XO Communications
- Providing services to businesses worldwide over its networks.
- http://www.xo.com/

Vtesse Networks
- Provides optical networking and related data services in the UK.
- http://www.vtesse.com/

Videotron Telecom
- Internet, data, and telephony services provider in Canada. [English/French]
- http://www.vtl.ca/

United Networks
- UK voice carrier offering TDM & IP based communications from their own facilities.
- http://www.unitednetworks.co.uk/

Uecomm Limited
- Provides broadband network services throughout Australia.
- http://www.uecomm.com.au

T-Systems North America
- Solutions for global corporations. Subsidiary of Deutsche Telekom AG. Headquarters in Illinois.
- http://www.t-systemsus.com/

Singapore Telecom
- Singapore based service provider with operations in 20 countries.
- http://www.singtel.com/

Reach
- Asia-Pacific focused backbone provider.
- http://www.reach.com

PanAmSat
- Bandwidth on demand and billing by the byte on an international ATM network managed end-to-end.
- http://www.panamsat.com/

Pakistan Telecommunication Company Limited
- Local, long distance, private circuits, based in Pakistan.
- http://www.ptcl.com.pk/

NTT Communications
- Japan-based global networking company.
- http://www.ntt.com/

NTT Cable
- Long-distance provider for small and medium-sized businesses. Serving Germany, England, Italy, and Poland.
- http://www.nttcable.com

MAC Telecom
- Provides businesses with high-speed data connections and voice services.
- http://www.mactelecom.com/

Light Technologies
- Competitive Australian provider.
- http://www.lighttechnologies.com.au

Level 3 Communications, Inc.
- Large network throughout the US and Europe. Voice / Data / Internet.
- http://www.level3.com/

KPNQwest N.V.
- Provides data-centric, IP-based services to businesses across Europe. (Nasdaq: KQIP).
- http://www.kpnqwest.com/

IDT Corporation
- Provides wholesale and retail long distance services. Site includes link to data subsidiary.
- http://www.idt.net

Global Crossing Ltd.
- Global integrated fiber optic network provider.
- http://www.globalcrossing.com/

Flag Telecom.
- Fiberoptic link around the globe.
- http://www.flagtelecom.com/

8el
- UK network operator providing corporate voice and data services. Service level agreements.
- http://www.8el.com

Dentel Netzwerk Telefonie
- German network operator, established in 1996.
- http://www.dentel.net

CPCNet
- Provides network-based communication services for Hong Kong, Taiwan, Japan, Singapore, China.
- http://www.cpcnet-hk.com/

Colt Telecommunications
- Fibre optic networks to deliver private wire, network interconnection, switched telephony and video in Europe.
- http://www.colt-telecom.com/

American Telesis
- Wholesale provider of private lines, dedicated internet and frame relay services to the resellers, agents and brokers. Network spans United States and Canada.
- http://www.american-telesis.net/