NumberResearchThousands-blocks in 484-428
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 484-428 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
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2014-12-29 | 484-428-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | PHPHSBZN22 | PA |
| — | 484-428-1XXX | 1000–1999 | Available | PHPHSBZN22 | PA | ||
| — | 484-428-2XXX | 2000–2999 | Available | PHPHSBZN22 | PA | ||
| 2014-06-10 | 484-428-3XXX | 3000–3999 | Assigned | COMCAST IP PHONE, LLC | 318J | PHPHSBZN22 | PA |
| 2021-04-15 | 484-428-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | PHPHSBZN22 | PA |
| 2021-11-09 | 484-428-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | PHPHSBZN22 | PA |
| 2015-04-03 | 484-428-6XXX | 6000–6999 | Assigned | ONVOY, LLC - PA | 547E | PHPHSBZN22 | PA |
| 2014-03-04 | 484-428-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | PHPHSBZN22 | PA |
| 2014-12-29 | 484-428-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | PHPHSBZN22 | PA |
| — | 484-428-9XXX | 9000–9999 | Available | PHPHSBZN22 | PA |
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.