NumberResearchThousands-blocks in 863-913
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 863-913 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 |
|---|---|---|---|---|---|---|---|
| 2019-05-28 | 863-913-0XXX | 0000–0999 | Assigned | ONVOY, LLC - FL | 937C | MULBERRY | FL |
| — | 863-913-1XXX | 1000–1999 | Reserved | PAETEC ITEL, LLC | 829J | MULBERRY | FL |
| — | 863-913-2XXX | 2000–2999 | Reserved | PAETEC ITEL, LLC | 829J | MULBERRY | FL |
| — | 863-913-3XXX | 3000–3999 | Reserved | PAETEC ITEL, LLC | 829J | MULBERRY | FL |
| 2019-03-11 | 863-913-4XXX | 4000–4999 | Assigned | METROPCS NETWORKS, LLC | 899D | MULBERRY | FL |
| 2004-09-13 | 863-913-5XXX | 5000–5999 | Assigned | MCI WORLDCOM COMMUNICATIONS, INC. - FL | 7448 | MULBERRY | FL |
| 2019-06-19 | 863-913-6XXX | 6000–6999 | Assigned | METROPCS NETWORKS, LLC | 899D | MULBERRY | FL |
| 2014-06-17 | 863-913-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | MULBERRY | FL |
| 2016-06-02 | 863-913-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | MULBERRY | FL |
| 2019-04-22 | 863-913-9XXX | 9000–9999 | Assigned | CORETEL FLORIDA, INC. - FL | 481F | MULBERRY | 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.