NumberResearchRecent thousands-block assignments
5 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 520
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 |
|---|---|---|---|---|---|---|---|
| 2012-12-26 | 520-727-8XXX | 8000–8999 | Assigned | ONVOY, LLC - AZ | 630E | DOUGLAS | AZ |
| 2012-12-26 | 520-727-9XXX | 9000–9999 | Assigned | ONVOY, LLC - AZ | 630E | DOUGLAS | AZ |
| 2012-12-17 | 520-433-3XXX | 3000–3999 | Assigned | ONVOY, LLC - AZ | 630E | TUCSON | AZ |
| 2012-12-17 | 520-433-5XXX | 5000–5999 | Assigned | ONVOY, LLC - AZ | 630E | TUCSON | AZ |
| 2012-12-17 | 520-433-6XXX | 6000–6999 | Assigned | ONVOY, LLC - AZ | 630E | TUCSON | AZ |
| 2012-12-17 | 520-433-7XXX | 7000–7999 | Assigned | ONVOY, LLC - AZ | 630E | TUCSON | AZ |
| 2012-12-17 | 520-433-8XXX | 8000–8999 | Assigned | ONVOY, LLC - AZ | 630E | TUCSON | AZ |
| 2012-12-14 | 520-394-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AZ | 3285 | NOGALES | AZ |
| 2012-12-11 | 520-337-5XXX | 5000–5999 | Assigned | ONVOY, LLC - AZ | 630E | WILLCOX | AZ |
| 2012-12-11 | 520-337-6XXX | 6000–6999 | Assigned | ONVOY, LLC - AZ | 630E | WILLCOX | AZ |
| 2012-12-11 | 520-337-7XXX | 7000–7999 | Assigned | ONVOY, LLC - AZ | 630E | WILLCOX | AZ |
| 2012-12-11 | 520-337-8XXX | 8000–8999 | Assigned | ONVOY, LLC - AZ | 630E | WILLCOX | AZ |
| 2012-12-11 | 520-337-9XXX | 9000–9999 | Assigned | ONVOY, LLC - AZ | 630E | WILLCOX | AZ |
| 2012-12-11 | 520-391-2XXX | 2000–2999 | Assigned | ONVOY, LLC - AZ | 630E | SUPERIOR | AZ |
| 2012-12-11 | 520-391-5XXX | 5000–5999 | Assigned | ONVOY, LLC - AZ | 630E | SUPERIOR | AZ |
| 2012-12-11 | 520-487-5XXX | 5000–5999 | Assigned | ONVOY, LLC - AZ | 630E | SAN MANUEL | AZ |
| 2012-12-11 | 520-487-6XXX | 6000–6999 | Assigned | ONVOY, LLC - AZ | 630E | SAN MANUEL | AZ |
| 2012-12-11 | 520-487-7XXX | 7000–7999 | Assigned | ONVOY, LLC - AZ | 630E | SAN MANUEL | AZ |
| 2012-12-10 | 520-484-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | TUCSON | AZ |
| 2012-12-10 | 520-484-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | TUCSON | AZ |
| 2012-12-10 | 520-484-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | TUCSON | AZ |
| 2012-12-10 | 520-484-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | TUCSON | AZ |
| 2012-12-10 | 520-484-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | TUCSON | AZ |
| 2012-11-30 | 520-487-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | SAN MANUEL | AZ |
| 2012-11-26 | 520-433-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AZ | 3285 | TUCSON | AZ |
| 2012-11-19 | 520-253-4XXX | 4000–4999 | Assigned | ONVOY, LLC - AZ | 630E | WILLCOX | AZ |
| 2012-11-19 | 520-253-5XXX | 5000–5999 | Assigned | ONVOY, LLC - AZ | 630E | WILLCOX | AZ |
| 2012-11-19 | 520-253-6XXX | 6000–6999 | Assigned | ONVOY, LLC - AZ | 630E | WILLCOX | AZ |
| 2012-11-19 | 520-253-7XXX | 7000–7999 | Assigned | ONVOY, LLC - AZ | 630E | WILLCOX | AZ |
| 2012-11-19 | 520-422-4XXX | 4000–4999 | Assigned | ONVOY, LLC - AZ | 630E | BISBEE | AZ |
| 2012-11-19 | 520-422-5XXX | 5000–5999 | Assigned | ONVOY, LLC - AZ | 630E | BISBEE | AZ |
| 2012-11-19 | 520-422-6XXX | 6000–6999 | Assigned | ONVOY, LLC - AZ | 630E | BISBEE | AZ |
| 2012-11-19 | 520-727-3XXX | 3000–3999 | Assigned | ONVOY, LLC - AZ | 630E | DOUGLAS | AZ |
| 2012-11-19 | 520-727-4XXX | 4000–4999 | Assigned | ONVOY, LLC - AZ | 630E | DOUGLAS | AZ |
| 2012-11-19 | 520-727-5XXX | 5000–5999 | Assigned | ONVOY, LLC - AZ | 630E | DOUGLAS | AZ |
| 2012-11-19 | 520-727-6XXX | 6000–6999 | Assigned | ONVOY, LLC - AZ | 630E | DOUGLAS | AZ |
| 2012-11-16 | 520-373-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2012-11-16 | 520-373-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2012-11-16 | 520-373-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2012-11-16 | 520-474-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | TUCSON | AZ |
| 2012-11-16 | 520-474-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | TUCSON | AZ |
| 2012-11-16 | 520-474-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | TUCSON | AZ |
| 2012-11-16 | 520-474-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | TUCSON | AZ |
| 2012-11-16 | 520-474-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | TUCSON | AZ |
| 2012-11-16 | 520-474-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | TUCSON | AZ |
| 2012-11-16 | 520-474-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | TUCSON | AZ |
| 2012-11-16 | 520-474-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | TUCSON | AZ |
| 2012-11-16 | 520-474-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | TUCSON | AZ |
| 2012-11-16 | 520-484-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2012-11-16 | 520-484-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | 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.