NumberResearchThousands-blocks in 870-252
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 870-252 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
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2003-12-23 | 870-252-0XXX | 0000–0999 | Assigned | E. RITTER COMMUNICATIONS, LLC | 128L | GRUBBS | AR |
| — | 870-252-1XXX | 1000–1999 | Reserved | SOUTHWESTERN BELL | 9533 | GRUBBS | AR |
| 2020-09-16 | 870-252-2XXX | 2000–2999 | Assigned | ONVOY, LLC - AR | 348F | GRUBBS | AR |
| — | 870-252-3XXX | 3000–3999 | Reserved | SOUTHWESTERN BELL | 9533 | GRUBBS | AR |
| 2018-11-02 | 870-252-4XXX | 4000–4999 | Assigned | TELNYX LLC | 073H | GRUBBS | AR |
| 2011-03-21 | 870-252-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | GRUBBS | AR |
| 2018-03-20 | 870-252-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AR | 802C | GRUBBS | AR |
| 2014-12-12 | 870-252-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | GRUBBS | AR |
| 2020-02-12 | 870-252-8XXX | 8000–8999 | Assigned | ONVOY, LLC - AR | 348F | GRUBBS | AR |
| — | 870-252-9XXX | 9000–9999 | Reserved | SOUTHWESTERN BELL | 9533 | GRUBBS | 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.