NumberResearchRecent thousands-block assignments
22 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 559
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 |
|---|---|---|---|---|---|---|---|
| 2021-09-29 | 559-338-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | DUNLAP | CA |
| 2021-09-29 | 559-910-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | GRANTGROVE | CA |
| 2021-09-24 | 559-990-0XXX | 0000–0999 | Assigned | SKYE TELECOM LLC DBA SKYETEL | 622J | SANGER | CA |
| 2021-09-22 | 559-949-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | ALPAUGH | CA |
| 2021-09-22 | 559-949-1XXX | 1000–1999 | Assigned | COMMIO, LLC | 939H | ALPAUGH | CA |
| 2021-09-22 | 559-949-2XXX | 2000–2999 | Assigned | COMMIO, LLC | 939H | ALPAUGH | CA |
| 2021-09-22 | 559-949-3XXX | 3000–3999 | Assigned | COMMIO, LLC | 939H | ALPAUGH | CA |
| 2021-09-21 | 559-629-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | FRESNO | CA |
| 2021-09-13 | 559-610-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | VISALIA | CA |
| 2021-09-13 | 559-610-1XXX | 1000–1999 | Assigned | COMMIO, LLC | 939H | VISALIA | CA |
| 2021-09-13 | 559-610-2XXX | 2000–2999 | Assigned | COMMIO, LLC | 939H | VISALIA | CA |
| 2021-09-13 | 559-629-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | FRESNO | CA |
| 2021-09-10 | 559-388-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | FRESNO | CA |
| 2021-09-10 | 559-420-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | FRESNO | CA |
| 2021-09-10 | 559-944-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | FRESNO | CA |
| 2021-09-10 | 559-944-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | FRESNO | CA |
| 2021-09-10 | 559-944-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | FRESNO | CA |
| 2021-09-10 | 559-944-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | FRESNO | CA |
| 2021-09-10 | 559-944-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | FRESNO | CA |
| 2021-09-08 | 559-220-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | LEMOORE | CA |
| 2021-09-08 | 559-220-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | LEMOORE | CA |
| 2021-09-08 | 559-220-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | LEMOORE | CA |
| 2021-09-08 | 559-482-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | BURREL | CA |
| 2021-09-08 | 559-482-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | BURREL | CA |
| 2021-09-07 | 559-564-5XXX | 5000–5999 | Assigned | TERRA NOVA TELECOM INC. | 145J | WOODLAKE | CA |
| 2021-09-07 | 559-634-7XXX | 7000–7999 | Assigned | TERRA NOVA TELECOM INC. | 145J | KINGSBURG | CA |
| 2021-09-07 | 559-659-7XXX | 7000–7999 | Assigned | TERRA NOVA TELECOM INC. | 145J | FIREBAUGH | CA |
| 2021-09-07 | 559-752-3XXX | 3000–3999 | Assigned | TERRA NOVA TELECOM INC. | 145J | TIPTON | CA |
| 2021-09-07 | 559-867-2XXX | 2000–2999 | Assigned | TERRA NOVA TELECOM INC. | 145J | RIVERDALE | CA |
| 2021-09-07 | 559-884-0XXX | 0000–0999 | Assigned | TERRA NOVA TELECOM INC. | 145J | BURREL | CA |
| 2021-09-07 | 559-888-0XXX | 0000–0999 | Assigned | TERRA NOVA TELECOM INC. | 145J | DEL REY | CA |
| 2021-09-07 | 559-945-3XXX | 3000–3999 | Assigned | TERRA NOVA TELECOM INC. | 145J | HURON | CA |
| 2021-09-01 | 559-383-9XXX | 9000–9999 | Assigned | TELNYX LLC | 073H | AVENAL | CA |
| 2021-08-31 | 559-238-2XXX | 2000–2999 | Assigned | SKYE TELECOM LLC DBA SKYETEL | 622J | KINGSBURG | CA |
| 2021-08-31 | 559-610-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | VISALIA | CA |
| 2021-08-31 | 559-610-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | VISALIA | CA |
| 2021-08-31 | 559-610-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | VISALIA | CA |
| 2021-08-31 | 559-610-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | VISALIA | CA |
| 2021-08-31 | 559-610-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | VISALIA | CA |
| 2021-08-31 | 559-610-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | VISALIA | CA |
| 2021-08-31 | 559-610-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | VISALIA | CA |
| 2021-08-31 | 559-620-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SELMA | CA |
| 2021-08-27 | 559-557-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | VISALIA | CA |
| 2021-08-27 | 559-557-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | VISALIA | CA |
| 2021-08-27 | 559-557-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | VISALIA | CA |
| 2021-08-27 | 559-557-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | VISALIA | CA |
| 2021-08-27 | 559-590-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DINUBA | CA |
| 2021-08-27 | 559-613-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MADERA | CA |
| 2021-08-27 | 559-613-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MADERA | CA |
| 2021-08-27 | 559-946-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | VISALIA | CA |
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.