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 561
New assignments by month
Sep 2026
Aug 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2015-04-30 | 561-295-2XXX | 2000–2999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | JUPITER | FL |
| 2006-03-10 | 561-208-9XXX | 9000–9999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | BOCA RATON | FL |
| 2006-03-01 | 561-847-7XXX | 7000–7999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | WPALMBEACH | FL |
| 2005-09-26 | 561-208-7XXX | 7000–7999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | BOCA RATON | FL |
| 2005-07-01 | 561-494-8XXX | 8000–8999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | WPALMBEACH | FL |
| 2005-06-29 | 561-665-2XXX | 2000–2999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | DELRAY BCH | FL |
| 2005-06-29 | 561-665-3XXX | 3000–3999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | DELRAY BCH | FL |
| 2005-06-29 | 561-847-8XXX | 8000–8999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | WPALMBEACH | FL |
| 2005-06-10 | 561-634-9XXX | 9000–9999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | BOYNTONBCH | FL |
| 2005-06-10 | 561-847-9XXX | 9000–9999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | WPALMBEACH | FL |
| 2005-06-10 | 561-948-9XXX | 9000–9999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | BOCA RATON | FL |
| 2005-03-23 | 561-520-0XXX | 0000–0999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | BOCA RATON | FL |
| 2005-03-23 | 561-520-1XXX | 1000–1999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | BOCA RATON | FL |
| 2005-03-23 | 561-520-2XXX | 2000–2999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | BOCA RATON | FL |
| 2005-03-23 | 561-520-3XXX | 3000–3999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | BOCA RATON | FL |
| 2005-03-23 | 561-520-4XXX | 4000–4999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | BOCA RATON | FL |
| 2005-03-23 | 561-520-5XXX | 5000–5999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | BOCA RATON | FL |
| 2005-03-23 | 561-520-6XXX | 6000–6999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | BOCA RATON | FL |
| 2005-03-23 | 561-520-7XXX | 7000–7999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | BOCA RATON | FL |
| 2005-03-23 | 561-520-8XXX | 8000–8999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | BOCA RATON | FL |
| 2005-03-23 | 561-520-9XXX | 9000–9999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | BOCA RATON | FL |
| 2005-03-23 | 561-521-0XXX | 0000–0999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | BOYNTONBCH | FL |
| 2005-03-23 | 561-521-1XXX | 1000–1999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | BOYNTONBCH | FL |
| 2005-03-23 | 561-521-2XXX | 2000–2999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | BOYNTONBCH | FL |
| 2005-03-23 | 561-521-3XXX | 3000–3999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | BOYNTONBCH | FL |
| 2005-03-23 | 561-521-4XXX | 4000–4999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | BOYNTONBCH | FL |
| 2005-03-23 | 561-521-5XXX | 5000–5999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | BOYNTONBCH | FL |
| 2005-03-23 | 561-521-6XXX | 6000–6999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | BOYNTONBCH | FL |
| 2005-03-23 | 561-521-7XXX | 7000–7999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | BOYNTONBCH | FL |
| 2005-03-23 | 561-521-8XXX | 8000–8999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | BOYNTONBCH | FL |
| 2005-03-23 | 561-521-9XXX | 9000–9999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | BOYNTONBCH | FL |
| 2005-03-23 | 561-522-0XXX | 0000–0999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | DELRAY BCH | FL |
| 2005-03-23 | 561-522-1XXX | 1000–1999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | DELRAY BCH | FL |
| 2005-03-23 | 561-522-2XXX | 2000–2999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | DELRAY BCH | FL |
| 2005-03-23 | 561-522-3XXX | 3000–3999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | DELRAY BCH | FL |
| 2005-03-23 | 561-522-4XXX | 4000–4999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | DELRAY BCH | FL |
| 2005-03-23 | 561-522-5XXX | 5000–5999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | DELRAY BCH | FL |
| 2005-03-23 | 561-522-6XXX | 6000–6999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | DELRAY BCH | FL |
| 2005-03-23 | 561-522-7XXX | 7000–7999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | DELRAY BCH | FL |
| 2005-03-23 | 561-522-8XXX | 8000–8999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | DELRAY BCH | FL |
| 2005-03-23 | 561-522-9XXX | 9000–9999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | DELRAY BCH | FL |
| 2004-10-21 | 561-455-8XXX | 8000–8999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | DELRAY BCH | FL |
| 2002-11-22 | 561-208-0XXX | 0000–0999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | BOCA RATON | FL |
| 2002-11-22 | 561-253-9XXX | 9000–9999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | WPALMBEACH | FL |
| 2002-11-22 | 561-327-0XXX | 0000–0999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | BOYNTONBCH | FL |
| 2002-11-22 | 561-455-9XXX | 9000–9999 | Assigned | LEVEL 3 TELECOM OF FLORIDA, LP - FL | 7635 | DELRAY BCH | 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.