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
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Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2018-01-30 | 623-289-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | PHOENIX | AZ |
| 2018-01-18 | 623-289-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
| 2018-01-18 | 623-289-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
| 2018-01-18 | 623-289-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
| 2018-01-18 | 623-289-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
| 2018-01-09 | 623-235-9XXX | 9000–9999 | Assigned | COMCAST IP PHONE, LLC | 318J | PHOENIX | AZ |
| 2018-01-09 | 623-300-9XXX | 9000–9999 | Assigned | COMCAST IP PHONE, LLC | 318J | PHOENIX | AZ |
| 2017-12-26 | 623-235-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | PHOENIX | AZ |
| 2017-11-10 | 623-233-0XXX | 0000–0999 | Assigned | ONVOY, LLC - AZ | 630E | PHOENIX | AZ |
| 2017-11-09 | 623-562-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | PHOENIX | AZ |
| 2017-11-09 | 623-562-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | PHOENIX | AZ |
| 2017-10-25 | 623-683-0XXX | 0000–0999 | Assigned | COMCAST IP PHONE, LLC | 318J | PHOENIX | AZ |
| 2017-10-25 | 623-683-1XXX | 1000–1999 | Assigned | COMCAST IP PHONE, LLC | 318J | PHOENIX | AZ |
| 2017-10-25 | 623-683-2XXX | 2000–2999 | Assigned | COMCAST IP PHONE, LLC | 318J | PHOENIX | AZ |
| 2017-10-25 | 623-683-3XXX | 3000–3999 | Assigned | COMCAST IP PHONE, LLC | 318J | PHOENIX | AZ |
| 2017-10-25 | 623-683-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | PHOENIX | AZ |
| 2017-10-25 | 623-683-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | PHOENIX | AZ |
| 2017-10-25 | 623-683-6XXX | 6000–6999 | Assigned | COMCAST IP PHONE, LLC | 318J | PHOENIX | AZ |
| 2017-10-25 | 623-683-7XXX | 7000–7999 | Assigned | COMCAST IP PHONE, LLC | 318J | PHOENIX | AZ |
| 2017-10-25 | 623-683-8XXX | 8000–8999 | Assigned | COMCAST IP PHONE, LLC | 318J | PHOENIX | AZ |
| 2017-10-25 | 623-683-9XXX | 9000–9999 | Assigned | COMCAST IP PHONE, LLC | 318J | PHOENIX | AZ |
| 2017-10-24 | 623-562-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
| 2017-10-24 | 623-562-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
| 2017-10-24 | 623-562-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
| 2017-10-24 | 623-562-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
| 2017-10-24 | 623-562-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
| 2017-08-28 | 623-233-1XXX | 1000–1999 | Assigned | RE-INVENT TELECOM, LLC - AZ | 663G | PHOENIX | AZ |
| 2017-08-14 | 623-469-6XXX | 6000–6999 | Assigned | ONVOY, LLC - AZ | 630E | PHOENIX | AZ |
| 2017-08-14 | 623-469-7XXX | 7000–7999 | Assigned | ONVOY, LLC - AZ | 630E | PHOENIX | AZ |
| 2017-08-14 | 623-469-8XXX | 8000–8999 | Assigned | ONVOY, LLC - AZ | 630E | PHOENIX | AZ |
| 2017-08-14 | 623-469-9XXX | 9000–9999 | Assigned | ONVOY, LLC - AZ | 630E | PHOENIX | AZ |
| 2017-07-24 | 623-235-8XXX | 8000–8999 | Assigned | ONVOY, LLC - AZ | 630E | PHOENIX | AZ |
| 2017-07-24 | 623-404-5XXX | 5000–5999 | Assigned | ONVOY, LLC - AZ | 630E | PHOENIX | AZ |
| 2017-07-24 | 623-404-6XXX | 6000–6999 | Assigned | ONVOY, LLC - AZ | 630E | PHOENIX | AZ |
| 2017-07-24 | 623-404-8XXX | 8000–8999 | Assigned | ONVOY, LLC - AZ | 630E | PHOENIX | AZ |
| 2017-07-24 | 623-404-9XXX | 9000–9999 | Assigned | ONVOY, LLC - AZ | 630E | PHOENIX | AZ |
| 2017-07-17 | 623-439-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | PHOENIX | AZ |
| 2017-06-28 | 623-404-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
| 2017-06-28 | 623-404-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
| 2017-06-28 | 623-404-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
| 2017-06-28 | 623-404-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
| 2017-06-28 | 623-404-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
| 2017-06-23 | 623-562-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | PHOENIX | AZ |
| 2017-06-02 | 623-235-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | PHOENIX | AZ |
| 2017-05-01 | 623-404-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | PHOENIX | AZ |
| 2017-05-01 | 623-469-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
| 2017-05-01 | 623-469-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
| 2017-05-01 | 623-469-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
| 2017-05-01 | 623-469-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
| 2017-05-01 | 623-469-4XXX | 4000–4999 | 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.