Webopedia: Well-Known TCP Port Numbers Page 1 of 2 You are in the: Small Business Channel Jump to Website Enter a keyword... ...or choose a category. Go! choose one... Go! Home Term of the Day Well-Known TCP Port New Terms New Links Quick Reference Numbers Did You Know? Search Tool Tech Support In TCP/IP and UDP networks, a port is an endpoint to a logical connection and the way Webopedia Jobs a client program specifies a specific server program on a computer in a network. Some About Us ports have numbers that are preassigned to them by the IANA, and these are known as Link to Us well-known ports (specified in RFC 1700). Port numbers range from 0 to 65536, but Advertising only ports numbers 0 to 1024 are reserved for privileged services and designated as well-known ports. This list of well-known port numbers specifies the port used by the Compare Prices server process as its contact port. Port Number Description Submit a URL 1 TCP Port Service Multiplexer (TCPMUX) Request a Term Report an Error 5 Remote Job Entry (RJE) 7 ECHO 18 Message Send Protocol (MSP) 20 FTP -- Data 21 FTP -- Control Internet News 22 SSH Remote Login Protocol Internet Investing IT 23 Telnet Windows Technology Linux/Open Source 25 Simple Mail Transfer Protocol (SMTP) Developer Interactive Marketing 29 MSG ICP xSP Resources Small Business 37 Time Wireless Internet Downloads 42 Host Name Server (Nameserv) Internet Resources Internet Lists 43 WhoIs International EarthWeb 49 Login Host Protocol (Login) Career Resources 53 Domain Name System (DNS) Search internet.com Advertising Info 69 Trivial File Transfer Protocol (TFTP) Corporate Info 70 Gopher Services 79 Finger Be a Commerce Partner http://www.webopedia.com/quick_ref/portnumbers.asp 4/18/2003 Webopedia: Well-Known TCP Port Numbers Page 2 of 2 Web Hosting Specials Live-Work in Australia Compare Prices & Shop 80 HTTP Build an Online Store Register Domains 103 X.400 Standard Send a Press Release Web Hosting 108 SNA Gateway Access Server Internet Jobs Website Monitoring 109 POP2 Submit Your Site 110 POP3 115 Simple File Transfer Protocol (SFTP) 118 SQL Services 119 Newsgroup (NNTP) 137 NetBIOS Name Service 139 NetBIOS Datagram Service 143 Interim Mail Access Protocol (IMAP) 150 NetBIOS Session Service 156 SQL Server 161 SNMP 179 Border Gateway Protocol (BGP) 190 Gateway Access Control Protocol (GACP) 194 Internet Relay Chat (IRC) 197 Directory Location Service (DLS) 389 Lightweight Directory Access Protocol (LDAP) 396 Novell Netware over IP 443 HTTPS 444 Simple Network Paging Protocol (SNPP) 445 Microsoft-DS 458 Apple QuickTime 546 DHCP Client 547 DHCP Server 563 SNEWS 569 MSN 1080 Socks For further information, see RFC 1700. Copyright 2003 Jupitermedia Corporation All Rights Reserved. Legal Notices, Licensing, Reprints, & Permissions, Privacy Policy. http://www.webopedia.com/quick_ref/portnumbers.asp 4/18/2003.