NumberResearchRecent thousands-block assignments
19 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026
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
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2025-07-15 | 557-333-3XXX | 3000–3999 | Assigned | ONVOY, LLC - MO | 093F | SAPPINGTON | MO |
| 2025-07-15 | 557-333-4XXX | 4000–4999 | Assigned | ONVOY, LLC - MO | 093F | SAPPINGTON | MO |
| 2025-07-15 | 557-444-0XXX | 0000–0999 | Assigned | ONVOY, LLC - MO | 093F | CREVECOEUR | MO |
| 2025-07-15 | 557-444-4XXX | 4000–4999 | Assigned | ONVOY, LLC - MO | 093F | CREVECOEUR | MO |
| 2025-07-15 | 557-444-5XXX | 5000–5999 | Assigned | ONVOY, LLC - MO | 093F | CREVECOEUR | MO |
| 2025-07-03 | 557-222-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ST LOUIS | MO |
| 2025-07-03 | 557-234-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ST LOUIS | MO |
| 2025-07-03 | 557-234-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ST LOUIS | MO |
| 2025-06-20 | 557-238-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | KIRKWOOD | MO |
| 2025-06-20 | 557-238-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | KIRKWOOD | MO |
| 2025-06-20 | 557-238-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | KIRKWOOD | MO |
| 2025-06-20 | 557-238-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | KIRKWOOD | MO |
| 2025-06-20 | 557-238-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | KIRKWOOD | MO |
| 2025-06-20 | 557-238-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | KIRKWOOD | MO |
| 2025-06-20 | 557-238-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | KIRKWOOD | MO |
| 2025-06-16 | 557-219-2XXX | 2000–2999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | LADUE | MO |
| 2025-06-10 | 557-226-4XXX | 4000–4999 | Assigned | NUSO, LLC | 732J | CREVECOEUR | MO |
| 2025-06-09 | 557-234-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ST LOUIS | MO |
| 2025-06-09 | 557-234-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ST LOUIS | MO |
| 2025-06-09 | 557-234-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ST LOUIS | MO |
| 2025-06-06 | 557-219-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LADUE | MO |
| 2025-06-06 | 557-219-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LADUE | MO |
| 2025-06-06 | 557-219-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LADUE | MO |
| 2025-06-06 | 557-237-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LADUE | MO |
| 2025-06-06 | 557-237-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LADUE | MO |
| 2025-06-06 | 557-237-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LADUE | MO |
| 2025-06-06 | 557-237-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LADUE | MO |
| 2025-06-06 | 557-237-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LADUE | MO |
| 2025-06-06 | 557-237-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LADUE | MO |
| 2025-06-06 | 557-237-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LADUE | MO |
| 2025-05-23 | 557-232-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LADUE | MO |
| 2025-05-23 | 557-237-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LADUE | MO |
| 2025-05-23 | 557-237-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LADUE | MO |
| 2025-05-23 | 557-237-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LADUE | MO |
| 2025-05-20 | 557-203-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | MEHLVILLE | MO |
| 2025-05-16 | 557-235-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | KIRKWOOD | MO |
| 2025-05-16 | 557-235-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | KIRKWOOD | MO |
| 2025-05-16 | 557-235-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | KIRKWOOD | MO |
| 2025-05-16 | 557-235-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | KIRKWOOD | MO |
| 2025-05-16 | 557-235-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | KIRKWOOD | MO |
| 2025-05-15 | 557-234-3XXX | 3000–3999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - MO | 7218 | ST LOUIS | MO |
| 2025-05-15 | 557-234-4XXX | 4000–4999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - MO | 7218 | ST LOUIS | MO |
| 2025-05-09 | 557-212-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MEHLVILLE | MO |
| 2025-04-24 | 557-236-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO | 5814 | LADUE | MO |
| 2025-04-24 | 557-236-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO | 5814 | LADUE | MO |
| 2025-04-24 | 557-236-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO | 5814 | LADUE | MO |
| 2025-04-24 | 557-236-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO | 5814 | LADUE | MO |
| 2025-04-24 | 557-236-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO | 5814 | LADUE | MO |
| 2025-04-24 | 557-236-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO | 5814 | LADUE | MO |
| 2025-04-24 | 557-236-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO | 5814 | LADUE | MO |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.