riddlebox:~$ rfc -n ldap
Looking up service...
ldap              389/tcp    # Lightweight Directory Access Protocol
ldap              389/udp    # Lightweight Directory Access Protocol

riddlebox:~$ rfc -k ldap
The Result:
1558 A String Representation of LDAP Search Filters. T. Howes.
1823 The LDAP Application Program Interface. T. Howes, M. Smith.
1959 An LDAP URL Format. T. Howes & M. Smith. June 1996. (Format:
1960 A String Representation of LDAP Search Filters. T. Howes. June
2164 Use of an X.500/LDAP directory to support MIXER address mapping.
2247 Using Domains in LDAP/X.500 Distinguished Names. S. Kille, M.
2254 The String Representation of LDAP Search Filters. T. Howes.
2255 The LDAP URL Format. T. Howes, M. Smith. December 1997. (Format:
2256 A Summary of the X.500(96) User Schema for use with LDAPv3. M.
2307 An Approach for Using LDAP as a Network Information Service. L.
     LDAPv2. S. Boeyen, T. Howes, P. Richard. April 1999. (Format:
2587 Internet X.509 Public Key Infrastructure LDAPv2 Schema. S.
2596 Use of Language Codes in LDAP. M. Wahl, T. Howes. May 1999.
2649 An LDAP Control and Schema for Holding Operation Signatures. B.
2657 LDAPv2 Client vs. the Index Mesh. R. Hedberg. August 1999.

riddlebox:~$ rfc 1823
The Result:
1823 The LDAP Application Program Interface. T. Howes, M. Smith.
     August 1995. (Format: TXT=41081 bytes) (Status: INFORMATIONAL)

riddlebox:~$ rfc 2587
The Result:
2587 Internet X.509 Public Key Infrastructure LDAPv2 Schema. S.
     Boeyen, T. Howes, P. Richard. June 1999. (Format: TXT=15102 bytes)
     (Status: PROPOSED STANDARD)


riddlebox:~$ rfc -l 2307