NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026
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
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2018-01-19 | 530-568-8XXX | 8000–8999 | Assigned | CAL-ORE COMMUNICATIONS, INC. - CA | 734E | MT SHASTA | CA |
| 2016-11-16 | 530-319-8XXX | 8000–8999 | Assigned | CAL-ORE COMMUNICATIONS, INC. - CA | 734E | REDDING | CA |
| 2011-07-13 | 530-841-7XXX | 7000–7999 | Assigned | CAL-ORE COMMUNICATIONS, INC. - CA | 734E | YREKA | CA |
| 2009-05-07 | 530-657-8XXX | 8000–8999 | Assigned | CAL-ORE COMMUNICATIONS, INC. - CA | 734E | WEED | CA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.