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 305
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
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Dec 2025
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2022-03-29 | 305-548-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | MIAMI | FL |
| 2017-08-17 | 305-847-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | HOMESTEAD | FL |
| 2015-12-16 | 305-363-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | KEYS | FL |
| 2015-05-28 | 305-859-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | MIAMI | FL |
| 2015-05-21 | 305-363-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | KEYS | FL |
| 2015-03-20 | 305-363-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | KEYS | FL |
| 2015-03-20 | 305-363-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | KEYS | FL |
| 2013-06-20 | 305-684-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | KEYS | FL |
| 2013-06-20 | 305-747-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | KEYS | FL |
| 2013-06-04 | 305-547-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | MIAMI | FL |
| 2013-06-04 | 305-547-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | MIAMI | FL |
| 2013-06-04 | 305-548-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | MIAMI | FL |
| 2013-02-28 | 305-615-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | KEYS | FL |
| 2012-11-09 | 305-842-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | KEYS | FL |
| 2012-11-09 | 305-842-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | KEYS | FL |
| 2012-07-12 | 305-417-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | KEYS | FL |
| 2012-06-06 | 305-748-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | KEYS | FL |
| 2012-02-10 | 305-501-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | KEYS | FL |
| 2011-09-21 | 305-501-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | KEYS | FL |
| 2011-08-18 | 305-290-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | KEYS | FL |
| 2010-12-22 | 305-240-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | KEYS | FL |
| 2010-11-22 | 305-748-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | KEYS | FL |
| 2010-10-06 | 305-521-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | NORTH DADE | FL |
| 2010-10-06 | 305-749-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | NORTH DADE | FL |
| 2010-10-06 | 305-760-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | NORTH DADE | FL |
| 2010-05-20 | 305-515-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | KEYS | FL |
| 2010-02-26 | 305-809-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | KEYS | FL |
| 2010-01-28 | 305-222-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | MIAMI | FL |
| 2010-01-28 | 305-400-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | MIAMI | FL |
| 2009-12-04 | 305-424-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | MIAMI | FL |
| 2009-12-04 | 305-424-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | MIAMI | FL |
| 2008-07-08 | 305-974-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | NORTH DADE | FL |
| 2008-05-01 | 305-712-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | KEYS | FL |
| 2008-05-01 | 305-712-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | KEYS | FL |
| 2008-04-01 | 305-517-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | KEYS | FL |
| 2008-03-14 | 305-517-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | KEYS | FL |
| 2008-03-03 | 305-728-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | MIAMI | FL |
| 2008-03-03 | 305-742-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | MIAMI | FL |
| 2008-01-31 | 305-514-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | MIAMI | FL |
| 2008-01-21 | 305-459-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | MIAMI | FL |
| 2007-11-20 | 305-432-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | KEYS | FL |
| 2007-10-26 | 305-853-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | KEYS | FL |
| 2007-09-12 | 305-390-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | KEYS | FL |
| 2007-08-29 | 305-809-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | KEYS | FL |
| 2007-08-29 | 305-809-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | KEYS | FL |
| 2007-08-29 | 305-809-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | KEYS | FL |
| 2006-12-08 | 305-509-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | KEYS | FL |
| 2006-12-08 | 305-509-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | KEYS | FL |
| 2006-12-08 | 305-509-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | KEYS | FL |
| 2006-09-26 | 305-403-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | MIAMI | FL |
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.