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 858
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2022-04-25 | 858-828-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | SNDG SNDG | CA |
| 2022-04-25 | 858-828-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | SNDG SNDG | CA |
| 2022-04-25 | 858-828-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | SNDG SNDG | CA |
| 2020-12-10 | 858-599-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | NATIONALCY | CA |
| 2020-12-10 | 858-599-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | NATIONALCY | CA |
| 2020-02-13 | 858-988-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | SNDG SNDG | CA |
| 2020-02-13 | 858-988-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | SNDG SNDG | CA |
| 2018-09-12 | 858-987-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | SNDG LVTA | CA |
| 2018-04-11 | 858-302-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | SNDG LVTA | CA |
| 2017-06-28 | 858-285-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | SNDG LVTA | CA |
| 2017-02-07 | 858-499-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | SNDG LVTA | CA |
| 2016-06-28 | 858-276-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | SNDG LVTA | CA |
| 2015-08-14 | 858-262-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | SNDG LVTA | CA |
| 2015-08-14 | 858-262-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | SNDG LVTA | CA |
| 2006-03-30 | 858-952-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | LA JOLLA | CA |
| 2004-06-14 | 858-869-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | LA JOLLA | CA |
| 2003-10-09 | 858-752-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | LA JOLLA | CA |
| 2003-08-01 | 858-752-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | LA JOLLA | CA |
| 2003-06-25 | 858-752-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | LA JOLLA | CA |
| 2003-01-14 | 858-752-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | LA JOLLA | CA |
| 2003-01-14 | 858-752-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | LA JOLLA | CA |
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.