NumberResearchThousands-blocks in 847-321
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/19/2026
The ten 1,000-number thousand-blocks inside prefix 847-321 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 847 blocks
Most active assignees, all time — NPA 847
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2003-04-18 | 847-321-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | DESPLAINES | IL |
| 2003-07-03 | 847-321-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | DESPLAINES | IL |
| 2003-04-18 | 847-321-2XXX | 2000–2999 | Assigned | ILLINOIS BELL TEL CO | 9329 | DESPLAINES | IL |
| — | 847-321-3XXX | 3000–3999 | Reserved | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | 7136 | DESPLAINES | IL |
| 2001-03-12 | 847-321-4XXX | 4000–4999 | Assigned | ILLINOIS BELL TEL CO | 9329 | DESPLAINES | IL |
| 2004-10-19 | 847-321-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | DESPLAINES | IL |
| 2002-02-19 | 847-321-6XXX | 6000–6999 | Assigned | ILLINOIS BELL TEL CO | 9329 | DESPLAINES | IL |
| 2019-06-10 | 847-321-7XXX | 7000–7999 | Assigned | ONVOY, LLC | 224C | DESPLAINES | IL |
| 2003-07-03 | 847-321-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | DESPLAINES | IL |
| 2005-09-01 | 847-321-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | DESPLAINES | IL |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.