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40 prefixes in 571 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 571-262 | HERNDON | 7229 | 2002-03-18 | Yes |
| 571-266 | HERNDON | 7229 | 2008-05-29 | Yes |
| 571-293 | LEESBURG | 7229 | 2009-05-12 | Yes |
| 571-324 | HERNDON | 7229 | 2017-07-31 | Yes |
| 571-325 | HERNDON | 7229 | 2013-12-13 | Yes |
| 571-326 | WSNGTNZN17 | 7229 | 2013-01-21 | Yes |
| 571-361 | MANASSAS | 7229 | 2017-08-02 | Yes |
| 571-362 | HERNDON | 7229 | 2017-09-18 | Yes |
| 571-375 | HERNDON | 7229 | 2012-06-13 | Yes |
| 571-382 | WSNGTNZN17 | 7229 | — | Yes |
| 571-383 | MANASSAS | 7229 | 2011-08-22 | Yes |
| 571-386 | WSNGTNZN19 | 7229 | 2012-11-20 | Yes |
| 571-387 | HERNDON | 7229 | 2018-06-01 | Yes |
| 571-392 | HERNDON | 7229 | 2011-09-12 | Yes |
| 571-401 | HERNDON | 7229 | 2018-11-15 | Yes |
| 571-414 | WSNGTNZN08 | 7229 | 2012-08-29 | Yes |
| 571-417 | LEESBURG | 7229 | 2018-02-06 | Yes |
| 571-448 | ENGLESIDE | 7229 | — | Yes |
| 571-454 | MANASSAS | 7229 | 2019-08-27 | Yes |
| 571-472 | WSNGTNZN17 | 7229 | 2015-09-17 | Yes |
| 571-487 | ARCOLA | 7229 | 2019-07-09 | Yes |
| 571-515 | ENGLESIDE | 7229 | 2017-08-11 | Yes |
| 571-533 | WSNGTNZN17 | 7229 | 2010-12-21 | Yes |
| 571-537 | HERNDON | 7229 | 2019-11-06 | Yes |
| 571-539 | HERNDON | 7229 | 2019-11-06 | Yes |
| 571-551 | WSNGTNZN08 | 7229 | 2013-05-16 | Yes |
| 571-557 | WSNGTNZN08 | 7229 | — | Yes |
| 571-558 | WSNGTNZN08 | 7229 | — | Yes |
| 571-581 | WSNGTNZN17 | 7229 | 2012-04-23 | Yes |
| 571-588 | ENGLESIDE | 7229 | 2021-01-13 | Yes |
| 571-607 | WSNGTNZN08 | 7229 | 2023-01-19 | Yes |
| 571-608 | WSNGTNZN08 | 7229 | 2023-01-19 | Yes |
| 571-610 | WSNGTNZN08 | 7229 | 2023-01-19 | Yes |
| 571-613 | WSNGTNZN08 | 7229 | 2023-01-19 | Yes |
| 571-614 | WSNGTNZN08 | 7229 | 2023-01-19 | Yes |
| 571-616 | ENGLESIDE | 7229 | 2017-09-14 | Yes |
| 571-644 | ENGLESIDE | 7229 | 2021-01-15 | Yes |
| 571-665 | HERNDON | 7229 | 2015-03-10 | Yes |
| 571-767 | ENGLESIDE | 7229 | 2016-10-27 | Yes |
| 571-858 | WSNGTNZN08 | 7229 | 2010-11-24 | Yes |
These are initial assignees from NANPA CO-code records — because of number portability, the current serving carrier of individual numbers may differ. Bulk export requires a membership.