NumberResearchThousands-blocks in 863-588
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 863-588 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 863 blocks
Most active assignees, all time — NPA 863
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2005-01-13 | 863-588-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | HAINESCITY | FL |
| 2005-09-01 | 863-588-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | HAINESCITY | FL |
| 2005-09-01 | 863-588-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | HAINESCITY | FL |
| 2006-04-11 | 863-588-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | HAINESCITY | FL |
| — | 863-588-4XXX | 4000–4999 | Reserved | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | HAINESCITY | FL |
| 2011-03-01 | 863-588-5XXX | 5000–5999 | Assigned | METROPCS NETWORKS, LLC | 899D | HAINESCITY | FL |
| 2012-03-22 | 863-588-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - FL | 982E | HAINESCITY | FL |
| 2012-05-25 | 863-588-7XXX | 7000–7999 | Assigned | ONVOY, LLC - FL | 937C | HAINESCITY | FL |
| 2012-10-15 | 863-588-8XXX | 8000–8999 | Assigned | METROPCS NETWORKS, LLC | 899D | HAINESCITY | FL |
| 2011-08-17 | 863-588-9XXX | 9000–9999 | Assigned | METROPCS NETWORKS, LLC | 899D | HAINESCITY | 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.