NumberResearchThousands-blocks in 850-306
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 850-306 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 850 blocks
Most active assignees, all time — NPA 850
New assignments by month
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2009-01-12 | 850-306-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - FL | 982E | CRESTVIEW | FL |
| — | 850-306-1XXX | 1000–1999 | Reserved | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | CRESTVIEW | FL |
| 2008-06-11 | 850-306-2XXX | 2000–2999 | Assigned | COMCAST IP PHONE, LLC | 318J | CRESTVIEW | FL |
| 2011-01-17 | 850-306-3XXX | 3000–3999 | Assigned | COMCAST IP PHONE, LLC | 318J | CRESTVIEW | FL |
| 2016-02-18 | 850-306-4XXX | 4000–4999 | Assigned | ONVOY, LLC - FL | 937C | CRESTVIEW | FL |
| 2005-01-19 | 850-306-5XXX | 5000–5999 | Assigned | SOUTHERN COMMUNICATIONS SERVICES, INC. | 6744 | CRESTVIEW | FL |
| 2016-02-18 | 850-306-6XXX | 6000–6999 | Assigned | ONVOY, LLC - FL | 937C | CRESTVIEW | FL |
| 2014-06-26 | 850-306-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | CRESTVIEW | FL |
| 2010-04-13 | 850-306-8XXX | 8000–8999 | Assigned | MCC TELEPHONY LLC | 593K | CRESTVIEW | FL |
| — | 850-306-9XXX | 9000–9999 | Reserved | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | CRESTVIEW | FL |
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.