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51IN
Dahnke Airport
51K
Cedar Air Park
51KS
Barnard Airport
51LS
Red Oak Landing Airport
51M
Oscoda County/Dennis Kauffman Memorial Airport
51ME
Beaver Creek Airport
51NC
Phillip R Bunn Airport
51NH
Blue Puffin Farm Heliport
51OK
Eagle Creek Airport
51PA
Lamberson Airport
51TE
Barstool Ranch Airport
51TN
Glendale Field
51TT
Hoes Ranch Airport
51TX
N D Ranch Airport
51VA
Skyview Airport
51WA
Evergreen Sky Ranch Airport
51WI
Gallinger Airport
51WT
Whiterik Field
52AZ
X Bar 1 Ranch Upper Headquarters Airport
52CL
Adelanto Airport
52CN
Ponderosa Sky Ranch Airport
52CO
Mountain View Ranch Airport
52FA
Bent Willies Airport
52FL
Lake Clinch Airpark
52I
Gross Airport
52IN
Higginbotham Field
52K
Charles E Grutzmacher Municipal Airport
52KS
Bland Airport
52KY
Air Castle Airport
52MN
Anderson Field
52NC
Epley Airport
52ND
Richtsmeier Airport
52NE
Svitak Airport
52NM
Timberon Airport
52NR
Derksen Airport
52NY
Bedson's Land Base Airport
52OA
Area 52 Airport
52OR
Chinook Ultralight Airpark
52PA
Wildcat Airport
52S
St Ignatius Airport
52TA
Red Wing Airport
52TS
Fall Creek Air Ranch STOLport
52U
Weatherby US Forest Service Airport
52WA
Honn Farm Airport
52WI
John's Field
52WT
Galt's Gulch Airport
52XA
Klinkerman Airport
52Y
Remer Municipal Airport
53AK
Lakewood Airstrip
53CL
Lofty Redwoods Airport