NumberResearchThousands-blocks in 815-450
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/20/2026
The ten 1,000-number thousand-blocks inside prefix 815-450 and who was initially assigned each. Under pooling these blocks often belong to different carriers — the single prefix-level “assignee” is usually just the pool / code holder, not who holds the numbers. ← all 815 blocks
Most active assignees, all time — NPA 815
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2004-08-03 | 815-450-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MOMENCE | IL |
| 2004-08-03 | 815-450-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MOMENCE | IL |
| 2006-06-22 | 815-450-2XXX | 2000–2999 | Assigned | ACCESS ONE, INC. - IL | 5447 | MOMENCE | IL |
| 2009-08-13 | 815-450-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MOMENCE | IL |
| 2018-08-23 | 815-450-4XXX | 4000–4999 | Assigned | ONVOY, LLC | 224C | MOMENCE | IL |
| 2010-08-13 | 815-450-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MOMENCE | IL |
| 2010-01-21 | 815-450-6XXX | 6000–6999 | Assigned | MCC TELEPHONY LLC | 593K | MOMENCE | IL |
| 2009-01-23 | 815-450-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MOMENCE | IL |
| 2009-01-23 | 815-450-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MOMENCE | IL |
| 2008-11-14 | 815-450-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - IL | 984E | MOMENCE | 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.