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 512
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 |
|---|---|---|---|---|---|---|---|
| 2014-03-05 | 512-819-1XXX | 1000–1999 | Assigned | CSC VOICE, LLC | 612K | GEORGETOWN | TX |
| 2014-03-05 | 512-819-6XXX | 6000–6999 | Assigned | CSC VOICE, LLC | 612K | GEORGETOWN | TX |
| 2014-02-03 | 512-598-3XXX | 3000–3999 | Assigned | CSC VOICE, LLC | 612K | JARRELL | TX |
| 2014-02-03 | 512-969-3XXX | 3000–3999 | Assigned | CSC VOICE, LLC | 612K | AUSTIN | TX |
| 2014-02-03 | 512-969-4XXX | 4000–4999 | Assigned | CSC VOICE, LLC | 612K | AUSTIN | TX |
| 2014-02-03 | 512-969-5XXX | 5000–5999 | Assigned | CSC VOICE, LLC | 612K | AUSTIN | TX |
| 2014-01-29 | 512-528-4XXX | 4000–4999 | Assigned | CSC VOICE, LLC | 612K | LEANDER | TX |
| 2014-01-29 | 512-846-0XXX | 0000–0999 | Assigned | CSC VOICE, LLC | 612K | HUTTO | TX |
| 2013-11-05 | 512-688-1XXX | 1000–1999 | Assigned | CSC VOICE, LLC | 612K | GEORGETOWN | TX |
| 2013-11-05 | 512-688-2XXX | 2000–2999 | Assigned | CSC VOICE, LLC | 612K | GEORGETOWN | TX |
| 2013-11-05 | 512-688-3XXX | 3000–3999 | Assigned | CSC VOICE, LLC | 612K | GEORGETOWN | TX |
| 2013-11-05 | 512-688-4XXX | 4000–4999 | Assigned | CSC VOICE, LLC | 612K | GEORGETOWN | TX |
| 2013-11-05 | 512-688-5XXX | 5000–5999 | Assigned | CSC VOICE, LLC | 612K | GEORGETOWN | TX |
| 2012-03-14 | 512-202-3XXX | 3000–3999 | Assigned | CSC VOICE, LLC | 612K | AUSTIN | TX |
| 2011-07-20 | 512-943-0XXX | 0000–0999 | Assigned | CSC VOICE, LLC | 612K | GEORGETOWN | TX |
| 2011-07-20 | 512-943-4XXX | 4000–4999 | Assigned | CSC VOICE, LLC | 612K | GEORGETOWN | TX |
| 2011-07-20 | 512-943-8XXX | 8000–8999 | Assigned | CSC VOICE, LLC | 612K | GEORGETOWN | TX |
| 2010-10-05 | 512-746-6XXX | 6000–6999 | Assigned | CSC VOICE, LLC | 612K | JARRELL | TX |
| 2010-08-23 | 512-948-7XXX | 7000–7999 | Assigned | CSC VOICE, LLC | 612K | GEORGETOWN | TX |
| 2009-09-04 | 512-943-9XXX | 9000–9999 | Assigned | CSC VOICE, LLC | 612K | GEORGETOWN | TX |
| 2008-10-29 | 512-591-7XXX | 7000–7999 | Assigned | CSC VOICE, LLC | 612K | GEORGETOWN | TX |
| 2007-07-26 | 512-986-8XXX | 8000–8999 | Assigned | CSC VOICE, LLC | 612K | LEANDER | TX |
| 2007-06-25 | 512-642-4XXX | 4000–4999 | Assigned | CSC VOICE, LLC | 612K | HUTTO | TX |
| 2007-05-31 | 512-240-5XXX | 5000–5999 | Assigned | CSC VOICE, LLC | 612K | GEORGETOWN | TX |
| 2007-03-26 | 512-852-1XXX | 1000–1999 | Assigned | CSC VOICE, LLC | 612K | AUSTIN | TX |
| 2007-03-08 | 512-986-6XXX | 6000–6999 | Assigned | CSC VOICE, LLC | 612K | LEANDER | TX |
| 2006-08-11 | 512-721-5XXX | 5000–5999 | Assigned | CSC VOICE, LLC | 612K | AUSTIN | TX |
| 2006-07-19 | 512-240-4XXX | 4000–4999 | Assigned | CSC VOICE, LLC | 612K | GEORGETOWN | TX |
| 2006-03-13 | 512-986-5XXX | 5000–5999 | Assigned | CSC VOICE, LLC | 612K | LEANDER | 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.