...
| Adif | ES |
| Bane NOR | NO |
| Banedanmark | DK |
| BLS Netz AG | CH |
| CFR | RO |
| Coras Iompair Eireann CIE | IE |
| DB Netz | DE |
| Eesti Raudtee, AS | EE |
| Eurotunnel | |
| Győr-Sopron-Ebenfurti Vasút (GySEV) | HU |
| HŽ Infrastruktura d.o.o. | HR |
| Iarnród Éireann – Irish Rail | IE |
| Infrabel | BE |
| IP S.A. | PT |
| LatRailNet | LV |
| Latvijas dzelzceļš | LV |
| LISEA | FR |
| LTG Infra | LT |
| MÁV Zrt | HU |
| NRIC National Railway Infrastructure Companu | BG |
| ÖBB Infrastruktur AG | AT |
| OSE.SA - the Hellenic Railways Organisation | EL |
| PKP PLK | PL |
| ProRail | NL |
| Rete Ferroviaria Italiana | IT |
| SBB | CH |
| Slovenske železnice | SI |
| SNCF Réseau | FR |
| Société Nationale des Chemins de Fer Luxembourgeois (CFL) | LU |
| Správa železniční dopravní cestyželeznic | CZ |
| Technical Regulatory Body | EE |
| Trafikverket | SE |
| TVS | CH |
| Väylä, Finish Transport Infrastructure Agency | FI |
| VPE Vasúti Pályakapacitás-elosztó Kft. / VPE Rail Capacity Allocation Office Ltd. | HU |
| ZSR - Zeleznice Slovenskej republiky | SK |
| Øresundsbro Konsortiet | DK |
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