 TelCan International
 - Callback services offered around the world.- International Telcom Ltd.
- International telephone call back and data transmission services.
- Callback 4 U Communications
- Offers calling cards and international callback services.
- Yes-Tel Communications
- Specializes in international call back, providing you a service to call anywhere from anywhere in the world utilizing the U.S. telephone system.
- Affinity Telecom International
- Communications broker offering domestic and international calling, callback, pre-paid callback, and calling cards.
- Call Concepts Corporation
- Provider of seamless callback for companies and hotels overseas.
- United World Telecom
- Provider of discounted international telecommunications including callback, direct dial in Europe, and Internet telephony.
- 1-800 FREE International Phone Calls
- Offers pre-paid phone cards, international calls with toll-free access, and call back services.
- Kreatel Communications
- Call control equipment.
- GlobalTel
- Specializing in international callback and direct access for voice and data.
- World Wide CallBack, Inc.
- Offers worldwide call back telephony with automated setup.
- #1 International Callback Service
- Offers callback services for savings on international calls.
- Nighthawk Telecom
- Discount telephone service, personal & private accounts, business accounts with credit limits, no telephone card access charges call-back from any location, credit cards accepted.
- CogniDial
- Offers toll-free dial-around, international call back, and nationwide calling card services.
- Tel Call
- International marketing company offering call back services.
- CJ Tech
- Offers electronic devices for your own call back and call forwarding service.
- Dharmatel Telecom Services
- Providing direct phonecalls and callback services.
- Get Hooked Up
- VoiceMasters
- Providing international callback and pre-paid calling card platforms.
- GlobalCom International
- Telecommunications service for corporate and individual users, GlobalCom specializes in call back, debit/travel card, Internet and private network services.
- ATLEX Communications
- Offers international callback services (in English and Russian).
- Trilogy Telemanagement, LLC
- International call back initiated via the web: make calls, moderate conference calls, review rates and account history online.
- Global Communication
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