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 615
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 |
|---|---|---|---|---|---|---|---|
| 2022-12-19 | 615-359-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | LAFAYETTE | TN |
| 2021-04-20 | 615-583-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MT JULIET | TN |
| 2019-09-03 | 615-795-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | NASHVILLE | TN |
| 2018-05-25 | 615-553-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MT JULIET | TN |
| 2018-02-22 | 615-819-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | NOLENSVL | TN |
| 2017-11-15 | 615-762-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | NASHVILLE | TN |
| 2017-11-15 | 615-814-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | FRANKLIN | TN |
| 2017-08-01 | 615-814-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | FRANKLIN | TN |
| 2017-07-13 | 615-762-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | NASHVILLE | TN |
| 2017-05-09 | 615-814-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | FRANKLIN | TN |
| 2016-12-28 | 615-288-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MT JULIET | TN |
| 2016-08-22 | 615-903-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | LAVERGNE | TN |
| 2015-11-03 | 615-432-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | NASHVILLE | TN |
| 2015-11-03 | 615-432-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | NASHVILLE | TN |
| 2015-08-13 | 615-922-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | NASHVILLE | TN |
| 2015-07-07 | 615-922-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | NASHVILLE | TN |
| 2015-06-16 | 615-922-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | NASHVILLE | TN |
| 2015-04-21 | 615-645-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | NASHVILLE | TN |
| 2014-09-30 | 615-645-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | NASHVILLE | TN |
| 2014-09-30 | 615-928-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | NASHVILLE | TN |
| 2014-08-04 | 615-645-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | NASHVILLE | TN |
| 2014-08-04 | 615-645-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | NASHVILLE | TN |
| 2014-07-17 | 615-645-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | NASHVILLE | TN |
| 2014-07-17 | 615-645-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | NASHVILLE | TN |
| 2014-07-17 | 615-645-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | NASHVILLE | TN |
| 2014-06-06 | 615-933-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | NASHVILLE | TN |
| 2014-04-04 | 615-490-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | NASHVILLE | TN |
| 2014-04-04 | 615-724-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | NASHVILLE | TN |
| 2014-03-13 | 615-203-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MURFREESBO | TN |
| 2014-02-13 | 615-913-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | NASHVILLE | TN |
| 2013-12-27 | 615-682-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | ADMSCDARHL | TN |
| 2013-10-18 | 615-454-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | NASHVILLE | TN |
| 2013-10-18 | 615-490-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | NASHVILLE | TN |
| 2013-09-25 | 615-913-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | NASHVILLE | TN |
| 2013-09-25 | 615-913-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | NASHVILLE | TN |
| 2013-06-21 | 615-864-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | NASHVILLE | TN |
| 2013-06-21 | 615-997-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | NASHVILLE | TN |
| 2013-06-04 | 615-200-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | NASHVILLE | TN |
| 2013-06-04 | 615-761-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | NASHVILLE | TN |
| 2013-04-05 | 615-610-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | NASHVILLE | TN |
| 2013-02-28 | 615-209-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | NASHVILLE | TN |
| 2012-12-20 | 615-651-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | NASHVILLE | TN |
| 2012-11-28 | 615-567-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | FRANKLIN | TN |
| 2012-08-06 | 615-603-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | MURFREESBO | TN |
| 2012-02-27 | 615-806-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | NASHVILLE | TN |
| 2012-02-27 | 615-806-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | NASHVILLE | TN |
| 2012-02-16 | 615-257-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | LEBANON | TN |
| 2011-12-16 | 615-861-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | FRANKLIN | TN |
| 2011-07-27 | 615-751-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | SMYRNA | TN |
| 2011-05-13 | 615-678-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | NASHVILLE | 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.