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 479
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
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Dec 2025
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2017-01-23 | 479-367-8XXX | 8000–8999 | Assigned | SOUTHWESTERN BELL | 9533 | BENTONVL | AR |
| 2016-09-20 | 479-401-3XXX | 3000–3999 | Assigned | SOUTHWESTERN BELL | 9533 | FORT SMITH | AR |
| 2016-04-18 | 479-401-5XXX | 5000–5999 | Assigned | SOUTHWESTERN BELL | 9533 | FORT SMITH | AR |
| 2015-09-18 | 479-401-4XXX | 4000–4999 | Assigned | SOUTHWESTERN BELL | 9533 | FORT SMITH | AR |
| 2015-01-08 | 479-286-9XXX | 9000–9999 | Assigned | SOUTHWESTERN BELL | 9533 | BENTONVL | AR |
| 2014-04-28 | 479-320-3XXX | 3000–3999 | Assigned | SOUTHWESTERN BELL | 9533 | SPRINGDALE | AR |
| 2013-04-25 | 479-226-5XXX | 5000–5999 | Assigned | SOUTHWESTERN BELL | 9533 | FORT SMITH | AR |
| 2013-01-14 | 479-802-7XXX | 7000–7999 | Assigned | SOUTHWESTERN BELL | 9533 | BENTONVL | AR |
| 2010-01-28 | 479-261-0XXX | 0000–0999 | Assigned | SOUTHWESTERN BELL | 9533 | SPRINGDALE | AR |
| 2010-01-28 | 479-261-1XXX | 1000–1999 | Assigned | SOUTHWESTERN BELL | 9533 | SPRINGDALE | AR |
| 2010-01-28 | 479-261-2XXX | 2000–2999 | Assigned | SOUTHWESTERN BELL | 9533 | SPRINGDALE | AR |
| 2010-01-28 | 479-261-3XXX | 3000–3999 | Assigned | SOUTHWESTERN BELL | 9533 | SPRINGDALE | AR |
| 2010-01-28 | 479-261-4XXX | 4000–4999 | Assigned | SOUTHWESTERN BELL | 9533 | SPRINGDALE | AR |
| 2010-01-28 | 479-261-5XXX | 5000–5999 | Assigned | SOUTHWESTERN BELL | 9533 | SPRINGDALE | AR |
| 2010-01-28 | 479-261-6XXX | 6000–6999 | Assigned | SOUTHWESTERN BELL | 9533 | SPRINGDALE | AR |
| 2010-01-28 | 479-261-7XXX | 7000–7999 | Assigned | SOUTHWESTERN BELL | 9533 | SPRINGDALE | AR |
| 2010-01-28 | 479-261-8XXX | 8000–8999 | Assigned | SOUTHWESTERN BELL | 9533 | SPRINGDALE | AR |
| 2010-01-28 | 479-261-9XXX | 9000–9999 | Assigned | SOUTHWESTERN BELL | 9533 | SPRINGDALE | AR |
| 2008-09-23 | 479-553-0XXX | 0000–0999 | Assigned | SOUTHWESTERN BELL | 9533 | BENTONVL | AR |
| 2008-09-23 | 479-553-5XXX | 5000–5999 | Assigned | SOUTHWESTERN BELL | 9533 | BENTONVL | AR |
| 2008-01-25 | 479-717-0XXX | 0000–0999 | Assigned | SOUTHWESTERN BELL | 9533 | SPRINGDALE | AR |
| 2007-06-28 | 479-338-0XXX | 0000–0999 | Assigned | SOUTHWESTERN BELL | 9533 | ROGERS | AR |
| 2007-06-28 | 479-338-1XXX | 1000–1999 | Assigned | SOUTHWESTERN BELL | 9533 | ROGERS | AR |
| 2007-06-28 | 479-338-2XXX | 2000–2999 | Assigned | SOUTHWESTERN BELL | 9533 | ROGERS | AR |
