NumberResearchThousands-blocks in 484-855
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 484-855 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 484 blocks
Most active assignees, all time — NPA 484
New assignments by month
Sep 2026
Aug 2026
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Dec 2025
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2009-01-07 | 484-855-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | READING | PA |
| 2009-09-29 | 484-855-1XXX | 1000–1999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | READING | PA |
| 2009-03-31 | 484-855-2XXX | 2000–2999 | Assigned | LIMITLESS MOBILE, LLC | 6921 | READING | PA |
| 2008-12-03 | 484-855-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | READING | PA |
| 2009-03-31 | 484-855-4XXX | 4000–4999 | Assigned | LIMITLESS MOBILE, LLC | 6921 | READING | PA |
| 2009-03-31 | 484-855-5XXX | 5000–5999 | Assigned | LIMITLESS MOBILE, LLC | 6921 | READING | PA |
| 2009-09-03 | 484-855-6XXX | 6000–6999 | Assigned | LIMITLESS MOBILE, LLC | 6921 | READING | PA |
| 2009-09-03 | 484-855-7XXX | 7000–7999 | Assigned | LIMITLESS MOBILE, LLC | 6921 | READING | PA |
| 2008-09-17 | 484-855-8XXX | 8000–8999 | Assigned | D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE | 6846 | READING | PA |
| 2008-09-17 | 484-855-9XXX | 9000–9999 | Assigned | D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE | 6846 | READING | PA |
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.