NumberResearchThousands-blocks in 559-756
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/19/2026
The ten 1,000-number thousand-blocks inside prefix 559-756 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 559 blocks
Most active assignees, all time — NPA 559
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 559-756-0XXX | 0000–0999 | Reserved | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTERVL | CA |
| — | 559-756-1XXX | 1000–1999 | Reserved | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTERVL | CA |
| — | 559-756-2XXX | 2000–2999 | Reserved | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTERVL | CA |
| — | 559-756-3XXX | 3000–3999 | Reserved | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTERVL | CA |
| — | 559-756-4XXX | 4000–4999 | Reserved | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTERVL | CA |
| — | 559-756-5XXX | 5000–5999 | Reserved | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTERVL | CA |
| — | 559-756-6XXX | 6000–6999 | Reserved | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTERVL | CA |
| 2015-05-08 | 559-756-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | PORTERVL | CA |
| 2010-05-05 | 559-756-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTERVL | CA |
| 2011-05-18 | 559-756-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTERVL | CA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.