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 870
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2018-02-28 | 870-383-9XXX | 9000–9999 | Assigned | WINDSTREAM ARKANSAS, INC. | 1691 | ELAINE | AR |
| 2018-02-02 | 870-369-9XXX | 9000–9999 | Assigned | WINDSTREAM ARKANSAS, INC. | 1691 | WILMOT | AR |
| 2016-12-28 | 870-999-9XXX | 9000–9999 | Assigned | WINDSTREAM ARKANSAS, INC. | 1691 | CROSSETT | AR |
| 2016-07-14 | 870-804-9XXX | 9000–9999 | Assigned | WINDSTREAM ARKANSAS, INC. | 1691 | TUCKERMAN | AR |
| 2015-07-14 | 870-320-9XXX | 9000–9999 | Assigned | WINDSTREAM ARKANSAS, INC. | 1691 | SHERIDAN | AR |
| 2015-07-14 | 870-669-9XXX | 9000–9999 | Assigned | WINDSTREAM ARKANSAS, INC. | 1691 | GLENWOOD | AR |
| 2015-07-14 | 870-893-9XXX | 9000–9999 | Assigned | WINDSTREAM ARKANSAS, INC. | 1691 | FORDYCE | AR |
| 2015-07-14 | 870-982-9XXX | 9000–9999 | Assigned | WINDSTREAM ARKANSAS, INC. | 1691 | DE QUEEN | AR |
| 2015-07-14 | 870-985-9XXX | 9000–9999 | Assigned | WINDSTREAM ARKANSAS, INC. | 1691 | MOUNT IDA | AR |
| 2015-06-12 | 870-801-9XXX | 9000–9999 | Assigned | WINDSTREAM ARKANSAS, INC. | 1691 | MARSHALL | AR |
| 2015-04-21 | 870-712-9XXX | 9000–9999 | Assigned | WINDSTREAM ARKANSAS, INC. | 1691 | GREEN FOR | AR |
| 2015-04-21 | 870-909-9XXX | 9000–9999 | Assigned | WINDSTREAM ARKANSAS, INC. | 1691 | BERRYVILLE | AR |
| 2011-06-02 | 870-280-1XXX | 1000–1999 | Assigned | WINDSTREAM ARKANSAS, INC. | 1691 | HARRISON | AR |
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.