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- AboveNet (Formerly MetroMedia)
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- Advanced Telecom Group,Inc.
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- Bechtel Telecommunications
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- BerBee Information Network
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- BlackBox (Formerly NextiraOne)
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- Broken Arrow Communications
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- Embarq Logistic's
(Formerly Sprint North Supply)
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- Frontier Communications
(Formerly Citizens Communications)
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- Integra Telecom
(Formerly Electric Lightwave)
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- Level 3 Communications
(Formerly Looking Glass Networks)
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- LightCore
(Formerly Digital Teleport)
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- Parsons Telecommunications
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- Prime Service Group, Inc.
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- Qwest
(Formerly On Fiber Communications)
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- Shentel Converged Services, Inc.
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- TelePacific Communications
Formerly Mpower)
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- Verizon Business
(Formerly MCI)
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