NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026
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
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Jun 2026
May 2026
Apr 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 |
|---|---|---|---|---|---|---|---|
| 2024-05-07 | 901-723-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MEMPHIS | TN |
| 2023-02-28 | 901-742-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | ARLINGTON | TN |
| 2022-03-13 | 901-664-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MEMPHIS | TN |
| 2022-02-11 | 901-664-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MEMPHIS | TN |
| 2022-02-08 | 901-664-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MEMPHIS | TN |
| 2021-12-21 | 901-464-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MEMPHIS | TN |
| 2021-08-24 | 901-519-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MEMPHIS | TN |
| 2021-05-11 | 901-464-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MEMPHIS | TN |
| 2021-03-09 | 901-464-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MEMPHIS | TN |
| 2021-01-12 | 901-463-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MEMPHIS | TN |
| 2020-10-13 | 901-560-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MEMPHIS | TN |
| 2018-05-08 | 901-520-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MILLINGTON | TN |
| 2017-05-31 | 901-805-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MEMPHIS | TN |
| 2017-05-31 | 901-805-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MEMPHIS | TN |
| 2017-02-28 | 901-243-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MUNFORD | TN |
| 2016-06-22 | 901-630-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MEMPHIS | TN |
| 2016-06-20 | 901-667-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | WESTWHITEV | TN |
| 2016-04-29 | 901-472-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | COLLIERVL | TN |
| 2016-01-22 | 901-930-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MEMPHIS | TN |
| 2015-08-20 | 901-530-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MEMPHIS | TN |
| 2015-08-04 | 901-614-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MEMPHIS | TN |
| 2015-07-24 | 901-453-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MEMPHIS | TN |
| 2014-09-30 | 901-453-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MEMPHIS | TN |
| 2014-09-30 | 901-453-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MEMPHIS | TN |
| 2014-09-24 | 901-316-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | COLLIERVL | TN |
| 2014-09-15 | 901-430-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | ARLINGTON | TN |
| 2014-08-04 | 901-567-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MEMPHIS | TN |
| 2014-07-11 | 901-509-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MEMPHIS | TN |
| 2014-06-27 | 901-410-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MEMPHIS | TN |
| 2014-06-27 | 901-531-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MEMPHIS | TN |
| 2014-04-17 | 901-425-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MEMPHIS | TN |
| 2014-04-17 | 901-425-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MEMPHIS | TN |
| 2013-12-06 | 901-612-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MEMPHIS | TN |
| 2013-12-06 | 901-612-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MEMPHIS | TN |
| 2013-10-04 | 901-495-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MEMPHIS | TN |
| 2012-11-15 | 901-244-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MEMPHIS | TN |
| 2012-10-17 | 901-407-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MILLINGTON | TN |
| 2012-08-06 | 901-244-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MEMPHIS | TN |
| 2012-06-01 | 901-444-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | ARLINGTON | TN |
| 2012-05-23 | 901-352-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | LAGRANGE | TN |
| 2012-05-17 | 901-877-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MOSCOW | TN |
| 2012-01-30 | 901-235-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | SOMERVILLE | TN |
| 2011-09-09 | 901-290-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | ARLINGTON | TN |
| 2011-07-27 | 901-343-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MEMPHIS | TN |
| 2011-07-27 | 901-746-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MEMPHIS | TN |
| 2011-07-21 | 901-235-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | SOMERVILLE | TN |
| 2010-12-06 | 901-310-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MEMPHIS | TN |
| 2010-12-06 | 901-310-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MEMPHIS | TN |
| 2010-12-06 | 901-310-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MEMPHIS | TN |
| 2010-11-29 | 901-300-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MEMPHIS | TN |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.