NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026
Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.
Most active assignees, all time — NPA 657
New assignments by month
Sep 2026
Aug 2026
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Jun 2026
May 2026
Apr 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2022-03-31 | 657-686-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | GARDEN GRV | CA |
| 2021-02-04 | 657-487-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SANTA ANA | CA |
| 2019-02-07 | 657-242-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | ANAHEIM | CA |
| 2019-01-31 | 657-357-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SANTA ANA | CA |
| 2018-08-29 | 657-276-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | ANAHEIM | CA |
| 2018-05-25 | 657-254-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | ANAHEIM | CA |
| 2017-07-24 | 657-314-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SILVERADO | CA |
| 2017-06-22 | 657-358-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SANTA ANA | CA |
| 2017-04-27 | 657-358-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SANTA ANA | CA |
| 2016-05-02 | 657-276-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | ANAHEIM | CA |
| 2016-03-07 | 657-304-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SANTA ANA | CA |
| 2015-12-17 | 657-295-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | ANAHEIM | CA |
| 2015-12-10 | 657-289-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SANTA ANA | CA |
| 2015-12-01 | 657-289-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SANTA ANA | CA |
| 2015-10-05 | 657-295-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | ANAHEIM | CA |
| 2015-08-06 | 657-284-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | ORANGE | CA |
| 2015-08-06 | 657-284-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | ORANGE | CA |
| 2015-07-29 | 657-276-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | ANAHEIM | CA |
| 2014-10-01 | 657-239-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | BUENA PARK | CA |
| 2014-09-26 | 657-227-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | WESTMINSTR | CA |
| 2014-09-26 | 657-238-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | CYPRESS | CA |
| 2014-09-26 | 657-251-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | GARDEN GRV | CA |
| 2014-08-05 | 657-230-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | ANAHEIM | CA |
| 2014-07-24 | 657-237-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | HUNTITNBCH | CA |
| 2014-07-23 | 657-242-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | ANAHEIM | CA |
| 2014-07-10 | 657-383-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SANTA ANA | CA |
| 2014-06-26 | 657-238-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | CYPRESS | CA |
| 2014-06-02 | 657-223-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | ORANGE | CA |
| 2014-05-07 | 657-237-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | HUNTITNBCH | CA |
| 2014-04-28 | 657-242-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | ANAHEIM | CA |
| 2014-04-04 | 657-220-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | ANAHEIM | CA |
| 2014-04-03 | 657-232-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SANTA ANA | CA |
| 2014-02-27 | 657-500-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | FULLERTON | CA |
| 2014-02-11 | 657-233-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | GARDEN GRV | CA |
| 2014-01-06 | 657-845-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | HUNTITNBCH | CA |
| 2013-11-27 | 657-223-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | ORANGE | CA |
| 2013-11-27 | 657-232-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SANTA ANA | CA |
| 2013-11-27 | 657-232-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SANTA ANA | CA |
| 2013-11-26 | 657-667-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | GARDEN GRV | CA |
| 2013-11-06 | 657-232-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SANTA ANA | CA |
| 2013-10-04 | 657-444-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | PLACENTIA | CA |
| 2013-09-25 | 657-223-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | ORANGE | CA |
| 2013-06-19 | 657-218-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SANTA ANA | CA |
| 2013-06-13 | 657-218-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SANTA ANA | CA |
| 2013-05-24 | 657-220-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | ANAHEIM | CA |
| 2013-05-24 | 657-220-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | ANAHEIM | CA |
| 2013-05-15 | 657-900-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SANTA ANA | CA |
| 2013-02-11 | 657-221-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | ORANGE | CA |
| 2013-01-16 | 657-900-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SANTA ANA | CA |
| 2012-11-08 | 657-201-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | ANAHEIM | CA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.