Ports from RFCs

18 TCP RFC1756 Remote Write Protocol (January 1995)
20 TCP RFC765  File Transfer Protocol
20 TCP RFC959  File Transfer Protocol
21 TCP RFC765  File Transfer Protocol
21 TCP RFC959  File Transfer Protocol
23 TCP RFC764 Telnet Protocol
25 TCP RFC788 Simple Mail Transfer Protocol
25 TCP RFC821  Simple Mail Transfer Protocol
37 TCP RFC2754  Time Protocol
37 TCP RFC868 Time Protocol
43 TCP RFC812  NICNAME/WHOIS
43 TCP RFC2345 Domain Names and Company Name Retrieval (May 1998)
50 UDP RFC1339 Remote Mail Checking Protocol (June 1992)
53 TCP RFC1035 Domain Implementation and Specification (November 1987)
53 TCP RFC1035 Domain Implementation and Specification (November 1987)
53 TCP RFC2021 Remote Network Monitoring MIB (January 1997)
53 UDP RFC1035 Domain Implementation and Specification (November 1987)
53 UDP RFC1035 Domain Implementation and Specification (November 1987)
53 UDP RFC2021 Remote Network Monitoring MIB (January 1997)
53 TCP RFC883 Domain Names - Implementation and Specification (November 1983)
53 UDP RFC883 Domain Names - Implementation and Specification (November 1983)
57 TCP RFC780 Mail Transfer Protocol (May 1981)
70 TCP RFC1436 Gopher (March 1993)
80 TCP RFC1945 HTTP/1.0 (May 1996)
80 TCP RFC2068 HTTP/1.1 (January 1997)
80 TCP RFC2616 HTTP/1.1 (June 1999)
80 TCP RFC2965 HTTP State Management Mechanism (October 2000)
88 UDP RFC1510 Kerberos (September 1993)
96 UDP RFC1249 DIXIE (August 1991)
96 TCP RFC1249 DIXIE (August 1991)
101 TCP RFC811 Hostnames Server
101 TCP RFC1967 Hostnames Server (August 1996)
102 TCP RFC983  ISO Transport Services on Top of the TCP (April 1986)
102 TCP RFC1099 Summary of 1000-1099 (December 1991)
102 TCP RFC1859 ISO Transport and Flow Control (October 1995)
102 TCP RFC2126 ISO Transport on top of TCP (March 1997)
102 TCP www.ietf.org/rfc/rfc983.txt  ()
102 UDP RFC1240 OSI on top of UDP (June 1991)
109 TCP RFC1661 Post Office Protocol - Version 2 (February 1985)
113 TCP RFC1413 Identification Protocol (February 1993)
113 TCP RFC912 Authentication Service (September 1984)
113 TCP RFC931 Authentication Service (January 1985)
117 TCP RFC915 
Network Mail Path Service (December 1984)
120 MISC RFC1235 The Coherent File Distribution Protocol (June 1991)
123 UDP RFC2021 Remote Network Monitoring MIB (January 1997)
146 TCP RFC1086 ISO-TP0 bridge between TCP and X.25 (December 1988)
146 TCP RFC2527  (March 1999)
147 UDP RFC1070 Experimental OSI Net (February 1989)
152 TCP RFC1068 August 1988 ()
153 UDP RFC1028 Simple Gateway Monitoring (November 1987)
161 UDP RFC1351 SNMP Administrative Model (July 1992)
161 UDP RFC1067 SNMP (August 1988)
161 UDP RFC1098 SNMP (April 1989)
161 UDP RFC1157 SNMP (May 1990)
161 UDP RFC1228 SNMP-DPI (May 1991)
161 UDP RFC1445
161 UDP RFC1592 SNMP-DPI (March 1994)
162 UDP : lookup    Messages which report traps should be received on UDP port 162 for
162 UDP : lookup    Messages which report traps should be received on UDP port 162 for
162 UDP : lookup    Messages which report traps should be received on UDP port 162 for
162 UDP RFC1067 SNMP (August 1988)
162 UDP RFC1098 SNMP (April 1989)
162 UDP RFC1157 SNMP (May 1990)
179 TCP RFC1105 A Border Gateway Protocol (BGP) (June 1989)
179 TCP RFC1163 BGP (June 1990)
179 TCP RFC1267 BGP-3 (October 1991)
179 TCP RFC1654 BGP-4 (July 1994)
179 TCP RFC1771 BGP-4 (March 1995)
