NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026
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 513
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2018-11-08 | 513-202-2XXX | 2000–2999 | Assigned | INVOXIO INCORPORATED | 158H | HARRISON | OH |
| 2018-11-08 | 513-216-6XXX | 6000–6999 | Assigned | INVOXIO INCORPORATED | 158H | BETHEL | OH |
| 2018-11-08 | 513-447-0XXX | 0000–0999 | Assigned | INVOXIO INCORPORATED | 158H | SHANDON | OH |
| 2018-11-08 | 513-499-9XXX | 9000–9999 | Assigned | INVOXIO INCORPORATED | 158H | HAMILTON | OH |
| 2018-11-08 | 513-597-7XXX | 7000–7999 | Assigned | INVOXIO INCORPORATED | 158H | NEWTONSVL | OH |
| 2018-11-08 | 513-757-7XXX | 7000–7999 | Assigned | INVOXIO INCORPORATED | 158H | REILY | OH |
| 2018-11-08 | 513-901-5XXX | 5000–5999 | Assigned | INVOXIO INCORPORATED | 158H | WILLIAMSBG | OH |
| 2018-11-08 | 513-966-6XXX | 6000–6999 | Assigned | INVOXIO INCORPORATED | 158H | LTL MIAMI | OH |
| 2018-11-08 | 513-982-3XXX | 3000–3999 | Assigned | INVOXIO INCORPORATED | 158H | SEVEN MILE | OH |
| 2018-09-24 | 513-799-9XXX | 9000–9999 | Assigned | INVOXIO INCORPORATED | 158H | CINCINNATI | OH |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.