NumberResearchThousands-blocks in 571-417
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 571-417 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 571 blocks
Most active assignees, all time — NPA 571
New assignments by month
Sep 2026
Aug 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2018-04-11 | 571-417-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA | 6827 | LEESBURG | VA |
| 2018-11-07 | 571-417-1XXX | 1000–1999 | Assigned | VONAGE AMERICA LLC | 197D | LEESBURG | VA |
| 2018-05-17 | 571-417-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LEESBURG | VA |
| 2018-02-07 | 571-417-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LEESBURG | VA |
| 2024-01-10 | 571-417-4XXX | 4000–4999 | Assigned | TERRA NOVA TELECOM INC. | 145J | LEESBURG | VA |
| 2024-01-22 | 571-417-5XXX | 5000–5999 | Assigned | ONVOY, LLC - VA | 138E | LEESBURG | VA |
| 2024-03-15 | 571-417-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - VA | 4644 | LEESBURG | VA |
| 2018-11-07 | 571-417-7XXX | 7000–7999 | Assigned | VONAGE AMERICA LLC | 197D | LEESBURG | VA |
| 2018-11-01 | 571-417-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA | 6827 | LEESBURG | VA |
| 2018-03-21 | 571-417-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | LEESBURG | VA |
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.