NumberResearchThousands-blocks in 559-813
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 559-813 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 |
|---|---|---|---|---|---|---|---|
| — | 559-813-0XXX | 0000–0999 | Reserved | T-MOBILE USA, INC. | 6529 | FOWLER | CA |
| 2015-02-18 | 559-813-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | FOWLER | CA |
| 2009-11-09 | 559-813-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CA | 649C | FOWLER | CA |
| 2007-02-14 | 559-813-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FOWLER | CA |
| 2015-02-18 | 559-813-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | FOWLER | CA |
| 2015-02-18 | 559-813-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | FOWLER | CA |
| 2015-01-14 | 559-813-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | FOWLER | CA |
| 2024-11-12 | 559-813-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FOWLER | CA |
| 2015-07-14 | 559-813-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | FOWLER | CA |
| 2013-10-15 | 559-813-9XXX | 9000–9999 | Assigned | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | FOWLER | 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.