NumberResearchRecent thousands-block assignments
0 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.
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2025-04-10 | 618-300-2XXX | 2000–2999 | Assigned | NUSO, LLC | 732J | CARBONDALE | IL |
| 2023-11-09 | 618-908-5XXX | 5000–5999 | Assigned | NUSO, LLC | 478J | ALTON | IL |
| 2023-08-05 | 618-561-7XXX | 7000–7999 | Assigned | NUSO, LLC | 732J | CARBONDALE | IL |
| 2023-02-08 | 618-916-1XXX | 1000–1999 | Assigned | NUSO, LLC | 732J | HERRIN | IL |
| 2020-09-04 | 618-636-1XXX | 1000–1999 | Assigned | NUSO, LLC | 478J | ALTON | IL |
| 2016-03-03 | 618-516-5XXX | 5000–5999 | Assigned | NUSO, LLC | 478J | FAIRFIELD | IL |
| 2016-03-03 | 618-723-5XXX | 5000–5999 | Assigned | NUSO, LLC | 478J | NOBLE | IL |
| 2016-03-03 | 618-895-5XXX | 5000–5999 | Assigned | NUSO, LLC | 478J | WAYNE CITY | IL |
| 2016-02-15 | 618-403-5XXX | 5000–5999 | Assigned | NUSO, LLC | 478J | FLORA | IL |
| 2013-04-04 | 618-879-3XXX | 3000–3999 | Assigned | NUSO, LLC | 551G | OLNEY | IL |
| 2013-03-20 | 618-605-1XXX | 1000–1999 | Assigned | NUSO, LLC | 551G | CARBONDALE | IL |
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.