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Phone Directory 303-400 Detail
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Colorado
Denver
Mountain
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Area Code Prefixes
Prefix
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Introduced
303-400
Denver, CO
Qwest Corporation
Jefferson
Landline
11/20/1998
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Description
Other Series For Prefixes
3034000
Number Formats: 3034000 3034000 3034000 +13034000
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3034001
Number Formats: 3034001 3034001 3034001 +13034001
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3034002
Number Formats: 3034002 3034002 3034002 +13034002
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3034003
Number Formats: 3034003 3034003 3034003 +13034003
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3034004
Number Formats: 3034004 3034004 3034004 +13034004
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3034005
Number Formats: 3034005 3034005 3034005 +13034005
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3034006
Number Formats: 3034006 3034006 3034006 +13034006
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3034007
Number Formats: 3034007 3034007 3034007 +13034007
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3034008
Number Formats: 3034008 3034008 3034008 +13034008
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3034009
Number Formats: 3034009 3034009 3034009 +13034009
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