NumberResearchThousands-blocks in 440-710
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 440-710 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
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 440-710-0XXX | 0000–0999 | Reserved | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | WILLOUGHBY | OH |
| 2025-03-10 | 440-710-1XXX | 1000–1999 | Assigned | TERRA NOVA TELECOM INC. | 145J | WILLOUGHBY | OH |
| 2024-11-12 | 440-710-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | WILLOUGHBY | OH |
| — | 440-710-3XXX | 3000–3999 | Reserved | ONVOY, LLC - OH | 464C | WILLOUGHBY | OH |
| 2009-09-04 | 440-710-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH | 6025 | WILLOUGHBY | OH |
| — | 440-710-5XXX | 5000–5999 | Reserved | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | WILLOUGHBY | OH |
| 2017-10-10 | 440-710-6XXX | 6000–6999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | WILLOUGHBY | OH |
| 2018-10-08 | 440-710-7XXX | 7000–7999 | Assigned | SIGECOM, LLC DBA WOW INTERNET CABLE AND PHONE | 735E | WILLOUGHBY | OH |
| 2018-10-29 | 440-710-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | WILLOUGHBY | OH |
| 2024-11-12 | 440-710-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | WILLOUGHBY | OH |
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.