| Compagnia ferroviaria |
Logo & collegamento |
A-Train  |
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Aare Seeland mobil AG  |
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| Aargau Verkehr AG (AVA) |
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Abellio  |
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| Aberdeen and Rockfish Railroad (AR) |
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| Aberdeen, Carolina and Western Railway (ACWR) |
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Abukuma Express  |
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Achenseebahn AG  |
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Administración de Ferrocarriles del Estado (AFE)  |
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| Adrian and Blissfield Rail Road (ADBF) |
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| Aichi Loop Railway |
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| Ainokaze Toyama Railway |
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Airtrain Citylink  |
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| Aizu Railway |
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| Akechi Railway |
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| Akita Nairiku Jukan Tetsudo |
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| AKN Eisenbahn AG |
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| Alaska Railroad |
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| Albtal-Verkehrs-Gesellschaft |
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| Alpico Group |
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| Altamont Corridor Express |
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| Amagi Railway |
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| AMTRAK (AMerican TRAcK ) |
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| Anhaltische Bahn Gesellschaft mbH |
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| Aomori Railway |
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| Appenzeller Bahnen AG (AB) |
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ARA (Afghanistan Railway Authority)  |
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Arenaways (stop 2011)  |
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AREX (Airport Railroad EXpress)  |
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Arlanda Express  |
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Arriva Personenvervoer Nederland BV  |
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Arriva RP Sp zoo  |
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| Arriva Tåg AB |
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Arriva Tog A/S  |
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Arriva Transport Česká Republika  |
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| Arst Gestione FdS Srl (FdS) |
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| Asa Seaside Railway Corp |
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Astra Trans Carpatic  |
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Aukštaitijos siaurasis geležinkelis  |
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Avanti West Coast  |
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Azerbaijan Demir Yollari QSC  |
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