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 281
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2012-07-20 | 281-751-2XXX | 2000–2999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | MONTBLVIEU | TX |
| 2012-03-21 | 281-918-5XXX | 5000–5999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | BEACH CITY | TX |
| 2011-12-23 | 281-747-4XXX | 4000–4999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | PORTER | TX |
| 2010-04-22 | 281-887-0XXX | 0000–0999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | SATSUMA | TX |
| 2010-04-22 | 281-887-1XXX | 1000–1999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | SATSUMA | TX |
| 2010-04-22 | 281-887-2XXX | 2000–2999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | SATSUMA | TX |
| 2010-04-22 | 281-887-3XXX | 3000–3999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | SATSUMA | TX |
| 2010-04-22 | 281-887-4XXX | 4000–4999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | SATSUMA | TX |
| 2010-04-22 | 281-887-5XXX | 5000–5999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | SATSUMA | TX |
| 2010-04-22 | 281-887-6XXX | 6000–6999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | SATSUMA | TX |
| 2010-04-22 | 281-887-7XXX | 7000–7999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | SATSUMA | TX |
| 2010-04-22 | 281-887-8XXX | 8000–8999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | SATSUMA | TX |
| 2010-04-22 | 281-887-9XXX | 9000–9999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | SATSUMA | TX |
| 2009-05-21 | 281-886-5XXX | 5000–5999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | HSTNSUBURB | TX |
| 2009-03-18 | 281-737-0XXX | 0000–0999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | SATSUMA | TX |
| 2009-03-18 | 281-737-1XXX | 1000–1999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | SATSUMA | TX |
| 2009-03-18 | 281-737-2XXX | 2000–2999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | SATSUMA | TX |
| 2009-03-18 | 281-737-3XXX | 3000–3999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | SATSUMA | TX |
| 2009-03-18 | 281-737-4XXX | 4000–4999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | SATSUMA | TX |
| 2009-03-18 | 281-737-5XXX | 5000–5999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | SATSUMA | TX |
| 2009-03-18 | 281-737-6XXX | 6000–6999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | SATSUMA | TX |
| 2009-03-18 | 281-737-7XXX | 7000–7999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | SATSUMA | TX |
| 2009-03-18 | 281-737-8XXX | 8000–8999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | SATSUMA | TX |
| 2009-03-18 | 281-737-9XXX | 9000–9999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | SATSUMA | TX |
| 2008-12-04 | 281-532-7XXX | 7000–7999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | KEMAH | TX |
| 2008-10-14 | 281-775-6XXX | 6000–6999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | BAMMEL | TX |
| 2008-10-03 | 281-302-1XXX | 1000–1999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | SUGAR LAND | TX |
| 2008-10-03 | 281-302-2XXX | 2000–2999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | SUGAR LAND | TX |
| 2007-09-28 | 281-207-8XXX | 8000–8999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | SUGAR LAND | TX |
| 2007-09-14 | 281-714-2XXX | 2000–2999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | HOUSTON | TX |
| 2007-09-14 | 281-714-3XXX | 3000–3999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | HOUSTON | TX |
| 2007-09-14 | 281-714-4XXX | 4000–4999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | HOUSTON | TX |
| 2007-07-19 | 281-501-4XXX | 4000–4999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | HOUSTON | TX |
| 2007-07-19 | 281-501-5XXX | 5000–5999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | HOUSTON | TX |
| 2006-08-31 | 281-690-4XXX | 4000–4999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | SUGAR LAND | TX |
| 2006-08-31 | 281-690-5XXX | 5000–5999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | SUGAR LAND | TX |
| 2006-04-13 | 281-245-3XXX | 3000–3999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | ALVIN | TX |
| 2005-05-26 | 281-249-6XXX | 6000–6999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | HSTNSUBURB | TX |
| 2005-05-26 | 281-943-3XXX | 3000–3999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | BAMMEL | TX |
| 2005-05-26 | 281-944-1XXX | 1000–1999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | BARKER | TX |
| 2004-02-11 | 281-762-6XXX | 6000–6999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | RICHMNRNBG | TX |
| 2004-02-09 | 281-202-6XXX | 6000–6999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | RICHMNRNBG | TX |
| 2003-10-14 | 281-516-6XXX | 6000–6999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | TOMBALL | 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.