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 |
|---|---|---|---|---|---|---|---|
| 2017-05-15 | 563-233-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | SUMNER | IA |
| 2017-05-15 | 563-428-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | RANDALIA | IA |
| 2017-05-15 | 563-569-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | PROTIVIN | IA |
| 2017-05-15 | 563-778-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | ST LUCAS | IA |
| 2017-05-15 | 563-932-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | RYAN | IA |
| 2017-05-15 | 563-933-3XXX | 3000–3999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | STRAWBRYPT | IA |
| 2017-05-11 | 563-224-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | MAYNARD | IA |
| 2017-05-11 | 563-363-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | MANCHESTER | IA |
| 2017-05-11 | 563-566-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | LIME SPG | IA |
| 2017-05-11 | 563-605-6XXX | 6000–6999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | POSTVILLE | IA |
| 2017-05-10 | 563-204-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | LANSING | IA |
| 2017-05-10 | 563-207-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | DUBUQUE | IA |
| 2017-05-10 | 563-237-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | FREDECKSBG | IA |
| 2017-05-10 | 563-303-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | FAYETTE | IA |
| 2017-05-10 | 563-482-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IA | 9877 | LAWLER | IA |
| 2017-05-10 | 563-924-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | LAMONT | IA |
| 2017-05-10 | 563-925-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | GREELEY | IA |
| 2017-05-10 | 563-928-4XXX | 4000–4999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | EDGEWOOD | IA |
| 2017-05-09 | 563-202-3XXX | 3000–3999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | DECORAH | IA |
| 2017-05-09 | 563-203-6XXX | 6000–6999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | CRESCO | IA |
| 2017-05-09 | 563-429-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | ALPHA | IA |
| 2017-05-09 | 563-562-5XXX | 5000–5999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | CALMAR | IA |
| 2017-05-09 | 563-633-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | ARLINGTON | IA |
| 2017-05-09 | 563-922-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | DELHI | IA |
| 2017-05-03 | 563-214-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | DAVENPORT | IA |
| 2017-05-03 | 563-214-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | DAVENPORT | IA |
| 2017-05-03 | 563-235-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | DUBUQUE | IA |
| 2017-04-21 | 563-202-2XXX | 2000–2999 | Assigned | ONVOY, LLC - IA | 221F | DECORAH | IA |
| 2017-04-21 | 563-202-5XXX | 5000–5999 | Assigned | ONVOY, LLC - IA | 221F | DECORAH | IA |
| 2017-04-21 | 563-412-6XXX | 6000–6999 | Assigned | ONVOY, LLC - IA | 221F | WEST UNION | IA |
| 2017-04-11 | 563-203-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CRESCO | IA |
| 2017-04-07 | 563-253-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | TIPTON | IA |
| 2017-03-24 | 563-230-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IA | 9877 | DYERSVILLE | IA |
| 2017-03-24 | 563-363-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IA | 9877 | MANCHESTER | IA |
| 2017-03-24 | 563-744-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IA | 9877 | FARLEY | IA |
| 2017-03-24 | 563-853-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IA | 9877 | LUXEMBURG | IA |
| 2017-03-24 | 563-855-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IA | 9877 | WORTHINGTN | IA |
| 2017-03-24 | 563-856-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IA | 9877 | COLESBURG | IA |
| 2017-03-24 | 563-870-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IA | 9877 | HOLY CROSS | IA |
| 2017-03-24 | 563-876-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IA | 9877 | EPWORTH | IA |
| 2017-03-24 | 563-921-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IA | 9877 | NEW VIENNA | IA |
| 2017-03-24 | 563-922-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IA | 9877 | DELHI | IA |
| 2017-03-24 | 563-923-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IA | 9877 | EARLVILLE | IA |
| 2017-03-24 | 563-925-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IA | 9877 | GREELEY | IA |
| 2017-03-24 | 563-926-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IA | 9877 | HOPKINTON | IA |
| 2017-03-24 | 563-932-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IA | 9877 | RYAN | IA |
| 2017-02-27 | 563-214-5XXX | 5000–5999 | Assigned | MCC TELEPHONY OF IOWA, LLC - IA | 751F | DAVENPORT | IA |
| 2017-02-24 | 563-687-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IA | 9877 | SABULA | IA |
| 2017-02-24 | 563-872-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IA | 9877 | BELLEVUE | IA |
| 2017-02-22 | 563-207-5XXX | 5000–5999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | DUBUQUE | 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.