NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/24/2026
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 657
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2022-06-09 | 657-610-1XXX | 1000–1999 | Assigned | BARR TELL USA, LLC | 026K | SANTA ANA | CA |
| 2022-06-09 | 657-770-7XXX | 7000–7999 | Assigned | BARR TELL USA, LLC | 026K | WESTMINSTR | CA |
| 2022-06-08 | 657-355-5XXX | 5000–5999 | Assigned | BARR TELL USA, LLC | 026K | HUNTITNBCH | CA |
| 2022-06-08 | 657-602-1XXX | 1000–1999 | Assigned | BARR TELL USA, LLC | 026K | ANAHEIM | CA |
| 2022-06-08 | 657-722-5XXX | 5000–5999 | Assigned | BARR TELL USA, LLC | 026K | GARDEN GRV | CA |
| 2022-05-31 | 657-571-5XXX | 5000–5999 | Assigned | BARR TELL USA, LLC | 026K | YORBALINDA | CA |
| 2022-05-31 | 657-579-0XXX | 0000–0999 | Assigned | BARR TELL USA, LLC | 026K | ORANGE | CA |
| 2022-05-31 | 657-767-7XXX | 7000–7999 | Assigned | BARR TELL USA, LLC | 026K | FULLERTON | CA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.