NumberResearchThousands-blocks in 509-380
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 509-380 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 509 blocks
Most active assignees, all time — NPA 509
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2007-03-05 | 509-380-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | PASCO | WA |
| 2007-05-15 | 509-380-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA | 5812 | PASCO | WA |
| 2010-03-09 | 509-380-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA | 5812 | PASCO | WA |
| 2007-10-16 | 509-380-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA | 5812 | PASCO | WA |
| 2008-01-28 | 509-380-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA | 5812 | PASCO | WA |
| 2008-03-19 | 509-380-5XXX | 5000–5999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | PASCO | WA |
| 2008-09-18 | 509-380-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA | 5812 | PASCO | WA |
| 2009-09-14 | 509-380-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA | 5812 | PASCO | WA |
| 2010-01-13 | 509-380-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA | 5812 | PASCO | WA |
| 2009-12-08 | 509-380-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - WA | 006F | PASCO | WA |
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.