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 530
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2026-04-29 | 530-997-2XXX | 2000–2999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | MARYSVILLE | CA |
| 2023-06-15 | 530-849-9XXX | 9000–9999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | SHINGLETN | CA |
| 2023-06-14 | 530-658-7XXX | 7000–7999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | ESPARTO | CA |
| 2023-06-14 | 530-975-1XXX | 1000–1999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | GRIDLEY | CA |
| 2023-05-08 | 530-940-1XXX | 1000–1999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | AUBN MAIN | CA |
| 2023-05-04 | 530-255-5XXX | 5000–5999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | REDDING | CA |
| 2023-05-04 | 530-433-7XXX | 7000–7999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | CHICO | CA |
| 2023-05-04 | 530-656-9XXX | 9000–9999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | NICOLAUS | CA |
| 2023-05-04 | 530-704-1XXX | 1000–1999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | WOODLAND | CA |
| 2023-05-04 | 530-880-9XXX | 9000–9999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | ORLAND | CA |
| 2023-05-04 | 530-930-0XXX | 0000–0999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | MARYSVILLE | CA |
| 2023-05-04 | 530-952-0XXX | 0000–0999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | PLVL WEST | CA |
| 2023-05-01 | 530-943-9XXX | 9000–9999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | WILLOWS | CA |
| 2023-05-01 | 530-947-9XXX | 9000–9999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | COLUSA | CA |
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.