NumberResearchRecent thousands-block assignments
19 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, last 30 days — NPA 445
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
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Jan 2026
Dec 2025
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2018-01-15 | 445-428-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PHLDLPHZN2 | PA |
| 2018-01-15 | 445-428-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PHLDLPHZN2 | PA |
| 2018-01-15 | 445-428-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PHLDLPHZN2 | PA |
| 2018-01-15 | 445-428-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PHLDLPHZN2 | PA |
| 2018-01-15 | 445-428-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PHLDLPHZN2 | PA |
| 2018-01-15 | 445-428-9XXX | 9000–9999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PHLDLPHZN2 | PA |
| 2018-01-15 | 445-444-4XXX | 4000–4999 | Assigned | ONVOY, LLC - PA | 547E | PHLDLPHZN1 | PA |
| 2018-01-15 | 445-777-7XXX | 7000–7999 | Assigned | ONVOY, LLC - PA | 547E | YARDLEY | PA |
| 2018-01-15 | 445-800-0XXX | 0000–0999 | Assigned | ONVOY, LLC - PA | 547E | PHLDLPHZN3 | PA |
| 2018-01-15 | 445-800-8XXX | 8000–8999 | Assigned | ONVOY, LLC - PA | 547E | PHLDLPHZN3 | PA |
| 2018-01-15 | 445-888-8XXX | 8000–8999 | Assigned | ONVOY, LLC - PA | 547E | PHLDLPHZN2 | PA |
| 2018-01-15 | 445-999-5XXX | 5000–5999 | Assigned | ONVOY, LLC - PA | 547E | HARLEYSVL | PA |
| 2018-01-15 | 445-999-9XXX | 9000–9999 | Assigned | ONVOY, LLC - PA | 547E | HARLEYSVL | PA |
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.