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
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2014-05-09 | 512-269-4XXX | 4000–4999 | Assigned | AUSTIN BESTLINE COMPANY | 7551 | TAYLOR | TX |
| 2014-05-09 | 512-281-8XXX | 8000–8999 | Assigned | AUSTIN BESTLINE COMPANY | 7551 | ELGIN | TX |
| 2014-05-09 | 512-515-2XXX | 2000–2999 | Assigned | AUSTIN BESTLINE COMPANY | 7551 | LIBERTY HL | TX |
| 2014-05-09 | 512-778-3XXX | 3000–3999 | Assigned | AUSTIN BESTLINE COMPANY | 7551 | LIBERTY HL | TX |
| 2014-05-06 | 512-227-8XXX | 8000–8999 | Assigned | AUSTIN BESTLINE COMPANY | 7551 | LOCKHART | TX |
| 2014-05-06 | 512-359-1XXX | 1000–1999 | Assigned | AUSTIN BESTLINE COMPANY | 7551 | LOCKHART | TX |
| 2008-04-29 | 512-798-6XXX | 6000–6999 | Assigned | AUSTIN BESTLINE COMPANY | 7551 | SMITHVILLE | TX |
| 2008-04-22 | 512-360-6XXX | 6000–6999 | Assigned | AUSTIN BESTLINE COMPANY | 7551 | SMITHVILLE | TX |
| 2006-01-19 | 512-492-3XXX | 3000–3999 | Assigned | AUSTIN BESTLINE COMPANY | 7551 | AUSTIN | TX |
| 2004-07-07 | 512-772-0XXX | 0000–0999 | Assigned | AUSTIN BESTLINE COMPANY | 7551 | BASTROP | 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.