Amerika

• AT&T Paradyne

• Southwestern Bell Company

Asien

• Archtek Telecom Corp.
• Globe Telecom Inc.
• Nippon Telegraph and Telephone

• Philippine Long Distance Telephone Corp.
• Smart Communications Inc.

Europa

• 01051 Telecom
• 3U Telekommunikation
• D2
• debiTel
• Deutsche Telekom AG
• E-Plus Mobilfunk GmbH
• Ericsson Telecom
• EurExcel
• EWE Tel
• First Telecom
• GTS Germany
• ISIS Multimedia Net
• Interroute Telecom Deutschland GmbH

• KomTel
• Mannesmann Arcor AG & Co.
• Mobilcom
• Netcologne
• PLUSNET Gesellschaft für Netzwerk-Services
• Talkline PS Phone Services GmbH
• Telecom Bretagne
• Tele Danmark Internet GmbH
• Tele 2
• Telekom Austria AG
• Tele Passport Service GmbH
• tesion
• VIAG INTERKOM GmbH & Co.

• GTE

• Telematrix Communications Corp.