1. Amdocs Limited
2. AT&T Inc.
3. British Telecommunications PLC
4. BT Global Services Ltd.
5. CenturyLink Inc.
6. China Telecom Corporation Limited
7. Cisco Systems Inc.
8. Cogent Communications Holdings Inc.
9. Colt Technology Services Group Ltd.
10. Comcast Corporation
11. Consolidated Communications Inc.
12. Deutsche Telekom AG
13. FiberLight
LLC
14. Liberty Global
15. Lumos Networks Corp.
16. MetroNet Inc.
17. Netcracker Technology Corporation
18. NTT Communications Corporation
19. Orange S.A.
20. Tata Communications Ltd.
21. Telefonaktiebolaget LM Ericsson
22. Telstra Corporation Limited
23. Verizon Communications Inc.
24. Windstream Holdings Inc.
25. Zayo Group Holdings Inc.