NumberResearchThousands-blocks in 479-657
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 479-657 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 479 blocks
Most active assignees, all time — NPA 479
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2014-05-27 | 479-657-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | BENTONVL | AR |
| 2014-05-27 | 479-657-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | BENTONVL | AR |
| 2010-02-26 | 479-657-2XXX | 2000–2999 | Assigned | COMCAST IP PHONE, LLC | 318J | BENTONVL | AR |
| 2014-05-27 | 479-657-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | BENTONVL | AR |
| — | 479-657-4XXX | 4000–4999 | Reserved | AT&T - LOCAL | 7421 | BENTONVL | AR |
| 2011-01-05 | 479-657-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | BENTONVL | AR |
| 2006-01-24 | 479-657-6XXX | 6000–6999 | Assigned | COMCAST IP PHONE, LLC | 318J | BENTONVL | AR |
| — | 479-657-7XXX | 7000–7999 | Reserved | AT&T - LOCAL | 7421 | BENTONVL | AR |
| 2011-01-05 | 479-657-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | BENTONVL | AR |
| — | 479-657-9XXX | 9000–9999 | Reserved | AT&T - LOCAL | 7421 | BENTONVL | AR |
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.