NumberResearchThousands-blocks in 440-279
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 440-279 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 440 blocks
Most active assignees, all time — NPA 440
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 440-279-0XXX | 0000–0999 | Reserved | WINDSTREAM WESTERN RESERVE, INC. | 0666 | CHARDON | OH |
| — | 440-279-1XXX | 1000–1999 | Reserved | WINDSTREAM WESTERN RESERVE, INC. | 0666 | CHARDON | OH |
| — | 440-279-2XXX | 2000–2999 | Reserved | WINDSTREAM WESTERN RESERVE, INC. | 0666 | CHARDON | OH |
| 2003-04-14 | 440-279-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CHARDON | OH |
| 2007-01-09 | 440-279-4XXX | 4000–4999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | CHARDON | OH |
| 2018-03-23 | 440-279-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CHARDON | OH |
| 2015-07-28 | 440-279-6XXX | 6000–6999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | CHARDON | OH |
| 2004-07-16 | 440-279-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CHARDON | OH |
| 2011-05-12 | 440-279-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CHARDON | OH |
| — | 440-279-9XXX | 9000–9999 | Reserved | WINDSTREAM WESTERN RESERVE, INC. | 0666 | CHARDON | OH |
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.