NumberResearchThousands-blocks in 224-875
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 224-875 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 224 blocks
Most active assignees, all time — NPA 224
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 224-875-0XXX | 0000–0999 | Reserved | T-MOBILE USA, INC. | 6529 | ELK GROVE | IL |
| — | 224-875-1XXX | 1000–1999 | Reserved | T-MOBILE USA, INC. | 6529 | ELK GROVE | IL |
| — | 224-875-2XXX | 2000–2999 | Reserved | T-MOBILE USA, INC. | 6529 | ELK GROVE | IL |
| 2009-07-13 | 224-875-3XXX | 3000–3999 | Assigned | ONVOY, LLC | 224C | ELK GROVE | IL |
| — | 224-875-4XXX | 4000–4999 | Reserved | T-MOBILE USA, INC. | 6529 | ELK GROVE | IL |
| — | 224-875-5XXX | 5000–5999 | Reserved | T-MOBILE USA, INC. | 6529 | ELK GROVE | IL |
| 2012-10-16 | 224-875-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | ELK GROVE | IL |
| 2005-04-07 | 224-875-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ELK GROVE | IL |
| — | 224-875-8XXX | 8000–8999 | Reserved | T-MOBILE USA, INC. | 6529 | ELK GROVE | IL |
| — | 224-875-9XXX | 9000–9999 | Reserved | T-MOBILE USA, INC. | 6529 | ELK GROVE | 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.