NumberResearchThousands-blocks in 407-548
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/19/2026
The ten 1,000-number thousand-blocks inside prefix 407-548 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 407 blocks
Most active assignees, all time — NPA 407
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 407-548-0XXX | 0000–0999 | Reserved | MCI WORLDCOM COMMUNICATIONS, INC. - FL | 7448 | SANFORD | FL |
| 2017-03-08 | 407-548-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | SANFORD | FL |
| — | 407-548-2XXX | 2000–2999 | Reserved | MCI WORLDCOM COMMUNICATIONS, INC. - FL | 7448 | SANFORD | FL |
| 2006-06-20 | 407-548-3XXX | 3000–3999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | SANFORD | FL |
| 2014-12-09 | 407-548-4XXX | 4000–4999 | Assigned | METROPCS NETWORKS, LLC | 899D | SANFORD | FL |
| — | 407-548-5XXX | 5000–5999 | Reserved | MCI WORLDCOM COMMUNICATIONS, INC. - FL | 7448 | SANFORD | FL |
| 2017-04-20 | 407-548-6XXX | 6000–6999 | Assigned | BHN IP ENABLED SERVICES, LLC | 045L | SANFORD | FL |
| 2014-12-09 | 407-548-7XXX | 7000–7999 | Assigned | METROPCS NETWORKS, LLC | 899D | SANFORD | FL |
| 2016-01-14 | 407-548-8XXX | 8000–8999 | Assigned | MCI WORLDCOM COMMUNICATIONS, INC. - FL | 7448 | SANFORD | FL |
| 2016-01-14 | 407-548-9XXX | 9000–9999 | Assigned | MCI WORLDCOM COMMUNICATIONS, INC. - FL | 7448 | SANFORD | FL |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.