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.
Most active assignees, all time — NPA 309
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2010-06-30 | 309-548-1XXX | 1000–1999 | Assigned | MCC TELEPHONY LLC | 593K | ROSEVILLE | IL |
| 2010-06-30 | 309-599-8XXX | 8000–8999 | Assigned | MCC TELEPHONY LLC | 593K | LONDON ML | IL |
| 2010-06-30 | 309-609-9XXX | 9000–9999 | Assigned | MCC TELEPHONY LLC | 593K | ALTONA | IL |
| 2010-06-30 | 309-616-9XXX | 9000–9999 | Assigned | MCC TELEPHONY LLC | 593K | WILLIMSFLD | IL |
| 2010-06-30 | 309-703-1XXX | 1000–1999 | Assigned | MCC TELEPHONY LLC | 593K | ABINGDON | IL |
| 2010-06-30 | 309-801-1XXX | 1000–1999 | Assigned | MCC TELEPHONY LLC | 593K | STRONGHST | IL |
| 2010-06-30 | 309-817-2XXX | 2000–2999 | Assigned | MCC TELEPHONY LLC | 593K | MAQUON | IL |
| 2010-06-30 | 309-955-0XXX | 0000–0999 | Assigned | MCC TELEPHONY LLC | 593K | WATAGA | IL |
| 2010-06-30 | 309-975-1XXX | 1000–1999 | Assigned | MCC TELEPHONY LLC | 593K | AVON | IL |
| 2010-06-30 | 309-997-1XXX | 1000–1999 | Assigned | MCC TELEPHONY LLC | 593K | GOOD HOPE | IL |
| 2010-05-20 | 309-775-0XXX | 0000–0999 | Assigned | MCC TELEPHONY LLC | 593K | PRAIRIE CY | IL |
| 2010-05-20 | 309-973-0XXX | 0000–0999 | Assigned | MCC TELEPHONY LLC | 593K | GALESBURG | 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.