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 972
New assignments by month
Sep 2026
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2018-03-05 | 972-440-8XXX | 8000–8999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | CARROLLTON | TX |
| 2013-08-28 | 972-457-4XXX | 4000–4999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | IRVING | TX |
| 2011-04-13 | 972-905-2XXX | 2000–2999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | PLANO | TX |
| 2010-02-19 | 972-966-7XXX | 7000–7999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | LEWISVILLE | TX |
| 2010-02-06 | 972-894-3XXX | 3000–3999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | IRVING | TX |
| 2009-12-14 | 972-309-3XXX | 3000–3999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | PLANO | TX |
| 2009-08-05 | 972-395-6XXX | 6000–6999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | CARROLLTON | TX |
| 2008-11-03 | 972-769-3XXX | 3000–3999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | PLANO | TX |
| 2008-06-02 | 972-244-8XXX | 8000–8999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | PLANO | TX |
| 2007-07-19 | 972-372-2XXX | 2000–2999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | PLANO | TX |
| 2007-04-18 | 972-265-7XXX | 7000–7999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | PLANO | TX |
| 2006-08-07 | 972-295-6XXX | 6000–6999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | PLANO | TX |
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.