NumberResearchThousands-blocks in 870-507
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 870-507 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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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 870-507-0XXX | 0000–0999 | Reserved | TCA COMMUNICATIONS, LLC DBA SUDDENLINK COMM - AR | 048G | MIDWAY | AR |
| — | 870-507-1XXX | 1000–1999 | Assigned (pending) | MIDWAY | AR | ||
| — | 870-507-2XXX | 2000–2999 | Assigned (pending) | MIDWAY | AR | ||
| — | 870-507-3XXX | 3000–3999 | Assigned (pending) | MIDWAY | AR | ||
| — | 870-507-4XXX | 4000–4999 | Assigned (pending) | MIDWAY | AR | ||
| 2021-06-08 | 870-507-5XXX | 5000–5999 | Assigned | ONVOY, LLC - AR | 348F | MIDWAY | AR |
| 2018-04-19 | 870-507-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AR | 802C | MIDWAY | AR |
| — | 870-507-7XXX | 7000–7999 | Assigned (pending) | MIDWAY | AR | ||
| — | 870-507-8XXX | 8000–8999 | Assigned (pending) | MIDWAY | AR | ||
| — | 870-507-9XXX | 9000–9999 | Assigned (pending) | MIDWAY | AR |
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.