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 240
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 |
|---|---|---|---|---|---|---|---|
| 2016-02-12 | 240-802-3XXX | 3000–3999 | Assigned | LEVEL 3 TELECOM OF MARYLAND, LLC - MD | 7591 | WSHNGTNZN2 | MD |
| 2015-02-20 | 240-802-4XXX | 4000–4999 | Assigned | LEVEL 3 TELECOM OF MARYLAND, LLC - MD | 7591 | WSHNGTNZN2 | MD |
| 2015-01-20 | 240-552-8XXX | 8000–8999 | Assigned | LEVEL 3 TELECOM OF MARYLAND, LLC - MD | 7591 | WSNGTNZN10 | MD |
| 2013-11-19 | 240-630-6XXX | 6000–6999 | Assigned | LEVEL 3 TELECOM OF MARYLAND, LLC - MD | 7591 | WSHNGTNZN2 | MD |
| 2011-09-21 | 240-848-9XXX | 9000–9999 | Assigned | LEVEL 3 TELECOM OF MARYLAND, LLC - MD | 7591 | GAITHERSBG | MD |
| 2010-08-06 | 240-612-0XXX | 0000–0999 | Assigned | LEVEL 3 TELECOM OF MARYLAND, LLC - MD | 7591 | WSHNGTNZN5 | MD |
| 2010-08-06 | 240-612-1XXX | 1000–1999 | Assigned | LEVEL 3 TELECOM OF MARYLAND, LLC - MD | 7591 | WSHNGTNZN5 | MD |
| 2010-08-06 | 240-612-2XXX | 2000–2999 | Assigned | LEVEL 3 TELECOM OF MARYLAND, LLC - MD | 7591 | WSHNGTNZN5 | MD |
| 2010-08-06 | 240-612-3XXX | 3000–3999 | Assigned | LEVEL 3 TELECOM OF MARYLAND, LLC - MD | 7591 | WSHNGTNZN5 | MD |
| 2010-08-06 | 240-612-4XXX | 4000–4999 | Assigned | LEVEL 3 TELECOM OF MARYLAND, LLC - MD | 7591 | WSHNGTNZN5 | MD |
| 2010-08-06 | 240-612-5XXX | 5000–5999 | Assigned | LEVEL 3 TELECOM OF MARYLAND, LLC - MD | 7591 | WSHNGTNZN5 | MD |
| 2010-08-06 | 240-612-6XXX | 6000–6999 | Assigned | LEVEL 3 TELECOM OF MARYLAND, LLC - MD | 7591 | WSHNGTNZN5 | MD |
| 2010-08-06 | 240-612-7XXX | 7000–7999 | Assigned | LEVEL 3 TELECOM OF MARYLAND, LLC - MD | 7591 | WSHNGTNZN5 | MD |
| 2010-08-06 | 240-612-8XXX | 8000–8999 | Assigned | LEVEL 3 TELECOM OF MARYLAND, LLC - MD | 7591 | WSHNGTNZN5 | MD |
| 2010-08-06 | 240-612-9XXX | 9000–9999 | Assigned | LEVEL 3 TELECOM OF MARYLAND, LLC - MD | 7591 | WSHNGTNZN5 | MD |
| 2009-04-15 | 240-292-5XXX | 5000–5999 | Assigned | LEVEL 3 TELECOM OF MARYLAND, LLC - MD | 7591 | WSNGTNZN11 | MD |
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.