| 2007-06-28 | 479-338-3XXX | 3000–3999 | Assigned | SOUTHWESTERN BELL | 9533 | ROGERS | AR |
| 2007-06-28 | 479-338-4XXX | 4000–4999 | Assigned | SOUTHWESTERN BELL | 9533 | ROGERS | AR |
| 2007-06-28 | 479-338-5XXX | 5000–5999 | Assigned | SOUTHWESTERN BELL | 9533 | ROGERS | AR |
| 2007-06-28 | 479-338-6XXX | 6000–6999 | Assigned | SOUTHWESTERN BELL | 9533 | ROGERS | AR |
| 2007-06-28 | 479-338-7XXX | 7000–7999 | Assigned | SOUTHWESTERN BELL | 9533 | ROGERS | AR |
| 2007-06-28 | 479-338-8XXX | 8000–8999 | Assigned | SOUTHWESTERN BELL | 9533 | ROGERS | AR |
| 2007-06-28 | 479-338-9XXX | 9000–9999 | Assigned | SOUTHWESTERN BELL | 9533 | ROGERS | AR |
| 2006-11-13 | 479-361-7XXX | 7000–7999 | Assigned | SOUTHWESTERN BELL | 9533 | SPRINGDALE | AR |
| 2006-02-14 | 479-418-7XXX | 7000–7999 | Assigned | SOUTHWESTERN BELL | 9533 | BENTONVL | AR |
| 2006-02-14 | 479-418-8XXX | 8000–8999 | Assigned | SOUTHWESTERN BELL | 9533 | BENTONVL | AR |
| 2006-02-13 | 479-333-7XXX | 7000–7999 | Assigned | SOUTHWESTERN BELL TELEPHONE COMPANY - AR | 8870 | ELMSPRINGS | AR |
| 2006-02-13 | 479-844-7XXX | 7000–7999 | Assigned | SOUTHWESTERN BELL TELEPHONE COMPANY - AR | 8870 | ELMSPRINGS | AR |
| 2006-01-09 | 479-553-6XXX | 6000–6999 | Assigned | SOUTHWESTERN BELL | 9533 | BENTONVL | AR |
| 2005-02-25 | 479-419-2XXX | 2000–2999 | Assigned | SOUTHWESTERN BELL | 9533 | SPRINGDALE | AR |
| 2005-02-25 | 479-419-3XXX | 3000–3999 | Assigned | SOUTHWESTERN BELL | 9533 | SPRINGDALE | AR |
| 2004-12-03 | 479-696-7XXX | 7000–7999 | Assigned | SOUTHWESTERN BELL | 9533 | BENTONVL | AR |
| 2004-12-03 | 479-696-8XXX | 8000–8999 | Assigned | SOUTHWESTERN BELL | 9533 | BENTONVL | AR |
| 2004-10-28 | 479-696-3XXX | 3000–3999 | Assigned | SOUTHWESTERN BELL | 9533 | BENTONVL | AR |
| 2004-10-13 | 479-258-0XXX | 0000–0999 | Assigned | SOUTHWESTERN BELL | 9533 | BENTONVL | AR |
| 2004-10-13 | 479-258-1XXX | 1000–1999 | Assigned | SOUTHWESTERN BELL | 9533 | BENTONVL | AR |
| 2004-10-13 | 479-258-2XXX | 2000–2999 | Assigned | SOUTHWESTERN BELL | 9533 | BENTONVL | AR |
| 2004-10-13 | 479-258-3XXX | 3000–3999 | Assigned | SOUTHWESTERN BELL | 9533 | BENTONVL | AR |
| 2004-10-13 | 479-258-4XXX | 4000–4999 | Assigned | SOUTHWESTERN BELL | 9533 | BENTONVL | AR |
| 2004-10-13 | 479-258-5XXX | 5000–5999 | Assigned | SOUTHWESTERN BELL | 9533 | BENTONVL | AR |
| 2004-10-13 | 479-258-6XXX | 6000–6999 | Assigned | SOUTHWESTERN BELL | 9533 | BENTONVL | AR |
| 2004-10-13 | 479-258-7XXX | 7000–7999 | Assigned | SOUTHWESTERN BELL | 9533 | BENTONVL | AR |
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.