Costco Wholesale UK Ltd
- Hartspring Lane, WD25 8JS Watford
- +44 (1923) 213113
Ehrsam Grosshandel AG
- Christoph Merian-Ring 27, 4153 Reinach
- +41 (61) 70142-80
- +41 (61) 70145-35
Level 3 Communications GmbH
- Rüsselsheimer Straße 22, 60326 Frankfurt am Main
- +49 (69) 5060800-0
- +49 (69) 5060800-1
net-and-phone GmbH
- An der Palmweide 55, 44227 Dortmund
- +49 (231) 220197123
- +49 (231) 220197199
Ecotel Communication AG
- Prinzenallee 11, 40549 Düsseldorf
- +49 (211) 55007-0
- +49 (211) 55007-222