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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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2012-09-26 | 563-586-8XXX | 8000–8999 | Assigned | MCC TELEPHONY LLC | 593K | HARPESFRRY | IA |
| 2012-09-06 | 563-245-5XXX | 5000–5999 | Assigned | MCC TELEPHONY LLC | 593K | ELKADER | IA |
| 2012-09-06 | 563-252-6XXX | 6000–6999 | Assigned | MCC TELEPHONY LLC | 593K | GUTTENBERG | IA |
| 2012-09-06 | 563-964-5XXX | 5000–5999 | Assigned | MCC TELEPHONY LLC | 593K | GARNAVILLO | IA |
| 2012-07-18 | 563-217-3XXX | 3000–3999 | Assigned | MCC TELEPHONY LLC | 593K | WAUKON | IA |
| 2012-07-18 | 563-329-2XXX | 2000–2999 | Assigned | MCC TELEPHONY LLC | 593K | MCGREGOR | IA |
| 2012-07-18 | 563-538-2XXX | 2000–2999 | Assigned | MCC TELEPHONY LLC | 593K | LANSING | IA |
| 2010-03-19 | 563-277-1XXX | 1000–1999 | Assigned | MCC TELEPHONY LLC | 593K | DECORAH | IA |
| 2010-03-19 | 563-412-1XXX | 1000–1999 | Assigned | MCC TELEPHONY LLC | 593K | WEST UNION | IA |
| 2010-03-17 | 563-203-8XXX | 8000–8999 | Assigned | MCC TELEPHONY LLC | 593K | CRESCO | IA |
| 2010-03-17 | 563-233-8XXX | 8000–8999 | Assigned | MCC TELEPHONY LLC | 593K | SUMNER | IA |
| 2010-03-17 | 563-237-0XXX | 0000–0999 | Assigned | MCC TELEPHONY LLC | 593K | FREDECKSBG | IA |
| 2010-03-17 | 563-425-8XXX | 8000–8999 | Assigned | MCC TELEPHONY LLC | 593K | FAYETTE | IA |
| 2010-03-17 | 563-566-8XXX | 8000–8999 | Assigned | MCC TELEPHONY LLC | 593K | LIME SPG | IA |
| 2010-03-17 | 563-569-0XXX | 0000–0999 | Assigned | MCC TELEPHONY LLC | 593K | PROTIVIN | IA |
| 2010-03-17 | 563-637-8XXX | 8000–8999 | Assigned | MCC TELEPHONY LLC | 593K | MAYNARD | IA |
| 2010-03-17 | 563-725-8XXX | 8000–8999 | Assigned | MCC TELEPHONY LLC | 593K | ELGIN | IA |
| 2010-03-17 | 563-928-0XXX | 0000–0999 | Assigned | MCC TELEPHONY LLC | 593K | EDGEWOOD | IA |
| 2010-03-17 | 563-933-0XXX | 0000–0999 | Assigned | MCC TELEPHONY LLC | 593K | STRAWBRYPT | IA |
| 2010-03-15 | 563-454-9XXX | 9000–9999 | Assigned | MCC TELEPHONY LLC | 593K | WYOMING | IA |
| 2010-03-15 | 563-562-1XXX | 1000–1999 | Assigned | MCC TELEPHONY LLC | 593K | CALMAR | IA |
| 2010-03-15 | 563-683-9XXX | 9000–9999 | Assigned | MCC TELEPHONY LLC | 593K | NEW ALBIN | IA |
| 2010-03-15 | 563-764-9XXX | 9000–9999 | Assigned | MCC TELEPHONY LLC | 593K | OSSIAN | IA |
| 2010-03-05 | 563-358-9XXX | 9000–9999 | Assigned | MCC TELEPHONY LLC | 593K | FTATKINSON | IA |
| 2010-02-16 | 563-822-1XXX | 1000–1999 | Assigned | MCC TELEPHONY LLC | 593K | MANCHESTER | IA |
| 2005-06-13 | 563-387-6XXX | 6000–6999 | Assigned | MCC TELEPHONY LLC | 593K | DECORAH | 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.