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 559
New assignments by month
Sep 2026
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2021-07-13 | 559-944-4XXX | 4000–4999 | Assigned | FRACTEL, LLC | 965H | FRESNO | CA |
| 2021-04-19 | 559-833-3XXX | 3000–3999 | Assigned | FRACTEL, LLC | 965H | SELMA | CA |
| 2021-04-16 | 559-966-6XXX | 6000–6999 | Assigned | FRACTEL, LLC | 965H | SPRINGVL | CA |
| 2021-03-05 | 559-758-6XXX | 6000–6999 | Assigned | FRACTEL, LLC | 965H | PARLIER | CA |
| 2021-03-05 | 559-946-3XXX | 3000–3999 | Assigned | FRACTEL, LLC | 965H | VISALIA | CA |
| 2020-11-19 | 559-844-4XXX | 4000–4999 | Assigned | FRACTEL, LLC | 965H | MIRANTPHST | CA |
| 2020-07-24 | 559-599-9XXX | 9000–9999 | Assigned | FRACTEL, LLC | 965H | CLOVIS | CA |
| 2020-07-10 | 559-699-9XXX | 9000–9999 | Assigned | FRACTEL, LLC | 965H | VISALIA | CA |
| 2020-07-10 | 559-955-5XXX | 5000–5999 | Assigned | FRACTEL, LLC | 965H | TIVYVALLEY | CA |
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.