185 MISC RFC1739 Primer on Internet & TCP/IP Tools (December 1994)
208 UDP RFC1944 Benchmarking Methodology (May 1996)
208 UDP RFC2544 Benchmarking Methodology (March 1999)
208 UDP RFC2544 Benchmarking Methodology (March 1999)
208 UDP RFC3116 Methodology for ATM Benchmarking (June 2001)
210 TCP RFC1729 Using the Z39.50 in the Internet Environment December 1994 ()
218 TCP RFC1204 MPP (February 1991)
255 TCP RFC1963 PPP SDTP (August 1996)
366 TCP RFC2645 On-Demand Mail Relay (August 1999)
387 UDP RFC1504 Appletalk Update-Based Routing Protocol (August 1993)
411 TCP RFC1202 Directory Assistance Service (February 1991)
427 TCP RFC2614 Service Location API (June 1999)
427 UDP RFC2614 Service Location API (June 1999)
434 UDP RFC3220 IP Mobility Support for IPv4 (January 2002)
434 TCP RFC3220 IP Mobility Support for IPv4 (January 2002)
443 TCP RFC2246 The TLS Protocol Version 1.0 (January 1999)
443 TCP RFC2817 HTTP Upgrade to TLS (May 2000)
500 UDP RFC3102 RSIP: Framework (October 2001)
500 UDP RFC3104 RSIP Support for End-to-end IPsec (October 2001)
514 UDP RFC3164 The BSD syslog Protocol (August 2001)
520 UDP RFC1058 Routing Information Protocol (June 1988)
554 TCP RFC2326 Real Time Streaming Protocol (April 1998)
554 UDP RFC2326 Real Time Streaming Protocol (April 1998)
587 TCP RFC2476 Message Submission (December 1998)
631 TCP RFC2565 IPP/1.0: Encoding and Transport (April 1999)
631 TCP RFC2910 IPP/1.1: Encoding and Transport (September 2000)
648 TCP RFC2832 NSI Registry Registrar Protocol (May 2000)
652 UDP RFC3077 LL Tunneling Mechanism for UDLs (March 2001)
1080 TCP RFC2356 Sun's SKIP Firewall Traversal for Mobile IP (June 1998)
1649 TCP RFC2839 Internet Kermit Service (May 2000)
1698 UDP RFC3027 Protocol Complications with NAT (January 2001)
1699 UDP RFC3027 Protocol Complications with NAT (January 2001)
1701 UDP RFC2341 Cisco L2F (May 1998)
1701 UDP RFC2661 L2TP (August 1999)
1723 TCP RFC2637 Point-to-Point Tunneling Protocol (PPTP) (July 1999)
2001 UDP RFC1351 SNMP Administrative Model (July 1992)
2001 UDP RFC1445
2002 UDP RFC1351 SNMP Administrative Model (July 1992)
2004 UDP RFC1351 SNMP Administrative Model (July 1992)
2049 TCP RFC2054 WebNFS Client Specification (October 1996)
2049 TCP RFC3010 NFS version 4 Protocol (December 2000)
2049 TCP RFC2055 WebNFS Server Specification (October 1996)
2049 UDP : lookup    assumes that the server registers on TCP or UDP port 2049 and
2049 UDP RFC2224 NFS URL Scheme (October 1997)
2050 TCP RFC3103 RSIP Protocol Specification (October 2001)
2050 UDP RFC3103 RSIP Protocol Specification (October 2001)
2065 TCP RFC2166 APPN Implementer's Workshop (June 1997)
2067 TCP RFC2166 APPN Implementer's Workshop (June 1997)
2110 TCP RFC3018 Unified Memory Space Protocol (December 2000)
3017 TCP RFC3022 Traditional NAT (January 2001)
4321 UDP RFC2167 RWhois Protocol (June 1997)
4321 TCP RFC2167 RWhois Protocol (June 1997)
4827 TCP RFC2756 Hyper Text Caching Protocol (HTCP/0.0) (January 2000)
4827 UDP RFC2756 Hyper Text Caching Protocol (HTCP/0.0) (January 2000)
5060 TCP RFC2543 SIP: Session Initiation Protocol (March 1999)
5060 TCP RFC3219 Telephony Routing over IP (TRIP) (January 2002)
5150 UDP RFC2107 ATMP (February 1997)
6000 TCP RFC3027 Protocol Complications with NAT (January 2001)
9100 TCP RFC1759 Printer MIB (March 1995)
9875 TCP  RFC2974 Session Announcement Protocol (October 2000)