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 |
|---|---|---|---|---|---|---|---|
| 2012-10-19 | 563-549-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | DAVENPORT | IA |
| 2012-10-01 | 563-231-0XXX | 0000–0999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | DUBUQUE | IA |
| 2012-09-26 | 563-586-8XXX | 8000–8999 | Assigned | MCC TELEPHONY LLC | 593K | HARPESFRRY | IA |
| 2012-09-25 | 563-559-1XXX | 1000–1999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | CLINTON | IA |
| 2012-09-21 | 563-258-1XXX | 1000–1999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | DUBUQUE | IA |
| 2012-09-20 | 563-594-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | DAVENPORT | IA |
| 2012-09-20 | 563-594-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | DAVENPORT | 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 |
| 2012-09-05 | 563-424-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | DAVENPORT | IA |
| 2012-08-21 | 563-559-2XXX | 2000–2999 | Assigned | MCC TELEPHONY OF IOWA, LLC - IA | 751F | CLINTON | IA |
| 2012-08-13 | 563-277-2XXX | 2000–2999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | DECORAH | IA |
| 2012-07-25 | 563-424-1XXX | 1000–1999 | Assigned | MCC TELEPHONY OF IOWA, LLC - IA | 751F | DAVENPORT | 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 |
| 2012-07-17 | 563-258-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - IA | 985E | DUBUQUE | IA |
| 2012-07-12 | 563-875-4XXX | 4000–4999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | DYERSVILLE | IA |
| 2012-06-22 | 563-554-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | MUSCATINE | IA |
| 2012-06-15 | 563-447-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - IA | 985E | WALCOTT | IA |
| 2012-06-12 | 563-217-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - IA | 985E | WAUKON | IA |
| 2012-04-25 | 563-562-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - IA | 985E | CALMAR | IA |
| 2012-04-05 | 563-258-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - IA | 8344 | DUBUQUE | IA |
| 2012-03-27 | 563-258-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - IA | 985E | DUBUQUE | IA |
| 2012-03-27 | 563-519-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - IA | 985E | CLINTON | IA |
| 2012-03-02 | 563-639-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | DAVENPORT | IA |
| 2012-02-24 | 563-259-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - IA | 985E | CLINTON | IA |
| 2012-02-22 | 563-549-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | DAVENPORT | IA |
| 2012-02-21 | 563-484-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | DAVENPORT | IA |
| 2012-02-08 | 563-424-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - IA | 985E | DAVENPORT | IA |
| 2012-01-31 | 563-569-2XXX | 2000–2999 | Assigned | WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH | 1167 | PROTIVIN | IA |
| 2012-01-26 | 563-275-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - IA | 985E | DAVENPORT | IA |
| 2012-01-18 | 563-313-4XXX | 4000–4999 | Assigned | WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH | 1167 | CRESCO | IA |
| 2011-12-29 | 563-258-2XXX | 2000–2999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | DUBUQUE | IA |
| 2011-12-19 | 563-484-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | DAVENPORT | IA |
| 2011-12-16 | 563-876-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | EPWORTH | IA |
| 2011-12-13 | 563-258-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | DUBUQUE | IA |
| 2011-12-13 | 563-484-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | DAVENPORT | IA |
| 2011-12-13 | 563-748-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - IA | 985E | MAQUOKETA | IA |
| 2011-12-08 | 563-277-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DECORAH | IA |
| 2011-12-06 | 563-538-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - IA | 985E | LANSING | IA |
| 2011-12-02 | 563-639-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | DAVENPORT | IA |
| 2011-11-23 | 563-748-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MAQUOKETA | IA |
| 2011-11-17 | 563-275-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - IA | 985E | DAVENPORT | IA |
| 2011-11-15 | 563-213-5XXX | 5000–5999 | Assigned | ONVOY, LLC - IA | 221F | DUBUQUE | IA |
| 2011-11-15 | 563-241-7XXX | 7000–7999 | Assigned | ONVOY, LLC - IA | 221F | CLINTON | IA |
| 2011-11-15 | 563-607-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | MUSCATINE | IA |
| 2011-10-24 | 563-424-5XXX | 5000–5999 | Assigned | MCC TELEPHONY OF IOWA, LLC - IA | 751F | DAVENPORT | IA |
| 2011-10-21 | 563-424-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | DAVENPORT | 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.