NumberResearchThousands-blocks in 512-772
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/20/2026
The ten 1,000-number thousand-blocks inside prefix 512-772 and who was initially assigned each. Under pooling these blocks often belong to different carriers — the single prefix-level “assignee” is usually just the pool / code holder, not who holds the numbers. ← all 512 blocks
Most active assignees, all time — NPA 512
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2004-07-07 | 512-772-0XXX | 0000–0999 | Assigned | AUSTIN BESTLINE COMPANY | 7551 | BASTROP | TX |
| 2004-10-15 | 512-772-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | BASTROP | TX |
| 2005-01-31 | 512-772-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | BASTROP | TX |
| 2005-01-31 | 512-772-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | BASTROP | TX |
| — | 512-772-4XXX | 4000–4999 | Reserved | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | BASTROP | TX |
| 2011-03-26 | 512-772-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | BASTROP | TX |
| 2015-01-09 | 512-772-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | BASTROP | TX |
| 2008-12-04 | 512-772-7XXX | 7000–7999 | Assigned | SOUTHWESTERN BELL | 9533 | BASTROP | TX |
| 2003-12-10 | 512-772-8XXX | 8000–8999 | Assigned | ONVOY, LLC - TX | 903C | BASTROP | TX |
| 2015-01-09 | 512-772-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | 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.