All assignees
649 prefixes in 571 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 571-500 | HERNDON | 138E | 2018-08-28 | Yes |
| 571-501 | WSNGTNZN17 | 4036 | 2009-03-09 | Yes |
| 571-502 | WSNGTNZN17 | 4036 | 2009-03-09 | Yes |
| 571-503 | OCCOQUAN | 138E | 2021-01-14 | Yes |
| 571-504 | ENGLESIDE | 965H | 2021-08-10 | Yes |
| 571-505 | WSNGTNZN17 | 4036 | 2009-03-09 | Yes |
| 571-506 | WSNGTNZN08 | 9213 | 2021-03-08 | Yes |
| 571-507 | WSNGTNZN17 | 7529 | 2021-04-27 | Yes |
| 571-508 | HERNDON | 6855 | 2018-01-11 | Yes |
| 571-509 | LEESBURG | 4036 | 2017-08-14 | Yes |
| 571-510 | LEESBURG | 508J | 2014-04-10 | Yes |
| 571-511 | XXXXXXXXXX | MULT | — | — |
| 571-512 | WSNGTNZN19 | 6827 | 2011-04-08 | Yes |
| 571-513 | DALE CITY | 4036 | 2021-01-14 | Yes |
| 571-514 | HERNDON | 829J | — | Yes |
| 571-515 | ENGLESIDE | 7229 | 2017-08-11 | Yes |
| 571-516 | TRIANGLE | 6855 | 2021-10-27 | Yes |
| 571-517 | DULLES | 138E | 2020-05-18 | Yes |
| 571-518 | MANASSAS | 6855 | 2021-08-12 | Yes |
| 571-519 | HERNDON | 6855 | 2020-12-07 | Yes |
| 571-520 | HERNDON | 138E | 2020-05-11 | Yes |
| 571-521 | HERNDON | 829J | — | Yes |
| 571-522 | BRADDOCK | 9213 | — | Yes |
| 571-523 | HERNDON | 6855 | 2018-06-11 | Yes |
| 571-524 | HERNDON | 4036 | 2014-11-13 | Yes |
| 571-525 | HERNDON | 726H | 2015-09-22 | Yes |
| 571-526 | HERNDON | 138E | — | Yes |
| 571-527 | WSNGTNZN08 | 318J | 2005-01-03 | Yes |
| 571-528 | LEESBURG | 6827 | 2010-10-18 | Yes |
| 571-529 | WSNGTNZN19 | 6827 | 2008-05-13 | Yes |
| 571-530 | WSNGTNZN19 | 6855 | 2021-09-15 | Yes |
| 571-531 | WSNGTNZN17 | 6827 | 2021-02-10 | Yes |
| 571-532 | MANASSAS | 6855 | 2020-12-07 | Yes |
| 571-533 | WSNGTNZN17 | 7229 | 2010-12-21 | Yes |
| 571-534 | OCCOQUAN | 6855 | 2021-09-15 | Yes |
| 571-535 | MANASSAS | 4036 | 2011-02-03 | Yes |
| 571-536 | WSNGTNZN19 | 5832 | 2019-03-11 | Yes |
| 571-537 | HERNDON | 7229 | 2019-11-06 | Yes |
| 571-538 | MANASSAS | 6855 | 2022-01-14 | Yes |
| 571-539 | HERNDON | 7229 | 2019-11-06 | Yes |
| 571-540 | WSNGTNZN17 | 6827 | 2024-04-05 | Yes |
| 571-541 | LEESBURG | 4036 | 2021-08-16 | Yes |
| 571-542 | DALE CITY | 318J | 2011-04-12 | Yes |
| 571-543 | DALE CITY | 079F | 2022-01-10 | Yes |
| 571-544 | WSNGTNZN19 | 965H | 2020-07-10 | Yes |
| 571-545 | WSNGTNZN17 | 6855 | 2021-09-27 | Yes |
| 571-546 | WSNGTNZN19 | 6855 | 2023-08-09 | Yes |
| 571-547 | WSNGTNZN08 | 6855 | 2022-02-16 | Yes |
| 571-548 | HERNDON | 6827 | 2022-03-22 | Yes |
| 571-549 | BRADDOCK | 138E | 2016-05-09 | Yes |
