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 559
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2024-10-08 | 559-654-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SEQUOIA | CA |
| 2024-10-08 | 559-966-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SPRINGVL | CA |
| 2015-09-09 | 559-728-9XXX | 9000–9999 | Assigned | AT&T ENTERPRISES, LLC | 516C | FRESNO | CA |
| 2015-07-09 | 559-377-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MADERA | CA |
| 2015-03-26 | 559-721-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | FRESNO | CA |
| 2014-09-18 | 559-575-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CLOVIS | CA |
| 2014-08-28 | 559-231-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | FRESNO | CA |
| 2014-08-26 | 559-747-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | VISALIA | CA |
| 2014-04-28 | 559-374-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | FRESNO | CA |
| 2013-09-18 | 559-374-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | FRESNO | CA |
| 2011-08-16 | 559-802-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | VISALIA | CA |
| 2011-07-26 | 559-463-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | STRATFORD | CA |
| 2011-07-26 | 559-682-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CARUTHERS | CA |
| 2011-04-21 | 559-570-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | FRESNO | CA |
| 2011-01-25 | 559-384-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | BURREL | CA |
| 2010-10-18 | 559-326-0XXX | 0000–0999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CLOVIS | CA |
| 2010-10-15 | 559-258-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | DEL REY | CA |
| 2010-10-15 | 559-382-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MENDOTA | CA |
| 2010-10-15 | 559-427-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | PIXLEY | CA |
| 2010-10-15 | 559-464-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | TERRABELLA | CA |
| 2010-10-15 | 559-465-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | THREERIVRS | CA |
| 2010-10-15 | 559-466-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | TIPTON | CA |
| 2010-10-15 | 559-596-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | DINUBA | CA |
| 2010-10-15 | 559-694-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | FIREBAUGH | CA |
| 2010-10-15 | 559-763-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | HURON | CA |
| 2010-10-15 | 559-769-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | WOODLAKE | CA |
| 2010-10-15 | 559-821-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | COALINGA | CA |
| 2010-10-15 | 559-823-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ORANGECOVE | CA |
| 2010-10-15 | 559-847-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | PARLIER | CA |
| 2010-10-15 | 559-869-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | KINGSBURG | CA |
| 2010-10-15 | 559-898-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SELMA | CA |
| 2010-10-15 | 559-922-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | LATON | CA |
| 2010-10-15 | 559-997-1XXX | 1000–1999 | Assigned | AT&T ENTERPRISES, LLC | 516C | LEMOORE | CA |
| 2010-10-14 | 559-428-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | RIVERDALE | CA |
| 2010-07-22 | 559-515-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | FRESNO | CA |
| 2009-12-14 | 559-383-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | AVENAL | CA |
| 2009-10-12 | 559-449-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | FRESNO | CA |
| 2008-03-11 | 559-416-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MADERA | CA |
| 2008-03-11 | 559-467-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | TULARE | CA |
| 2008-03-11 | 559-587-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | HANFORD | CA |
| 2008-03-11 | 559-793-4XXX | 4000–4999 | Assigned | AT&T ENTERPRISES, LLC | 516C | PORTERVL | CA |
| 2008-03-11 | 559-940-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CLOVIS | CA |
| 2008-02-22 | 559-372-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | VISALIA | CA |
| 2007-08-09 | 559-715-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CHOWCHILLA | CA |
| 2005-04-08 | 559-375-1XXX | 1000–1999 | Assigned | AT&T ENTERPRISES, LLC | 516C | FRESNO | CA |
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.