NumberResearchRecent thousands-block assignments
0 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, all time — NPA 878
New assignments by month
Sep 2026
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2023-12-20 | 878-243-3XXX | 3000–3999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | WASHINGTON | PA |
| 2023-12-20 | 878-268-2XXX | 2000–2999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | IMPERIAL | PA |
| 2023-12-08 | 878-292-0XXX | 0000–0999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | GREENVILLE | PA |
| 2023-06-14 | 878-837-0XXX | 0000–0999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | BENTLEYVL | PA |
| 2023-05-31 | 878-215-0XXX | 0000–0999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | INDIANA | PA |
| 2023-05-31 | 878-265-2XXX | 2000–2999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | CALIFORNIA | PA |
| 2023-05-26 | 878-200-0XXX | 0000–0999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | SCOTTDALE | PA |
| 2023-05-26 | 878-209-0XXX | 0000–0999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | ALIQUIPPA | PA |
| 2023-05-25 | 878-264-0XXX | 0000–0999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | BEAVER FLS | PA |
| 2023-05-08 | 878-786-0XXX | 0000–0999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | GREENSBURG | PA |
| 2023-05-08 | 878-895-1XXX | 1000–1999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | UNIONTOWN | PA |
| 2021-12-10 | 878-300-9XXX | 9000–9999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | NEW CASTLE | 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.