NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026
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 435
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2024-05-21 | 435-238-1XXX | 1000–1999 | Assigned | VONAGE AMERICA LLC | 197D | CEDAR CITY | UT |
| 2023-12-18 | 435-354-2XXX | 2000–2999 | Assigned | VONAGE AMERICA LLC | 197D | TOOELE | UT |
| 2022-07-14 | 435-800-4XXX | 4000–4999 | Assigned | VONAGE AMERICA LLC | 197D | PARK CITY | UT |
| 2021-09-16 | 435-600-3XXX | 3000–3999 | Assigned | VONAGE AMERICA LLC | 197D | PAROWAN | UT |
| 2021-05-17 | 435-523-6XXX | 6000–6999 | Assigned | VONAGE AMERICA LLC | 197D | ST GEORGE | UT |
| 2021-05-17 | 435-534-8XXX | 8000–8999 | Assigned | VONAGE AMERICA LLC | 197D | LOGAN | UT |
| 2021-05-17 | 435-534-9XXX | 9000–9999 | Assigned | VONAGE AMERICA LLC | 197D | LOGAN | UT |
| 2019-12-16 | 435-610-4XXX | 4000–4999 | Assigned | VONAGE AMERICA LLC | 197D | NEPHI | UT |
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.