NumberResearchRecent thousands-block assignments
16 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, last 30 days — NPA 563
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2004-12-01 | 563-528-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | DAVENPORT | IA |
| 2004-09-08 | 563-506-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | MUSCATINE | IA |
| 2004-07-15 | 563-209-9XXX | 9000–9999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DAVENPORT | IA |
| 2004-06-29 | 563-219-0XXX | 0000–0999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | CLINTON | IA |
| 2004-06-29 | 563-219-1XXX | 1000–1999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | CLINTON | IA |
| 2004-06-29 | 563-219-2XXX | 2000–2999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | CLINTON | IA |
| 2004-06-29 | 563-219-3XXX | 3000–3999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | CLINTON | IA |
| 2004-06-29 | 563-219-4XXX | 4000–4999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | CLINTON | IA |
| 2004-04-30 | 563-272-3XXX | 3000–3999 | Assigned | QWEST CORPORATION | 9631 | MUSCATINE | IA |
| 2004-04-30 | 563-272-4XXX | 4000–4999 | Assigned | QWEST CORPORATION | 9631 | MUSCATINE | IA |
| 2004-04-30 | 563-272-5XXX | 5000–5999 | Assigned | QWEST CORPORATION | 9631 | MUSCATINE | IA |
| 2004-04-30 | 563-272-6XXX | 6000–6999 | Assigned | QWEST CORPORATION | 9631 | MUSCATINE | IA |
| 2004-04-30 | 563-272-7XXX | 7000–7999 | Assigned | QWEST CORPORATION | 9631 | MUSCATINE | IA |
| 2004-04-15 | 563-552-3XXX | 3000–3999 | Assigned | QWEST CORPORATION | 9631 | DUBUQUE | IA |
| 2004-04-15 | 563-552-4XXX | 4000–4999 | Assigned | QWEST CORPORATION | 9631 | DUBUQUE | IA |
| 2004-04-15 | 563-552-5XXX | 5000–5999 | Assigned | QWEST CORPORATION | 9631 | DUBUQUE | IA |
| 2003-11-11 | 563-506-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | MUSCATINE | IA |
| 2003-08-20 | 563-422-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | WEST UNION | IA |
| 2003-08-20 | 563-422-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | WEST UNION | IA |
| 2003-08-20 | 563-568-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | WAUKON | IA |
| 2003-08-20 | 563-568-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | WAUKON | 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.