OID value: 1.3.6.1.2.1.4.20.1.1
OID description:
ipAdEntAddr OBJECT-TYPE SYNTAX IpAddress ACCESS read-only STATUS mandatory DESCRIPTION "The IP address to which this entry's addressing information pertains." ::= { ipAddrEntry 1 }
See also the OID Repository website reference for 1.3.6.1.2.1.4.20.1.1