NumberResearchThousands-blocks in 563-424
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/19/2026
The ten 1,000-number thousand-blocks inside prefix 563-424 and who was initially assigned each. Under pooling these blocks often belong to different carriers — the single prefix-level “assignee” is usually just the pool / code holder, not who holds the numbers. ← all 563 blocks
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 |
|---|---|---|---|---|---|---|---|
| 2011-01-06 | 563-424-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | DAVENPORT | IA |
| 2012-07-25 | 563-424-1XXX | 1000–1999 | Assigned | MCC TELEPHONY OF IOWA, LLC - IA | 751F | DAVENPORT | IA |
| 2010-02-16 | 563-424-2XXX | 2000–2999 | Assigned | MCC TELEPHONY OF IOWA, LLC - IA | 751F | DAVENPORT | IA |
| 2011-08-10 | 563-424-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DAVENPORT | IA |
| 2011-03-22 | 563-424-4XXX | 4000–4999 | Assigned | MCC TELEPHONY OF IOWA, LLC - IA | 751F | DAVENPORT | IA |
| 2011-10-24 | 563-424-5XXX | 5000–5999 | Assigned | MCC TELEPHONY OF IOWA, LLC - IA | 751F | DAVENPORT | IA |
| 2012-02-08 | 563-424-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - IA | 985E | DAVENPORT | IA |
| 2011-01-10 | 563-424-7XXX | 7000–7999 | Assigned | ONVOY, LLC - IA | 221F | DAVENPORT | IA |
| 2011-10-21 | 563-424-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | DAVENPORT | IA |
| 2012-09-05 | 563-424-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | DAVENPORT | IA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.