NumberResearchThousands-blocks in 440-307
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 440-307 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
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2018-12-11 | 440-307-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH | 6025 | MADISON | OH |
| 2014-10-23 | 440-307-1XXX | 1000–1999 | Assigned | ONVOY, LLC - OH | 464C | MADISON | OH |
| 2021-01-04 | 440-307-2XXX | 2000–2999 | Assigned | ONVOY, LLC - OH | 464C | MADISON | OH |
| 2011-09-19 | 440-307-3XXX | 3000–3999 | Assigned | WINDSTREAM WESTERN RESERVE, INC. | 0666 | MADISON | OH |
| 2016-06-09 | 440-307-4XXX | 4000–4999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | MADISON | OH |
| 2019-12-10 | 440-307-5XXX | 5000–5999 | Assigned | ONVOY, LLC - OH | 464C | MADISON | OH |
| 2013-07-16 | 440-307-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - OH | 7532 | MADISON | OH |
| 2015-07-28 | 440-307-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | MADISON | OH |
| 2019-12-10 | 440-307-8XXX | 8000–8999 | Assigned | ONVOY, LLC - OH | 464C | MADISON | OH |
| 2013-06-26 | 440-307-9XXX | 9000–9999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | MADISON | 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.