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 283
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2024-02-12 | 283-200-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | TRENTON | OH |
| 2024-02-12 | 283-216-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | BETHANY | OH |
| 2024-02-06 | 283-201-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | CLERMONT | OH |
| 2024-02-06 | 283-206-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | WILLIAMSBG | OH |
| 2024-02-06 | 283-207-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | SHANDON | OH |
| 2024-02-06 | 283-208-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | HARRISON | OH |
| 2024-02-06 | 283-214-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | NEWTONSVL | OH |
| 2024-02-06 | 283-215-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | HAMILTON | OH |
| 2024-02-06 | 283-217-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | LTL MIAMI | OH |
| 2024-02-06 | 283-444-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | BETHEL | 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.