| 571-550 | WSNGTNZN17 | 6827 | 2012-11-16 | Yes |
| 571-551 | WSNGTNZN08 | 7229 | 2013-05-16 | Yes |
| 571-552 | DALE CITY | 5562 | 2015-11-18 | Yes |
| 571-553 | LEESBURG | 829J | 2011-05-25 | Yes |
| 571-554 | DALE CITY | 6855 | 2019-11-20 | Yes |
| 571-555 | DIR ASST | MULT | — | — |
| 571-556 | BRADDOCK | 138E | 2020-10-15 | Yes |
| 571-557 | WSNGTNZN08 | 7229 | — | Yes |
| 571-558 | WSNGTNZN08 | 7229 | — | Yes |
| 571-559 | ENGLESIDE | 079F | 2019-02-14 | Yes |
| 571-560 | WSNGTNZN08 | 079F | 2022-07-22 | Yes |
| 571-561 | HAYMARKET | 138E | 2021-01-14 | Yes |
| 571-562 | WSNGTNZN17 | 6827 | 2022-07-22 | Yes |
| 571-563 | HERNDON | 624H | 2022-08-12 | Yes |
| 571-564 | WSNGTNZN19 | 6855 | 2022-09-02 | Yes |
| 571-565 | WSNGTNZN17 | 6827 | 2015-09-22 | Yes |
| 571-566 | WSNGTNZN19 | 7529 | 2020-12-24 | Yes |
| 571-567 | WSNGTNZN19 | 965H | 2021-08-26 | Yes |
| 571-568 | MANASSAS | 138E | 2020-11-10 | Yes |
| 571-569 | MANASSAS | 079F | 2022-08-16 | Yes |
| 571-570 | WSNGTNZN17 | 138E | 2015-03-13 | Yes |
| 571-571 | LEESBURG | 616J | 2025-01-06 | Yes |
| 571-572 | OCCOQUAN | 4036 | 2009-03-24 | Yes |
| 571-573 | NOKESVILLE | 624H | 2021-04-26 | Yes |
| 571-574 | WSNGTNZN17 | 624H | 2021-04-26 | Yes |
| 571-575 | OCCOQUAN | 4036 | 2009-08-07 | Yes |
| 571-576 | MANASSAS | 138E | 2021-08-03 | Yes |
| 571-577 | LEESBURG | 4036 | 2009-02-26 | Yes |
| 571-578 | LEESBURG | 5562 | 2022-03-31 | Yes |
| 571-579 | WSNGTNZN08 | 6855 | 2022-09-02 | Yes |
| 571-580 | OCCOQUAN | 6855 | 2022-09-02 | Yes |
| 571-581 | WSNGTNZN17 | 7229 | 2012-04-23 | Yes |
| 571-582 | LORTONMTRO | 138E | 2022-10-04 | Yes |
| 571-583 | BRADDOCK | 079F | 2022-10-21 | Yes |
| 571-584 | WSNGTNZN17 | 6855 | 2022-10-12 | Yes |
| 571-585 | WSNGTNZN19 | 4036 | 2014-11-06 | Yes |
| 571-586 | HERNDON | 138E | 2022-09-13 | Yes |
| 571-587 | WSNGTNZN19 | 6855 | 2021-12-07 | Yes |
| 571-588 | ENGLESIDE | 7229 | 2021-01-13 | Yes |
| 571-589 | DALE CITY | 5562 | 2014-10-24 | Yes |
| 571-590 | DALE CITY | 138E | 2022-11-04 | Yes |
| 571-591 | WSNGTNZN19 | 6855 | 2022-02-16 | Yes |
| 571-592 | OCCOQUAN | 939H | 2022-11-09 | Yes |
| 571-593 | LEESBURG | 939H | 2022-11-15 | Yes |
| 571-594 | WSNGTNZN17 | 6855 | — | Yes |
| 571-595 | WSNGTNZN19 | 4036 | 2018-03-07 | Yes |
| 571-596 | WSNGTNZN17 | 6827 | 2022-12-07 | Yes |
| 571-597 | HERNDON | 6855 | 2023-01-09 | Yes |
| 571-598 | MANASSAS | 6855 | 2014-09-12 | Yes |
| 571-599 | HERNDON | 6827 | 2014-08-12 | 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.