NumberResearchRecent thousands-block assignments
5 blocks assigned in May 2026 · 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, May 2026 — NPA 406
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2026-05-20 | 406-489-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - MT | 994E | SIDNEY | MT |
| 2026-05-12 | 406-560-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | ANACONDA | MT |
| 2026-05-12 | 406-825-4XXX | 4000–4999 | Assigned | TERRA NOVA TELECOM INC. | 145J | CLINTON | MT |
| 2026-05-12 | 406-933-4XXX | 4000–4999 | Assigned | TERRA NOVA TELECOM INC. | 145J | HELENA | MT |
| 2026-05-11 | 406-380-6XXX | 6000–6999 | Assigned | TERRA NOVA TELECOM INC. | 145J | LEWISTOWN | MT |
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.