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 307
New assignments by month
Sep 2026
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2021-10-25 | 307-394-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | CASPER | WY |
| 2021-10-25 | 307-441-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | CASPER | WY |
| 2021-09-02 | 307-256-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | CHEYENNE | WY |
| 2021-09-02 | 307-310-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | CHEYENNE | WY |
| 2021-04-22 | 307-243-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | CASPER | WY |
| 2021-04-22 | 307-776-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | CASPER | WY |
| 2021-04-20 | 307-225-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | LARAMIE | WY |
| 2021-04-20 | 307-284-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | JACKSON | WY |
| 2019-02-06 | 307-433-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | CHEYENNE | WY |
| 2019-02-06 | 307-633-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | CHEYENNE | WY |
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.