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 563
New assignments by month
Sep 2026
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2016-11-14 | 563-253-9XXX | 9000–9999 | Assigned | WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS | 1170 | TIPTON | IA |
| 2016-08-26 | 563-230-9XXX | 9000–9999 | Assigned | WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH | 1167 | DYERSVILLE | IA |
| 2015-10-30 | 563-339-9XXX | 9000–9999 | Assigned | WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS | 1170 | SUMNER | IA |
| 2015-10-20 | 563-224-9XXX | 9000–9999 | Assigned | WINDSTREAM IOWA COMMUNICATIONS, INC. | 1178 | MAYNARD | IA |
| 2015-10-20 | 563-303-9XXX | 9000–9999 | Assigned | WINDSTREAM IOWA COMMUNICATIONS, INC. | 1178 | FAYETTE | IA |
| 2015-10-20 | 563-482-9XXX | 9000–9999 | Assigned | WINDSTREAM IOWA COMMUNICATIONS, INC. | 1178 | LAWLER | IA |
| 2015-06-29 | 563-228-9XXX | 9000–9999 | Assigned | WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS | 1170 | BELLEVUE | IA |
| 2015-06-29 | 563-315-9XXX | 9000–9999 | Assigned | WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH | 1167 | STRAWBRYPT | IA |
| 2015-06-29 | 563-363-9XXX | 9000–9999 | Assigned | WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH | 1167 | MANCHESTER | IA |
| 2015-06-29 | 563-635-9XXX | 9000–9999 | Assigned | WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS | 1170 | LE CLAIRE | IA |
| 2015-06-29 | 563-655-9XXX | 9000–9999 | Assigned | WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS | 1170 | DE WITT | IA |
| 2012-01-31 | 563-569-2XXX | 2000–2999 | Assigned | WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH | 1167 | PROTIVIN | IA |
| 2012-01-18 | 563-313-4XXX | 4000–4999 | Assigned | WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH | 1167 | CRESCO | IA |
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.