Perhaps you were looking for one of these?

• AGLF Knoxville & Holston River Railroad
• AKN AKN
• CKSI Carthage Knightstown and Shirley Railroad
• ITI Unknown
• KKRR Knox and Kane Railroad Company
• KNA KNA
• KNIG KNIG
• KNR KNR
• KNTZ KNTZ
• KNWC KNWC
• KXHR Knoxville & Holston River RR
• LXOH Knoxville & Holston River Railroad
• MKCX Morrison Knudsen Corporation
• MKIX Morrison-Knudsen
• MSDR Knoxville & Holston River Railroad
• NKN NKN
• OKN OKN
• RKCX Knox Kershaw Incorporated
• STLKNW STLKNW
• TKN TKN
• TKNU TKNU
• UNKN UNKN
• UNKNOWN UNKNOWN