Landmark Bank, Sulphur Branch Basic Info Reviews Routing Numbers Map & Direction Name: Landmark Bank, Sulphur Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 2600 West Broadway Ste 2 Sulphur, Oklahoma 73086 Murray County View other branches Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer081500862YY081506837YN081513930YN103102384YN111917943YN From: To: