Call signs for period 1915-1923 are:

KVF - SS Iroquois
WCA - SS Juniata
WCD - SS Octorarian
WCN - SS Northland
WCS - SS Alpena
WDA - SS Pere Marquette
WDH - SS Petosky
WDS - SS City of Grand Rapids
WED - SS Western States (WTCA)
WEE - SS Eastern States
WEF - SS City of Detroit III
WEN - SS North American
WFB - SS Alabama
WFC - SS Indiana
WFH - SS Virginia
WFN - SS Eastland (Later assigned to WFN Louisville/Jeffersonville.)
WFR - SS State of Ohio
WFS - SS Seeandbee (WTCT)  (WWII - USS Wolverine)
WFW - SS Manitou
WFX - SS Missouri
WLE - SS Maitland
WNX - SS Peter Reiss
WPB - SS William Atwater (WDDL)

Land Stations  1915-23
WAM - Buffalo
WBL - Buffalo (This is probably the oldest of the stations that later operated on AM and SSB.)
WCM - Caumet (Later assigned to WCM Pittsburgh and Cincinnati.)
WCX - Clevelent
WDM - Duluth
WDR - Detroit
WFK - Frankfort, Mi
WGH - Grand Haven, MI
WGO - Chicago (top of Pick-Congress Hotel)
WHQ - Mackinac Island
WLD - Ludington
WMX - Manistique
WME - Milwaukee
WMW - Mantowoc, WI
WTK - Cleveland (top of Cleveland Hotel)

WMIO - SS W. H. Mc Gean

Canadian Shore Stations
VBA - Port Arthur, Ont
VBB - Sault Ste. Marie, Ont
VBC - Midland, Ont
VBD - Tobermoy, Ont
VBE - Port Edwards, Ont (Sarnia)
VBF - Toronto