1738 Routes
- Oslo Minnesota -> Eagle Bend Minnesota
- Oslo Minnesota -> Mitchell Indiana
- Oslo Minnesota -> Owatonna Minnesota
- Oslund Minnesota -> Corgleton Kentucky
- Oslund Minnesota -> Hebbardsville Kentucky
- Oslund Minnesota -> Hoschton Georgia
- Oslund Minnesota -> Mountain View Oklahoma
- Osman Wisconsin -> Flora Vista New Mexico
- Osmond Nebraska -> Broadalbin New York
- Osmond Nebraska -> Nevada City California
- Osnabrock North Dakota -> Cuzick
- Osnabrock North Dakota -> Dutton Michigan
- Osseo Michigan -> Laurium Michigan
- Osseo Wisconsin -> Kenefick Texas
- Ossian Indiana -> Marianna Municipal A/p Florida
- Ossian Indiana -> Wagon Mound New Mexico
- Ossian Iowa -> Cove Texas
- Ossineke Michigan -> Carney Michigan
- Ossining New York -> East Quogue New York
- Ossining New York -> White Hall Illinois
- Ossipee New Hampshire -> Curlew Iowa
- Osterburg Pennsylvania -> London Texas
- Osterburg Pennsylvania -> Sun City West Arizona
- Osterdock Iowa -> Geneva Iowa
- Osterdock Iowa -> Prairieburg Iowa
- Ostrander Ohio -> Fairchild Wisconsin
- Ostrander Ohio -> Sylvan Grove Kansas
- Oswayo Pennsylvania -> Fair Bluff North Carolina
- Oswayo Pennsylvania -> Latty Ohio
- Oswayo Pennsylvania -> Vona Colorado
- Oswegatchie New York -> Dorchester Georgia
- Oswegatchie New York -> Ruff Virginia
- Oswegatchie Nueva York -> Canton Nueva York
- Oswego Nueva York 13126 -> Baldwinsville Nueva York 13027
- Oswego Nueva York 13126 -> Cleveland Ohio
- Oswego Illinois -> Cronanville Tennesse
- Oswego Kansas -> Burgaw North Carolina
- Oswego New York -> Alfred New York
- Oswego New York -> Leavitt Meadows California
- Oswego South Carolina -> Keystone California
- Oswego South Carolina -> Maidens Virginia
- Oswego South Carolina -> Rosemont Maryland
- Oswego South Carolina -> Waucoma Iowa
- Osyka Mississippi -> Boyd Minnesota
- Osyka Mississippi -> Harlem New York
- Osyka Mississippi -> Stanley Louisiana
- Otego New York -> Bynum Alabama
- Otero Mesa New Mexico -> Markham Minnesota
- Otero Mesa New Mexico -> Osseo Minnesota
- Othello Washington 99344 -> Toledo Washington 98591
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