communication between domain name registries and registrars (RFC 5734) | |
| 197 | 701 | Yes | Official | Link Management Protocol (LMP),[98] a protocol that runs between a pair of nodes and is used to manage traffic engineering (TE) links | |
| 198 | 702 | Yes | Official | IRIS[99][100] (Internet Registry Information Service) over BEEP (Blocks Extensible Exchange Protocol)[101] (RFC 3983) | |
| 199 | 706 | Yes | Official | Secure Internet Live Conferencing (SILC) | |
| 200 | 711 | Yes | Official | Cisco Tag Distribution Protocol[102][103][104]—being replaced by the MPLS Label Distribution Protocol[105] | |
| 201 | 712 | Yes | Official | Topology Broadcast based on Reverse-Path Forwarding routing protocol (TBRPF; RFC 3684) | |
| 202 | 749 | Yes | Yes | Official | Kerberos (protocol) administration[10] |
| 203 | 750 | Yes | Official | kerberos-iv, Kerberos version IV | |
| 204 | 751 | Yes | Yes | Unofficial | kerberos_master, Kerberos authentication |
| 205 | 752 | Yes | Unofficial | passwd_server, Kerberos password (kpasswd) server | |
| 206 | 753 | Yes | Yes | Official | Reverse Routing Header (RRH)[106] |
| 207 | 753 | Yes | Unofficial | userreg_server, Kerberos userreg server | |
| 208 | 754 | Yes | Yes | Official | tell send |
| 209 | 754 | Yes | Unofficial | krb5_prop, Kerberos v5 slave propagation | |
| 210 | 760 | Yes | Yes | Unofficial | krbupdate [kreg], Kerberos registration |
| 211 | 782 | Yes | Unofficial | Conserver serial-console management server | |
| 212 | 783 | Yes | Unofficial | SpamAssassin spamd daemon | |
| 213 | 800 | Yes | Yes | Official | mdbs-daemon |
| 214 | 808 | Yes | Unofficial | Microsoft Net.TCP Port Sharing Service | |
| 215 | 829 | Yes | Assigned | Official | Certificate Management Protocol[107] |
| 216 | 830 | Yes | Yes | Official | NETCONF over SSH |
| 217 | 831 | Yes | Yes | Official | NETCONF over BEEP |
| 218 | 832 | Yes | Yes | Official | NETCONF for SOAP over HTTPS |
| 219 | 833 | Yes | Yes | Official | NETCONF for SOAP over BEEP |
| 220 | 843 | Yes | Unofficial | Adobe Flash[108] | |
| 221 | 847 | Yes | Official | DHCP Failover protocol | |
| 222 | 848 | Yes | Yes | Official | Group Domain Of Interpretation (GDOI) protocol |
| 223 | 853 | Yes | Yes | Official | DNS over TLS (RFC 7858) |
| 224 | 860 | Yes | Official | iSCSI (RFC 3720) | |
| 225 | 861 | Yes | Yes | Official | OWAMP control (RFC 4656) |
| 226 | 862 | Yes | Yes | Official | TWAMP control (RFC 5357) |
| 227 | 873 | Yes | Official | rsync file synchronization protocol | |
| 228 | 888 | Yes | Unofficial | cddbp, CD DataBase (CDDB) protocol (CDDBP) | |
| 229 | 888 | Yes | Unofficial | IBM Endpoint Manager Remote Control | |
| 230 | 897 | Yes | Yes | Unofficial | Brocade SMI-S RPC |
| 231 | 898 | Yes | Yes | Unofficial | Brocade SMI-S RPC SSL |
| 232 | 902 | Yes | Yes | Unofficial | VMware ESXi[109][110] |
| 233 | 903 | Yes | Unofficial | VMware ESXi[109][110] | |
| 234 | 953 | Yes | Reserved | Official | BIND remote name daemon control (RNDC)[111][112] |
| 235 | 981 | Yes | Unofficial | Remote HTTPS management for firewall devices running embedded Check Point VPN-1 software[113] | |
| 236 | 987 | Yes | Unofficial | Microsoft Remote Web Workplace, a feature of Windows Small Business Server[114] | |
| 237 | 989 | Yes | Yes | Official | FTPS Protocol (data), FTP over TLS/SSL |
| 238 | 990 | Yes | Yes | Official | FTPS Protocol (control), FTP over TLS/SSL |
| 239 | 991 | Yes | Yes | Official | Netnews Administration System (NAS)[115] |
| 240 | 992 | Yes | Yes | Official | Telnet protocol over TLS/SSL |
| 241 | 993 | Yes | Assigned | Official | Internet Message Access Protocol over TLS/SSL (IMAPS)[10] |
| 242 | 994 | Reserved | Reserved | Official | |
| 243 | 994 | Maybe | Maybe | Unofficial | Internet Relay Chat over TLS/SSL (IRCS). Previously assigned, but not used in common practice.[79] |
| 244 | 995 | Yes | Yes | Official | Post Office Protocol 3 over TLS/SSL (POP3S)[10] |
| 245 | 1010 | Yes | Unofficial | ThinLinc web-based administration interface[116] | |
| 246 | 1011–1020 | Reserved | Reserved | Official | |
| 247 | 1023 | Reserved | Reserved | Official | [1] |
| 248 | 1023 | Yes | Yes | Unofficial | z/OS Network File System (NFS) (potentially ports 991–1023)[117] |