| Alfavox Sp. z o.o. |
| Algotech s.r.o. |
| Almoayed Telecom |
| Alpha Data L.L.C. |
| ARTELCOM |
| AS Vorguvara |
| AT&T |
| Avnet Technology Solutions |
| Bell Aliant |
| Beltel |
| Bezeq International |
| BT PLC |
| BTC/BSC |
| BUSINESS COMMUNICATIONS MANAGEMENT HELLAS |
| Business Connexion |
| Cable & Wireless |
| CCT |
| CMS IT-Consulting GmbH |
| Comptoir Electrotechnique Luxembourgeois Sàrl |
| Connect Communications Grp Ltd |
| Connectis AG |
| CTI Group |
| Cygate AB |
| Datapoint |
| Datentechnik Austria GmbH & CoKG |
| DECUNIFY |
| DeTeWe Communications GmbH |
| Digital-IP |
| Dimension Data Netherlands |
| Eircom |
| Eltel Networks A/S |
| ETK networks solution GmbH |
| Exchange Communications Limited |
| Faroese Telecom |
| Felix Telecom SRL |
| G3 Telecommunications PLC |
| Getronics Nederland B.V. |
| IBM |
| ICM |
| ICP Business Communications GmbH |
| Intrinsic Technology Ltd |
| IP Integration |
| IPnett AS |
| Jersey Telecom |
| Kapsch BusinessCom |
| Kcom Group PLC |
| KPN |
| METCO |
| MTS Allstream |
| NetDesign A/S |
| NextiraOne Schweiz GmbH |
| Pan Dacom Networking AG |
| Phoenix IT Services |
| Piemme Telecom SRL |
| Proximity Communications plc |
| Quentris GDF SUEZ |
| Relacom |
| Sabio |
| SaskTel |
| ScanSource Communications GmbH |
| Servo |
| SpNetworks Limited |
| Swisscom (Switzerland) Ltd |
| Taldor |
| TDC OY |
| TDC Sverige AB |
| Tele2 Integration Services |
| TeliaSonera Finland Oyj |
| TeliaSonera Sweden AB |
| Telindus-ISIT |
| Tetracom s.a.l. |
| T-Systems Iberia |
| Umoe IKT AS |
| Vodafone |
| Voice & Data Network AG |
| VoiceAccess |
| Vosko Communications B.V. |
| Westcon |