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The city of Cold Spring Harbor is in the state of New York. It has the following active area codes:
| NPA | NXX | Usage | Company Name | NXX Introduced Date |
|---|---|---|---|---|
| 516 | 217 | Landline | Broadvox-clec, Llc - Ny | 08/01/2013 |
| 516 | 224 | Landline | Xo New York, Inc. | 02/04/1994 |
| 516 | 283 | Landline | Allegiance Telecom, Inc. - Ny | 02/04/1994 |
| 516 | 340 | Landline | Bandwidth.com Clec, Llc - Ny | 09/17/2010 |
| 516 | 367 | Landline | Verizon New York Inc. | 11/11/2003 |
| 631 | 367 | Landline | Verizon New York Inc. | 01/14/2000 |
| 516 | 380 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 01/10/1996 |
| 516 | 381 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 09/11/1994 |
| 516 | 383 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 02/04/1994 |
| 516 | 397 | Wireless | Usa Mobility Wireless, Inc. | 09/11/1994 |
| 516 | 422 | Landline | Verizon New York Inc. | 11/11/2003 |
| 516 | 438 | Wireless | Aat Paging Corporation Ii | 02/04/1994 |
| 516 | 443 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 02/04/1994 |
| 516 | 446 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 09/11/1994 |
| 516 | 449 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 02/11/1995 |
| 516 | 480 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 07/22/1999 |
| 631 | 498 | Landline | Broadview Networks, Inc. - Ny | 10/31/2000 |
| 516 | 527 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 02/04/1994 |
| 631 | 534 | Landline | Allegiance Telecom, Inc. - Ny | 08/20/2000 |
| 516 | 556 | Wireless | Aat Paging Corporation Ii | 09/05/2001 |
| 516 | 617 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 10/13/1999 |
| 516 | 635 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 07/04/1995 |
| 516 | 658 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 02/04/1994 |
| 631 | 659 | Landline | Cablevision Lightpath, Inc. - Ny | 03/03/2001 |
| 631 | 692 | Landline | Verizon New York Inc. | 01/14/2000 |
| 516 | 692 | Landline | Verizon New York Inc. | 11/11/2003 |
| 516 | 702 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 07/06/1997 |
| 516 | 736 | Wireless | Cellco Partnership Dba Verizon Wireless - Ny | 08/19/2015 |
| 516 | 768 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 01/11/1997 |
| 516 | 769 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 01/11/1997 |
| 516 | 818 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 05/18/1998 |
| 516 | 819 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 07/06/1997 |
| 516 | 848 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 07/04/1995 |
| 631 | 857 | Landline | Xo New York, Inc. | 08/20/2000 |
| 516 | 885 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 10/11/1997 |
| 516 | 901 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 10/11/1997 |
| 516 | 948 | Wireless | Usa Mobility Wireless, Inc. | 07/04/1995 |
| 516 | 971 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 07/01/1996 |
| 516 | 982 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 07/01/1996 |
| 516 | 994 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 01/14/2000 |
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