NumberResearchThousands-blocks in 870-320
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 870-320 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 870 blocks
Most active assignees, all time — NPA 870
New assignments by month
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2020-01-31 | 870-320-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | SHERIDAN | AR |
| 2022-08-17 | 870-320-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | SHERIDAN | AR |
| 2023-12-11 | 870-320-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR | 6805 | SHERIDAN | AR |
| 2024-03-12 | 870-320-3XXX | 3000–3999 | Assigned | CSC VOICE, LLC | 612K | SHERIDAN | AR |
| — | 870-320-4XXX | 4000–4999 | Available | SHERIDAN | AR | ||
| — | 870-320-5XXX | 5000–5999 | Available | SHERIDAN | AR | ||
| 2017-03-06 | 870-320-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AR | 802C | SHERIDAN | AR |
| — | 870-320-7XXX | 7000–7999 | Available | SHERIDAN | AR | ||
| — | 870-320-8XXX | 8000–8999 | Available | SHERIDAN | AR | ||
| 2015-07-14 | 870-320-9XXX | 9000–9999 | Assigned | WINDSTREAM ARKANSAS, INC. | 1691 | SHERIDAN | AR |
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.