NumberResearchRecent thousands-block assignments
2 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 623
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 |
|---|---|---|---|---|---|---|---|
| 2010-07-08 | 623-524-5XXX | 5000–5999 | Assigned | QWEST CORPORATION | 9636 | PHOENIX | AZ |
| 2010-07-08 | 623-524-6XXX | 6000–6999 | Assigned | QWEST CORPORATION | 9636 | PHOENIX | AZ |
| 2010-07-08 | 623-524-7XXX | 7000–7999 | Assigned | QWEST CORPORATION | 9636 | PHOENIX | AZ |
| 2010-07-08 | 623-524-8XXX | 8000–8999 | Assigned | QWEST CORPORATION | 9636 | PHOENIX | AZ |
| 2010-07-08 | 623-524-9XXX | 9000–9999 | Assigned | QWEST CORPORATION | 9636 | PHOENIX | AZ |
| 2010-07-08 | 623-832-0XXX | 0000–0999 | Assigned | QWEST CORPORATION | 9636 | PHOENIX | AZ |
| 2010-07-08 | 623-832-1XXX | 1000–1999 | Assigned | QWEST CORPORATION | 9636 | PHOENIX | AZ |
| 2010-07-08 | 623-832-2XXX | 2000–2999 | Assigned | QWEST CORPORATION | 9636 | PHOENIX | AZ |
| 2010-07-08 | 623-832-3XXX | 3000–3999 | Assigned | QWEST CORPORATION | 9636 | PHOENIX | AZ |
| 2010-07-08 | 623-832-4XXX | 4000–4999 | Assigned | QWEST CORPORATION | 9636 | PHOENIX | AZ |
| 2010-07-08 | 623-832-5XXX | 5000–5999 | Assigned | QWEST CORPORATION | 9636 | PHOENIX | AZ |
| 2010-07-08 | 623-832-6XXX | 6000–6999 | Assigned | QWEST CORPORATION | 9636 | PHOENIX | AZ |
| 2010-07-08 | 623-832-7XXX | 7000–7999 | Assigned | QWEST CORPORATION | 9636 | PHOENIX | AZ |
| 2010-07-08 | 623-832-8XXX | 8000–8999 | Assigned | QWEST CORPORATION | 9636 | PHOENIX | AZ |
| 2010-07-08 | 623-832-9XXX | 9000–9999 | Assigned | QWEST CORPORATION | 9636 | PHOENIX | AZ |
| 2010-06-22 | 623-336-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PHOENIX | AZ |
| 2010-06-15 | 623-336-7XXX | 7000–7999 | Assigned | ONVOY, LLC - AZ | 630E | PHOENIX | AZ |
| 2010-04-22 | 623-498-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PHOENIX | AZ |
| 2010-04-12 | 623-980-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PHOENIX | AZ |
| 2010-04-12 | 623-980-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PHOENIX | AZ |
| 2010-04-09 | 623-349-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | PHOENIX | AZ |
| 2010-04-09 | 623-850-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | PHOENIX | AZ |
| 2010-04-09 | 623-850-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | PHOENIX | AZ |
| 2010-04-08 | 623-336-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PHOENIX | AZ |
| 2010-04-08 | 623-336-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PHOENIX | AZ |
| 2010-04-08 | 623-336-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PHOENIX | AZ |
| 2010-04-08 | 623-336-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PHOENIX | AZ |
| 2010-04-08 | 623-336-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PHOENIX | AZ |
| 2010-04-08 | 623-336-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PHOENIX | AZ |
| 2010-04-05 | 623-688-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
| 2010-04-05 | 623-850-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
| 2010-04-05 | 623-850-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
| 2010-04-05 | 623-850-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
| 2010-04-05 | 623-980-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
| 2010-03-29 | 623-349-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
| 2010-03-29 | 623-349-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
| 2010-03-29 | 623-349-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
| 2010-03-29 | 623-377-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
| 2010-03-29 | 623-377-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
| 2010-03-29 | 623-377-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
| 2010-03-29 | 623-432-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
| 2010-03-29 | 623-688-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
| 2010-03-29 | 623-688-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
| 2010-03-29 | 623-688-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
| 2010-03-29 | 623-688-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
| 2010-03-29 | 623-688-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
| 2010-03-29 | 623-738-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
| 2010-03-29 | 623-738-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
| 2010-03-29 | 623-738-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
| 2010-03-29 | 623-850-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
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.