AT & T
2630 Liberty Ave, Pittsburgh, PA
(724) 471-4400
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AT & T
1 Route 18, Aliquippa, PA
(724) 773-0926
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American Telecom Corporation of PA
1007 8th Ave, Glenshaw, PA
(412) 486-8600
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Atlantic Business Comms Corporation
1001 8th Ave, Glenshaw, PA
(412) 492-2000
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Black Box Network Service
2104 Babcock Blvd, Pittsburgh, PA
(412) 821-5150
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Broadwing Communications
535 Smithfield St, Pittsburgh, PA
(412) 281-7663
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Chaney & Association
230 Highview Ave, Pittsburgh, PA
(412) 767-0307
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Compmanagement
600 N Bell Ave, Carnegie, PA
(412) 278-4585
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Corporate Cost Controls Incorporated
408 S Highlander Heights Dr, Glenshaw, PA
(412) 486-2620
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Corporate Cost Controls Incorporated
802 North Ave, Pittsburgh, PA
(412) 486-2620
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Covad Communications
651 Holiday Dr, Pittsburgh, PA
(412) 928-4682
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Crown Communications
2656 Idlewood Rd, Pittsburgh, PA
(412) 921-2990
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Crown Fiber Communications Incorporated
401 Mount Nebo Rd, Pittsburgh, PA
(724) 695-5311
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Decision One
130 Church Rd, Millvale, PA
(412) 633-4032
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Decision One
1707 Pennsylvania Ave, Pittsburgh, PA
(412) 633-4112
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Enterprise Telecom Solutions
168 40th St, Pittsburgh, PA
(412) 578-0123
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Enterprise Telecom Solutions
1812 Constitution Blvd, Valencia, PA
(412) 578-0200
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GTE Government Systems
1000 Liberty Ave, Pittsburgh, PA
(412) 434-0574
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Global Crossing
2 Penn Ctr W Ste 326, Pittsburgh, PA
(412) 788-4580
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Hodge Telecommunications Service
900 N Shore Dr, Pittsburgh, PA
(412) 321-3016
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I Gate Corporation
1000 Commerce Dr Ste 500, Pittsburgh, PA
(412) 506-1131
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Intermedia Communications Incorporated
1400 Penn Ave, Pittsburgh, PA
(412) 258-3140
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Level 3 Communications
200 Technology Dr, Pittsburgh, PA
(412) 681-9600
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Lucent Technologies Incorporated
5 Parkway Ctr, Pittsburgh, PA
(412) 875-4000
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Marconi Networks
5000 Marconi Dr, Warrendale, PA
(724) 742-4444
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McI
416 7th Ave, Pittsburgh, PA
(412) 209-7070
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McI
3170 Sassafras Way, Pittsburgh, PA
(412) 261-9378
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McI
1 Penn Ctr W Ste 420, Pittsburgh, PA
(412) 505-4124
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Mellon Financial Corporation
500 Grant St Ste 1000, Pittsburgh, PA
(412) 234-5000
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Miller Information Systems
1023 Main St, Sharpsburg, PA
(412) 781-6704
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North America Telecomms
6580 Frankstown Ave, Pittsburgh, PA
(412) 441-5912
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North Pittsburgh Systems Incorporated
4008 Gibsonia Rd, Gibsonia, PA
(724) 443-9600
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North Pittsburgh Telephone Company
4008 Gibsonia Rd, Gibsonia, PA
(724) 443-9600
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One Communications
650 Smithfield St, Pittsburgh, PA
(412) 201-2799
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Onecom Telecommunications
Po Box 44350, Pittsburgh, PA
(412) 937-1266
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Penn Telecom Incorporated
4006 Gibsonia Rd, Gibsonia, PA
(724) 443-9500
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Penn Telecom Incorporated
2710 Rochester Rd, Cranberry Twp, PA
(724) 778-9500
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Penn Telecom
44 Center Ave, West View, PA
(412) 459-0212
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Pittsburgh Supercomputing Center
4400 5th Ave, Pittsburgh, PA
(412) 268-4960
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Ronco Communications & Elect
403 Commerce Park Dr, Cranberry Twp, PA
(412) 367-1716
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Shakedown Productions
253 Mckee Pl, Pittsburgh, PA
(412) 683-2035
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Stargate Local Service
810 Parish St, Pittsburgh, PA
(412) 920-4882
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Telerama Public Access Intrnt
5001 Baum Blvd Ste 605, Pittsburgh, PA
(412) 688-3200
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Tollgrade Communications Incorporated
493 Nixon Rd, Cheswick, PA
(412) 820-1400
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Triad Telecom Incorporated
117 N Negley Ave, Pittsburgh, PA
(412) 345-5012
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Triad Telecom Incorporated
230 Lothrop St, Pittsburgh, PA
(412) 535-0317
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Triad Telecom Incorporated
4600 Baum Blvd, Pittsburgh, PA
(412) 535-0355
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Triad Telecom Incorporated
2000 Mary St, Pittsburgh, PA
(412) 535-0368
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Triad Telecom
3600 Forbes Ave, Pittsburgh, PA
(412) 535-0356
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Triad Telecom
3459 5th Ave, Pittsburgh, PA
(412) 535-0357
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US Lec of Pennsylvania Incorporated
750 Holiday Dr # 590, Pittsburgh, PA
(412) 250-1000
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Verizon Communications
715 Thomson Park Dr, Cranberry Twp, PA
(724) 742-1100
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Verizon
Po Box 12348, Pittsburgh, PA
(412) 472-3380
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Verizon
State Route 60, Pittsburgh, PA
(412) 633-4707
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Verizon
128 W Madison St # 1, Rochester, PA
(724) 774-0030
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Warner Telecommunications Incorporated
229 Yardley Way, Pittsburgh, PA
(412) 362-9000
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Williams Telecommunications
2800 Liberty Ave, Pittsburgh, PA
(412) 261-9378
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World Com National Accounts
1001 Liberty Ave, Pittsburgh, PA
(412) 391-3636
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Wqed Communications
4802 5th Ave, Pittsburgh, PA
(412) 622-1300
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Xo Communications LLC
1 Allegheny Center Mall, Pittsburgh, PA
(412) 321-3100
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