NumberResearchThousands-blocks in 956-403
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 956-403 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 956 blocks
Most active assignees, all time — NPA 956
New assignments by month
Sep 2026
Aug 2026
Jul 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2016-05-11 | 956-403-0XXX | 0000–0999 | Assigned | VTX COMMUNICATIONS, LLC | 776A | PHARR | TX |
| 2017-03-07 | 956-403-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | PHARR | TX |
| 2017-03-07 | 956-403-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | PHARR | TX |
| 2016-01-25 | 956-403-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PHARR | TX |
| 2017-03-07 | 956-403-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | PHARR | TX |
| 2016-04-19 | 956-403-5XXX | 5000–5999 | Assigned | SMARTCOM TELEPHONE, LLC | 4866 | PHARR | TX |
| 2017-04-21 | 956-403-6XXX | 6000–6999 | Assigned | ONVOY, LLC - TX | 903C | PHARR | TX |
| 2025-03-06 | 956-403-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | PHARR | TX |
| 2017-07-11 | 956-403-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | PHARR | TX |
| 2017-07-11 | 956-403-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | PHARR | 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.