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| Raw Number | 203423 |
| Basic Format | 203-423 |
| NPA (Area Code) | 203 |
| NXX | 423 |
| NPA-NXX-X | OCN | Company | Rate Center | Use Type | Assign Date | City | State | Region | Block Effective Date |
|---|---|---|---|---|---|---|---|---|---|
| 203-423-0XXX | 4800 | LEVEL 3 COMMUNICATIONS, LLC - CT | WILTON | AS | 12/08/2005 | WILTON | CT | NE | 01/02/2006 |
| 203-423-1XXX | 4950 | CABLEVISION LIGHTPATH, INC. - CT | WILTON | AS | 08/03/2007 | WILTON | CT | NE | 08/31/2007 |
| 203-423-2XXX | 7230 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | WILTON | AS | 05/29/2003 | WILTON | CT | NE | 06/18/2003 |
| 203-423-3XXX | 199F | BANDWIDTH.COM CLEC, LLC - CT | WILTON | AS | 01/29/2010 | WILTON | CT | NE | 02/28/2010 |
| 203-423-4XXX | 7143 | TELEPORT COMMUNICATIONS AMERICA, LLC - CT | WILTON | RT | WILTON | CT | NE | ||
| 203-423-5XXX | 4800 | LEVEL 3 COMMUNICATIONS, LLC - CT | WILTON | AS | 11/01/2010 | WILTON | CT | NE | 11/23/2010 |
| 203-423-6XXX | 7143 | TELEPORT COMMUNICATIONS AMERICA, LLC - CT | WILTON | RT | WILTON | CT | NE | ||
| 203-423-7XXX | 7143 | TELEPORT COMMUNICATIONS AMERICA, LLC - CT | WILTON | RT | WILTON | CT | NE | ||
| 203-423-8XXX | 7230 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | WILTON | AS | 08/22/2012 | WILTON | CT | NE | 09/04/2012 |
| 203-423-9XXX | 5562 | METROPCS, INC. | WILTON | AS | 11/25/2002 | WILTON | CT | NE | 12/23/2002 |
| 203-423-XXXX | 7143 | TELEPORT COMMUNICATIONS AMERICA, LLC - CT | WILTON | AS | WILTON | CT |
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