Swisscom
Swisscom (Switzerland) Ltd.
IP-Plus engineering, Postfach, CH-3050, Bern, Switzerland
+41-58-221-98
BT Global Europe
BT Global Europe B.V. Magyarországi Fióktelepe, H-1117 Budapest, Budafoki út 91-93.
+36 1 777 0144
Romtelecom
Piata Presei Libere nr. 3-5, cladirea City Gate, Turn Nord, sector 1
n.a.