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 573
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2022-04-13 | 573-515-9XXX | 9000–9999 | Assigned | CHARITON VALLEY COMMUNICATIONS CORPORATION | 250A | SHELBINA | MO |
| 2022-04-13 | 573-600-9XXX | 9000–9999 | Assigned | CHARITON VALLEY COMMUNICATIONS CORPORATION | 250A | HANNIBAL | MO |
| 2020-06-02 | 573-296-5XXX | 5000–5999 | Assigned | CHARITON VALLEY COMMUNICATIONS CORPORATION | 250A | HALLSVILLE | MO |
| 2015-11-16 | 573-735-7XXX | 7000–7999 | Assigned | CHARITON VALLEY COMMUNICATIONS CORPORATION | 250A | MONROECITY | MO |
| 2015-07-28 | 573-600-0XXX | 0000–0999 | Assigned | CHARITON VALLEY COMMUNICATIONS CORPORATION | 250A | HANNIBAL | MO |
| 2014-11-24 | 573-476-0XXX | 0000–0999 | Assigned | CHARITON VALLEY COMMUNICATIONS CORPORATION | 250A | COLUMBIA | MO |
| 2014-11-19 | 573-409-2XXX | 2000–2999 | Assigned | CHARITON VALLEY COMMUNICATIONS CORPORATION | 250A | HERMANN | MO |
| 2014-11-19 | 573-594-8XXX | 8000–8999 | Assigned | CHARITON VALLEY COMMUNICATIONS CORPORATION | 250A | VANDALIA | MO |
| 2014-11-14 | 573-869-0XXX | 0000–0999 | Assigned | CHARITON VALLEY COMMUNICATIONS CORPORATION | 250A | PALMYRA | MO |
| 2014-07-29 | 573-591-0XXX | 0000–0999 | Assigned | CHARITON VALLEY COMMUNICATIONS CORPORATION | 250A | MEXICO | MO |
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.