NumberResearchThousands-blocks in 615-412
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/20/2026
The ten 1,000-number thousand-blocks inside prefix 615-412 and who was initially assigned each. Under pooling these blocks often belong to different carriers — the single prefix-level “assignee” is usually just the pool / code holder, not who holds the numbers. ← all 615 blocks
Most active assignees, all time — NPA 615
New assignments by month
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2004-10-21 | 615-412-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | SPENCERMIL | TN |
| 2005-11-11 | 615-412-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | SPENCERMIL | TN |
| 2020-09-02 | 615-412-2XXX | 2000–2999 | Assigned | TELNYX LLC | 073H | SPENCERMIL | TN |
| 2022-11-29 | 615-412-3XXX | 3000–3999 | Assigned | ONVOY, LLC - TN | 525E | SPENCERMIL | TN |
| 2022-07-06 | 615-412-4XXX | 4000–4999 | Assigned | TERRA NOVA TELECOM INC. | 145J | SPENCERMIL | TN |
| 2018-02-22 | 615-412-5XXX | 5000–5999 | Assigned | ONVOY, LLC - TN | 525E | SPENCERMIL | TN |
| — | 615-412-6XXX | 6000–6999 | Reserved | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | SPENCERMIL | TN |
| 2009-09-25 | 615-412-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SPENCERMIL | TN |
| 2020-05-07 | 615-412-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | SPENCERMIL | TN |
| 2008-10-30 | 615-412-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | SPENCERMIL | 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.