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Telstra Corporation Limited (Telstra)

Singtel Optus Proprietary Limited (Optus)

Vodafone Hutchison Australia Proprietary Limited (Vodafone)

Department of Defence

Vodafone Hutchison Australia Proprietary Limited (3)

Vodafone Network Pty. Ltd. (Vodafone)

One.Tel Limited One (Tel)

Norfolk Telecom Norfolk (Is)

Telstra Corporation Ltd. (Telstra)

Vodafone Hutchison Australia Proprietary Limited (3)

Railcorp, Transport for New South Wales (RailCorp)

TPG Telecom (AAPT)

Victorian Rail Track (VicTrack)

Optus

Pactel International Pty Ltd (Pactel)

Lycamobile Pty Ltd (Lycamobile)

Ausgrid Corporation

Queensland Rail Limited

iiNet Ltd

Challenge Networks Pty Ltd

Advanced Communications Technologies Pty. Ltd.

Pilbara Iron Company Services Pty Ltd

Dialogue Communications Pty. Ltd.

Nexium Telecommunications

RCOM International Pty Ltd

Compatel Limited

BHP Billiton

Thales Australia

CLX Networks Pty Ltd

Santos Limited

MessageBird Pty Ltd

Optus Mobile Pty. Ltd. (Optus)

Yancoal Australia Ltd

Truphone Pty Ltd (Truphone)

Telstra Corporation Ltd. (Telstra)

CITIC Pacific Mining

Aqura Technologies Pty

Groote Eylandt Mining Company Pty Ltd (GEMCO)

Arrow Energy Pty Ltd

Roy Hill Iron Ore Pty Ltd

Clermont Coal Operations Pty Ltd

AngloGold Ashanti Australia Ltd

Woodside Energy Limited

Titan ICT Pty Ltd

Pivotel Group Pty Limited

Commtel Network Solutions Pty Ltd CommTel (NS)

National Broadband Network Co. (NBN)

National Broadband Network Co. (NBN)

Telstra Corporation Limited (Telstra)

Telstra Corporation Limited (Telstra)

Pivotel Group Pty Limited

Singtel Optus Proprietary Limited (Optus)

One.Tel One (Tel)