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 815
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2010-07-01 | 815-500-9XXX | 9000–9999 | Assigned | MCC TELEPHONY LLC | 593K | MARSEILLES | IL |
| 2010-06-01 | 815-429-6XXX | 6000–6999 | Assigned | MCC TELEPHONY LLC | 593K | SHELDON | IL |
| 2010-06-01 | 815-473-0XXX | 0000–0999 | Assigned | MCC TELEPHONY LLC | 593K | WOODLAND | IL |
| 2010-05-18 | 815-495-0XXX | 0000–0999 | Assigned | MCC TELEPHONY LLC | 593K | LELAND | IL |
| 2010-05-18 | 815-648-7XXX | 7000–7999 | Assigned | MCC TELEPHONY LLC | 593K | HEBRON | IL |
| 2010-05-18 | 815-728-3XXX | 3000–3999 | Assigned | MCC TELEPHONY LLC | 593K | WONDERLAKE | IL |
| 2010-05-17 | 815-496-7XXX | 7000–7999 | Assigned | MCC TELEPHONY LLC | 593K | SHERIDAN | IL |
| 2010-05-17 | 815-560-9XXX | 9000–9999 | Assigned | MCC TELEPHONY LLC | 593K | HARVARD | IL |
| 2010-05-17 | 815-581-3XXX | 3000–3999 | Assigned | MCC TELEPHONY LLC | 593K | SPRING GRV | IL |
| 2010-05-17 | 815-797-1XXX | 1000–1999 | Assigned | MCC TELEPHONY LLC | 593K | SOMONAUK | IL |
| 2010-05-17 | 815-862-0XXX | 0000–0999 | Assigned | MCC TELEPHONY LLC | 593K | RICHMOND | IL |
| 2010-05-13 | 815-339-1XXX | 1000–1999 | Assigned | MCC TELEPHONY LLC | 593K | GRANVILLE | IL |
| 2010-03-24 | 815-884-1XXX | 1000–1999 | Assigned | MCC TELEPHONY LLC | 593K | EARLVILLE | IL |
| 2010-01-21 | 815-305-3XXX | 3000–3999 | Assigned | MCC TELEPHONY LLC | 593K | GARDNER | IL |
| 2010-01-21 | 815-390-2XXX | 2000–2999 | Assigned | MCC TELEPHONY LLC | 593K | BRAIDWOOD | IL |
| 2010-01-21 | 815-432-1XXX | 1000–1999 | Assigned | MCC TELEPHONY LLC | 593K | WATSEKA | IL |
| 2010-01-21 | 815-450-6XXX | 6000–6999 | Assigned | MCC TELEPHONY LLC | 593K | MOMENCE | IL |
| 2010-01-21 | 815-466-4XXX | 4000–4999 | Assigned | MCC TELEPHONY LLC | 593K | GRANT PARK | IL |
| 2010-01-21 | 815-584-5XXX | 5000–5999 | Assigned | MCC TELEPHONY LLC | 593K | DWIGHT | IL |
| 2010-01-21 | 815-683-1XXX | 1000–1999 | Assigned | MCC TELEPHONY LLC | 593K | CRESCENTCY | IL |
| 2010-01-11 | 815-324-9XXX | 9000–9999 | Assigned | MCC TELEPHONY LLC | 593K | OTTAWA | IL |
| 2005-04-18 | 815-313-5XXX | 5000–5999 | Assigned | MCC TELEPHONY LLC | 593K | OTTAWA | IL |
| 2005-04-18 | 815-675-5XXX | 5000–5999 | Assigned | MCC TELEPHONY LLC | 593K | SPRING GRV | 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.