NSAPPTR Network Service Access Point pointer (NSAP-PTR) record. The function of the NSAP-PTR record is similar to that of ...

NSAPPTR Network Service Access Point pointer (NSAP-PTR) record. The function of the NSAP-PTR record is similar to that of the standard DNS pointer (PTR) resource record used for IP addresses. NSAP-PTR records are an experimental record type used in DNS to provide reverse lookup of NSAP address numbers to text-based DNS names. This record type may be obsolete for later DNS implementations, which support the use of standard pointer (PTR) records as described in RFC 1706 to provide this same functionality. (RFC 1348)