Valve Corporation
10400 NE 4th St., Ste 1400, Bellevue, WA 98004
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Opennet
Opennetworks Kft.
Budapest, Fehérvári út 50-52, 1117
(06 1) 999 6000
Swisscom
Swisscom (Switzerland) Ltd.
IP-Plus engineering, Postfach, CH-3050, Bern, Switzerland
+41-58-221-98