Can also call NWA's regular 800 number and use the automated system to check seat assignment...after which you can opt to talk to an agent if you don't obviously have one in First.

Relatedly, can someone let me know how to add in itineraries on NWA.com that were not purchased on the Website? I've searched in vain before to figure that out, hence my familiarity with the automated seat assignment review at their 800 number.;-)

TIA.