Perhaps you were looking for one of these?

• ACZX Norfolk Southern Railway Company
• CNTP Norfolk Southern (Cincinnati New Orleans and Texas Pacific R
• CRCZ Norfolk Southern Railway Company
• CRMU Norfolk Southern Railway Company
• CRMZ Norfolk Southern Railway Company
• CRN Norfolk Southern Railway Company
• CRPU Norfolk Southern Railway Company
• ENSU Norfolk Southern
• ENSZ Norfolk Southern Railway Company
• INT Norfolk Southern Railway Company
• NFD Norfolk, Franklin and Danville
• NPB Norfolk and Portsmouth Belt Line Railroad Company
• NPBL Norfolk and Portsmouth Belt Line
• NS Norfolk Southern
• NSCU Norfolk Southern Railway Company
• NSFZ Norfolk Southern Railway Company
• NSPZ Norfolk Southern Railway Company
• NSZ Norfolk Southern Railway Company
• NW Norfolk & Western
• NWZ Norfolk & Western
• SOUZ Norfolk Southern Railway Company
• TCSR Norfolk Southern Corporation
• ZNSU Norfolk Southern Corporation