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
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2017-07-20 | 615-470-6XXX | 6000–6999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | LEBANON | TN |
| 2015-07-30 | 615-283-2XXX | 2000–2999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | NOLENSVL | TN |
| 2014-06-05 | 615-558-2XXX | 2000–2999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | LAVERGNE | TN |
| 2013-10-24 | 615-992-2XXX | 2000–2999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | GOODLETSVL | TN |
| 2012-10-09 | 615-265-5XXX | 5000–5999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | HENDERSNVL | TN |
| 2011-02-07 | 615-984-1XXX | 1000–1999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | SMYRNA | TN |
| 2007-05-15 | 615-712-2XXX | 2000–2999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | NASHVILLE | TN |
| 2006-05-10 | 615-691-9XXX | 9000–9999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | MURFREESBO | TN |
| 2006-05-02 | 615-598-9XXX | 9000–9999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | NASHVILLE | TN |
| 2005-11-18 | 615-739-9XXX | 9000–9999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | NASHVILLE | TN |
| 2005-09-09 | 615-691-7XXX | 7000–7999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | MURFREESBO | TN |
| 2005-09-09 | 615-691-8XXX | 8000–8999 | Assigned | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | MURFREESBO | 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.