With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
natAddrMapEntryType
nat Addr Map Entry Type
1.3.6.1.2.1.123.1.4.1.3
This parameter can be used to set up static or dynamic address maps.
Back to NAT-MIB MIB page.
IPHost Network monitor allows you to monitor natAddrMapEntryType on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco firewalls right now.