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 901
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
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Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2014-10-17 | 901-468-0XXX | 0000–0999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | COLLIERVL | TN |
| 2014-10-17 | 901-468-1XXX | 1000–1999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | COLLIERVL | TN |
| 2014-10-17 | 901-468-2XXX | 2000–2999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | COLLIERVL | TN |
| 2014-01-21 | 901-860-6XXX | 6000–6999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | COLLIERVL | TN |
| 2013-07-30 | 901-471-5XXX | 5000–5999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | COLLIERVL | TN |
| 2013-07-30 | 901-860-7XXX | 7000–7999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | COLLIERVL | TN |
| 2010-03-10 | 901-654-2XXX | 2000–2999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | MEMPHIS | TN |
| 2009-02-23 | 901-302-2XXX | 2000–2999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | MEMPHIS | TN |
| 2009-02-23 | 901-302-3XXX | 3000–3999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | MEMPHIS | TN |
| 2009-02-19 | 901-866-8XXX | 8000–8999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | MEMPHIS | TN |
| 2008-07-11 | 901-275-3XXX | 3000–3999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | MEMPHIS | TN |
| 2008-07-11 | 901-601-3XXX | 3000–3999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | MEMPHIS | TN |
| 2007-01-29 | 901-636-0XXX | 0000–0999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | MEMPHIS | TN |
| 2007-01-29 | 901-636-1XXX | 1000–1999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | MEMPHIS | TN |
| 2007-01-29 | 901-636-2XXX | 2000–2999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | MEMPHIS | TN |
| 2007-01-29 | 901-636-3XXX | 3000–3999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | MEMPHIS | TN |
| 2007-01-29 | 901-636-4XXX | 4000–4999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | MEMPHIS | TN |
| 2007-01-29 | 901-636-5XXX | 5000–5999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | MEMPHIS | TN |
| 2007-01-29 | 901-636-6XXX | 6000–6999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | MEMPHIS | TN |
| 2007-01-29 | 901-636-7XXX | 7000–7999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | MEMPHIS | TN |
| 2007-01-29 | 901-636-8XXX | 8000–8999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | MEMPHIS | TN |
| 2007-01-29 | 901-636-9XXX | 9000–9999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | MEMPHIS | TN |
| 2006-10-17 | 901-653-2XXX | 2000–2999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | MEMPHIS | TN |
| 2006-10-17 | 901-653-3XXX | 3000–3999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | MEMPHIS | TN |
| 2006-05-17 | 901-221-5XXX | 5000–5999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | COLLIERVL | TN |
| 2006-05-16 | 901-457-6XXX | 6000–6999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | COLLIERVL | TN |
| 2006-03-01 | 901-435-9XXX | 9000–9999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | MEMPHIS | TN |
| 2006-01-31 | 901-399-7XXX | 7000–7999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | MEMPHIS | TN |
| 2006-01-31 | 901-399-8XXX | 8000–8999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | MEMPHIS | TN |
| 2005-08-05 | 901-288-1XXX | 1000–1999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | MEMPHIS | TN |
| 2005-08-05 | 901-288-2XXX | 2000–2999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | MEMPHIS | TN |
| 2005-06-29 | 901-435-2XXX | 2000–2999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | MEMPHIS | TN |
| 2005-06-29 | 901-435-3XXX | 3000–3999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | MEMPHIS | TN |
| 2005-05-02 | 901-435-1XXX | 1000–1999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | MEMPHIS | TN |
| 2005-03-29 | 901-701-2XXX | 2000–2999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | MEMPHIS | TN |
| 2005-03-29 | 901-701-9XXX | 9000–9999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | MEMPHIS | TN |
| 2005-03-15 | 901-531-6XXX | 6000–6999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | MEMPHIS | TN |
| 2005-03-15 | 901-531-7XXX | 7000–7999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | MEMPHIS | TN |
| 2004-11-10 | 901-692-5XXX | 5000–5999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | MEMPHIS | TN |
| 2004-11-10 | 901-692-9XXX | 9000–9999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | MEMPHIS | TN |
| 2004-11-05 | 901-531-8XXX | 8000–8999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | MEMPHIS | TN |
| 2004-09-02 | 901-515-9XXX | 9000–9999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | MEMPHIS | TN |
| 2004-05-19 | 901-507-8XXX | 8000–8999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | MEMPHIS | TN |
| 2004-01-23 | 901-507-6XXX | 6000–6999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | MEMPHIS | TN |
| 2004-01-23 | 901-507-7XXX | 7000–7999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | MEMPHIS | TN |
| 2003-02-06 | 901-457-3XXX | 3000–3999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | COLLIERVL | TN |
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.