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 |
|---|---|---|---|---|---|---|---|
| 2022-03-08 | 559-955-2XXX | 2000–2999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | TIVYVALLEY | CA |
| 2022-03-02 | 559-993-3XXX | 3000–3999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | VISALIA | CA |
| 2022-02-24 | 559-939-9XXX | 9000–9999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | FRESNO | CA |
| 2022-02-18 | 559-929-9XXX | 9000–9999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | HANFORD | CA |
| 2022-02-18 | 559-996-6XXX | 6000–6999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | CORCORAN | CA |
| 2021-07-14 | 559-933-6XXX | 6000–6999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | FIREBAUGH | CA |
| 2021-05-04 | 559-715-0XXX | 0000–0999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | CHOWCHILLA | 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.