first national bank of oklahoma fnbokla.bank Category:banking credit and lending Global Rank:1,167,841 visits:46.6K pages/Per:1.3 1nb.com since 1889, 1nb has sustained and advanced communities in southern oklahoma with our personal and business banking services. Category:financial planning and management Global Rank:3,049,304 visits:9.7K pages/Per:2.2 ADS