Matches in DBpedia 2014 for { ?s <http://dbpedia.org/property/r2Number> ?o. }
- Niigata_Airport r2Number "10".
- Ninoy_Aquino_International_Airport r2Number "13".
- Nipawin_Airport r2Number "12".
- Nizhny_Novgorod_International_Airport r2Number "15".
- Niš_Constantine_the_Great_Airport r2Number "11".
- Noi_Bai_International_Airport r2Number "11".
- Nome_Airport r2Number "3".
- Norfolk_International_Airport r2Number "14".
- Norfolk_Island_Airport r2Number "4".
- Norfolk_Regional_Airport r2Number "14".
- Norseman_Airport r2Number "4".
- North_Auxiliary_Airfield r2Number "5".
- Hamlin_Airport r2Number "11".
- North_Battleford_Airport r2Number "12".
- Jack_Garland_Airport r2Number "18".
- North_Central_State_Airport r2Number "15".
- North_Las_Vegas_Airport r2Number "12".
- North_Little_Rock_Municipal_Airport r2Number "17".
- North_Palm_Beach_County_General_Aviation_Airport r2Number "8".
- North_Perry_Airport r2Number "10".
- North_Platte_Regional_Airport r2Number "17".
- North_Ronaldsay_Airport r2Number "10".
- North_Shore_Aerodrome r2Number "9".
- North_Texas_Regional_Airport r2Number "17".
- North_Weald_Airfield r2Number "13".
- Northeast_Alabama_Regional_Airport r2Number "18".
- Northeast_Florida_Regional_Airport r2Number "6".
- Northeast_Iowa_Regional_Airport r2Number "4".
- Northeast_Philadelphia_Airport r2Number "15".
- Northern_Maine_Regional_Airport_at_Presque_Isle r2Number "10".
- Northrepps_Aerodrome r2Number "4".
- Northwest_Alabama_Regional_Airport r2Number "18".
- Northwest_Arkansas_Regional_Airport r2Number "17".
- Northwest_Florida_Regional_Airport r2Number "1".
- Northwest_Regional_Airport_(British_Columbia) r2Number "15".
- Norwood_Memorial_Airport r2Number "17".
- Nottingham_Airport r2Number "3".
- Noumérat_–_Moufdi_Zakaria_Airport r2Number "18".
- Nowata_Municipal_Airport r2Number "5".
- Nueva_Hesperides_International_Airport r2Number "13".
- Nueve_de_Julio_Airport r2Number "18".
- Nuevo_Casas_Grandes_Municipal_Airport r2Number "14".
- Nukus_Airport r2Number "7".
- Nunapitchuk_Airport r2Number "NE/SW".
- Nyngan_Airport r2Number "18".
- Nyíregyháza_Airport r2Number "18".
- O'Hare_International_Airport r2Number "4".
- O'Neal_Airport r2Number "14".
- O._R._Tambo_International_Airport r2Number "3".
- Oakes_Municipal_Airport r2Number "17".
- Oakey_Army_Aviation_Centre r2Number "9".
- Oakland_County_International_Airport r2Number "9".
- Oakland_International_Airport r2Number "10".
- Oamaru_Airport r2Number "11".
- Ocala_International_Airport r2Number "8".
- Ocean_Cay_Airport r2Number "17".
- Ocean_City_Municipal_Airport_(Maryland) r2Number "14".
- Ocotillo_Airport r2Number "9".
- Strawberry_Lakes_Aerodrome r2Number "17".
- Odessa_International_Airport r2Number "16".
- Oerlinghausen_Airfield r2Number "4".
- Ogden-Hinckley_Airport r2Number "16".
- Ohio_State_University_Airport r2Number "9".
- Ohkay_Owingeh_Airport r2Number "6".
- Okeechobee_County_Airport r2Number "14".
- Olavarría_Airport r2Number "13".
- Olcott-Newfane_Airport r2Number "6".
- Old_Buckenham_Airport r2Number "7".
- Old_Town_Municipal_Airport_and_Seaplane_Base r2Number "12".
- Olds-Didsbury_Airport r2Number "10".
- Olds_(Netook)_Airport r2Number "14".
- Olympia_Regional_Airport r2Number "17".
- Omaka_Aerodrome r2Number "7".
- Omidiyeh_Air_Base r2Number "12".
- Omsk_Tsentralny_Airport r2Number "7".
- Ondangwa_Airport r2Number "16".
- Oneida_County_Airport r2Number "15".
- Onslow_Airport r2Number "12".
- Ontario_International_Airport r2Number "8".
- Oodnadatta_Airport r2Number "13".
- Opa-locka_Executive_Airport r2Number "9".
- Opa-locka_West_Airport r2Number "18".
- Oral_Ak_Zhol_Airport r2Number "4".
- Oran_Es_Sénia_Airport r2Number "7".
- Orange_Airport r2Number "4".
- Orange_County_Airport_(New_York) r2Number "8".
- Orange_County_Airport_(Texas) r2Number "13".
- Orange_Municipal_Airport r2Number "14".
- Orangeburg_Municipal_Airport r2Number "5".
- Orillia_Airport r2Number "12".
- Oripää_Airfield r2Number "14".
- Orlando_Executive_Airport r2Number "13".
- Orlando_International_Airport r2Number "17".
- Orlando_Sanford_International_Airport r2Number "9".
- Orly_Air_Base r2Number "7".
- Orly_Airport r2Number "6".
- Orléans_–_Bricy_Air_Base r2Number "2".
- Orléans_–_Saint-Denis-de-l'Hôtel_Airport r2Number "5".
- Ormond_Beach_Municipal_Airport r2Number "17".
- Oroville_Municipal_Airport r2Number "12".