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 |
|---|---|---|---|---|---|---|---|
| 2018-11-05 | 623-401-4XXX | 4000–4999 | Assigned | ONVOY, LLC - AZ | 630E | PHOENIX | AZ |
| 2018-11-05 | 623-401-5XXX | 5000–5999 | Assigned | ONVOY, LLC - AZ | 630E | PHOENIX | AZ |
| 2018-11-05 | 623-401-6XXX | 6000–6999 | Assigned | ONVOY, LLC - AZ | 630E | PHOENIX | AZ |
| 2018-11-05 | 623-401-7XXX | 7000–7999 | Assigned | ONVOY, LLC - AZ | 630E | PHOENIX | AZ |
| 2018-11-05 | 623-401-8XXX | 8000–8999 | Assigned | ONVOY, LLC - AZ | 630E | PHOENIX | AZ |
| 2018-11-05 | 623-401-9XXX | 9000–9999 | Assigned | ONVOY, LLC - AZ | 630E | PHOENIX | AZ |
| 2018-10-18 | 623-244-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
| 2018-10-18 | 623-244-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
| 2018-10-18 | 623-473-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
| 2018-09-21 | 623-244-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PHOENIX | AZ |
| 2018-09-04 | 623-244-3XXX | 3000–3999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | PHOENIX | AZ |
| 2018-08-27 | 623-244-4XXX | 4000–4999 | Assigned | ONVOY, LLC - AZ | 630E | PHOENIX | AZ |
| 2018-08-27 | 623-244-5XXX | 5000–5999 | Assigned | ONVOY, LLC - AZ | 630E | PHOENIX | AZ |
| 2018-08-27 | 623-244-6XXX | 6000–6999 | Assigned | ONVOY, LLC - AZ | 630E | PHOENIX | AZ |
| 2018-08-27 | 623-244-7XXX | 7000–7999 | Assigned | ONVOY, LLC - AZ | 630E | PHOENIX | AZ |
| 2018-08-27 | 623-244-8XXX | 8000–8999 | Assigned | ONVOY, LLC - AZ | 630E | PHOENIX | AZ |
| 2018-08-27 | 623-244-9XXX | 9000–9999 | Assigned | ONVOY, LLC - AZ | 630E | PHOENIX | AZ |
| 2018-08-22 | 623-439-6XXX | 6000–6999 | Assigned | ONVOY, LLC - AZ | 630E | PHOENIX | AZ |
| 2018-08-22 | 623-439-7XXX | 7000–7999 | Assigned | ONVOY, LLC - AZ | 630E | PHOENIX | AZ |
| 2018-08-22 | 623-439-8XXX | 8000–8999 | Assigned | ONVOY, LLC - AZ | 630E | PHOENIX | AZ |
| 2018-08-22 | 623-439-9XXX | 9000–9999 | Assigned | ONVOY, LLC - AZ | 630E | PHOENIX | AZ |
| 2018-08-06 | 623-439-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
| 2018-08-06 | 623-439-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
| 2018-08-06 | 623-439-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
| 2018-08-06 | 623-439-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | PHOENIX | AZ |
| 2018-07-24 | 623-439-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AZ | 3285 | PHOENIX | AZ |
| 2018-06-15 | 623-440-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | PHOENIX | AZ |
| 2018-05-29 | 623-440-1XXX | 1000–1999 | Assigned | COMCAST IP PHONE, LLC | 318J | PHOENIX | AZ |
| 2018-05-29 | 623-440-2XXX | 2000–2999 | Assigned | COMCAST IP PHONE, LLC | 318J | PHOENIX | AZ |
| 2018-05-29 | 623-440-3XXX | 3000–3999 | Assigned | COMCAST IP PHONE, LLC | 318J | PHOENIX | AZ |
| 2018-05-29 | 623-440-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | PHOENIX | AZ |
| 2018-05-29 | 623-440-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | PHOENIX | AZ |
| 2018-05-29 | 623-440-6XXX | 6000–6999 | Assigned | COMCAST IP PHONE, LLC | 318J | PHOENIX | AZ |
| 2018-05-29 | 623-440-7XXX | 7000–7999 | Assigned | COMCAST IP PHONE, LLC | 318J | PHOENIX | AZ |
| 2018-05-29 | 623-440-8XXX | 8000–8999 | Assigned | COMCAST IP PHONE, LLC | 318J | PHOENIX | AZ |
| 2018-05-29 | 623-440-9XXX | 9000–9999 | Assigned | COMCAST IP PHONE, LLC | 318J | PHOENIX | AZ |
| 2018-05-04 | 623-231-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | PHOENIX | AZ |
| 2018-04-18 | 623-231-6XXX | 6000–6999 | Assigned | COMCAST IP PHONE, LLC | 318J | PHOENIX | AZ |
| 2018-04-18 | 623-231-7XXX | 7000–7999 | Assigned | COMCAST IP PHONE, LLC | 318J | PHOENIX | AZ |
| 2018-04-11 | 623-231-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | PHOENIX | AZ |
| 2018-04-11 | 623-231-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | PHOENIX | AZ |
| 2018-04-10 | 623-231-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | PHOENIX | AZ |
| 2018-04-10 | 623-231-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | PHOENIX | AZ |
| 2018-03-30 | 623-231-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AZ | 3285 | PHOENIX | AZ |
| 2018-03-30 | 623-231-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AZ | 3285 | PHOENIX | AZ |
| 2018-03-27 | 623-289-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AZ | 3285 | PHOENIX | AZ |
| 2018-03-27 | 623-289-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AZ | 3285 | PHOENIX | AZ |
| 2018-02-28 | 623-289-6XXX | 6000–6999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | PHOENIX | AZ |
| 2018-02-08 | 623-289-7XXX | 7000–7999 | Assigned | COMCAST IP PHONE, LLC | 318J | PHOENIX | AZ |
| 2018-01-30 | 623-289-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | 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.