NumberResearchRecent thousands-block assignments
19 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 557
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2023-09-07 | 557-208-3XXX | 3000–3999 | Assigned | ONVOY, LLC - MO | 093F | LADUE | MO |
| 2023-09-07 | 557-208-4XXX | 4000–4999 | Assigned | ONVOY, LLC - MO | 093F | LADUE | MO |
| 2023-09-07 | 557-208-5XXX | 5000–5999 | Assigned | ONVOY, LLC - MO | 093F | LADUE | MO |
| 2023-09-01 | 557-201-8XXX | 8000–8999 | Assigned | ONVOY, LLC - MO | 093F | KIRKWOOD | MO |
| 2023-09-01 | 557-999-5XXX | 5000–5999 | Assigned | ONVOY, LLC - MO | 093F | SAPPINGTON | MO |
| 2023-08-31 | 557-999-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - MO | 7218 | SAPPINGTON | MO |
| 2023-08-30 | 557-777-5XXX | 5000–5999 | Assigned | TELNYX LLC | 073H | CREVECOEUR | MO |
| 2023-08-16 | 557-507-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | ST LOUIS | MO |
| 2023-08-16 | 557-507-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | ST LOUIS | MO |
| 2023-08-16 | 557-507-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | ST LOUIS | MO |
| 2023-08-16 | 557-507-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | ST LOUIS | MO |
| 2023-08-16 | 557-507-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | ST LOUIS | MO |
| 2023-08-16 | 557-507-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | ST LOUIS | MO |
| 2023-08-16 | 557-507-6XXX | 6000–6999 | Assigned | ONVOY SPECTRUM, LLC | 624H | ST LOUIS | MO |
| 2023-08-16 | 557-507-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | ST LOUIS | MO |
| 2023-08-16 | 557-507-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | ST LOUIS | MO |
| 2023-08-16 | 557-507-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | ST LOUIS | MO |
| 2023-08-11 | 557-777-3XXX | 3000–3999 | Assigned | ONVOY, LLC - MO | 093F | CREVECOEUR | MO |
| 2023-08-11 | 557-777-4XXX | 4000–4999 | Assigned | ONVOY, LLC - MO | 093F | CREVECOEUR | MO |
| 2023-08-07 | 557-203-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MEHLVILLE | MO |
| 2023-08-07 | 557-204-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ST LOUIS | MO |
| 2023-08-07 | 557-222-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ST LOUIS | MO |
| 2023-08-02 | 557-202-8XXX | 8000–8999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | ST LOUIS | MO |
| 2023-07-26 | 557-777-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CREVECOEUR | MO |
| 2023-07-13 | 557-201-1XXX | 1000–1999 | Assigned | ONVOY, LLC - MO | 093F | KIRKWOOD | MO |
| 2023-07-13 | 557-201-4XXX | 4000–4999 | Assigned | ONVOY, LLC - MO | 093F | KIRKWOOD | MO |
| 2023-07-13 | 557-203-0XXX | 0000–0999 | Assigned | ONVOY, LLC - MO | 093F | MEHLVILLE | MO |
| 2023-07-13 | 557-203-1XXX | 1000–1999 | Assigned | ONVOY, LLC - MO | 093F | MEHLVILLE | MO |
| 2023-07-13 | 557-203-5XXX | 5000–5999 | Assigned | ONVOY, LLC - MO | 093F | MEHLVILLE | MO |
| 2023-07-13 | 557-777-2XXX | 2000–2999 | Assigned | ONVOY, LLC - MO | 093F | CREVECOEUR | MO |
| 2023-07-13 | 557-999-4XXX | 4000–4999 | Assigned | ONVOY, LLC - MO | 093F | SAPPINGTON | MO |
| 2023-06-22 | 557-557-0XXX | 0000–0999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO | 7432 | ST LOUIS | MO |
| 2023-06-22 | 557-557-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO | 7432 | ST LOUIS | MO |
| 2023-06-15 | 557-207-0XXX | 0000–0999 | Assigned | FIVE9, INC. | 598J | OAKVILLE | MO |
| 2023-06-15 | 557-999-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | SAPPINGTON | MO |
| 2023-06-12 | 557-203-2XXX | 2000–2999 | Assigned | ONVOY, LLC - MO | 093F | MEHLVILLE | MO |
| 2023-06-12 | 557-203-3XXX | 3000–3999 | Assigned | ONVOY, LLC - MO | 093F | MEHLVILLE | MO |
| 2023-06-12 | 557-203-4XXX | 4000–4999 | Assigned | ONVOY, LLC - MO | 093F | MEHLVILLE | MO |
| 2023-06-06 | 557-202-9XXX | 9000–9999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - MO | 7218 | ST LOUIS | MO |
| 2023-06-01 | 557-202-3XXX | 3000–3999 | Assigned | ONVOY, LLC - MO | 093F | ST LOUIS | MO |
| 2023-06-01 | 557-202-4XXX | 4000–4999 | Assigned | ONVOY, LLC - MO | 093F | ST LOUIS | MO |
| 2023-06-01 | 557-202-5XXX | 5000–5999 | Assigned | ONVOY, LLC - MO | 093F | ST LOUIS | MO |
| 2023-06-01 | 557-205-0XXX | 0000–0999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - MO | 7218 | ST LOUIS | MO |
| 2023-06-01 | 557-205-1XXX | 1000–1999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - MO | 7218 | ST LOUIS | MO |
| 2023-06-01 | 557-205-2XXX | 2000–2999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - MO | 7218 | ST LOUIS | MO |
| 2023-06-01 | 557-205-3XXX | 3000–3999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - MO | 7218 | ST LOUIS | MO |
| 2023-06-01 | 557-205-4XXX | 4000–4999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - MO | 7218 | ST LOUIS | MO |
| 2023-06-01 | 557-205-5XXX | 5000–5999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - MO | 7218 | ST LOUIS | MO |
| 2023-06-01 | 557-205-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - MO | 7218 | ST LOUIS | MO |
| 2023-06-01 | 557-205-7XXX | 7000–7999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - MO | 7218 | ST LOUIS | MO |
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.