NumberResearchThousands-blocks in 870-477
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 870-477 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 | 870-477-0XXX | 0000–0999 | Assigned | E. RITTER COMMUNICATIONS, LLC | 128L | CASH | AR |
| — | 870-477-1XXX | 1000–1999 | Reserved | SOUTHWESTERN BELL | 9533 | CASH | AR |
| 2018-11-02 | 870-477-2XXX | 2000–2999 | Assigned | TELNYX LLC | 073H | CASH | AR |
| 2011-03-30 | 870-477-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CASH | AR |
| 2020-02-11 | 870-477-4XXX | 4000–4999 | Assigned | ONVOY, LLC - AR | 348F | CASH | AR |
| 2020-10-13 | 870-477-5XXX | 5000–5999 | Assigned | TERRA NOVA TELECOM INC. | 145J | CASH | AR |
| 2018-04-19 | 870-477-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | CASH | AR |
| 2014-12-11 | 870-477-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | CASH | AR |
| 2020-09-17 | 870-477-8XXX | 8000–8999 | Assigned | ONVOY, LLC - AR | 348F | CASH | AR |
| 2020-09-17 | 870-477-9XXX | 9000–9999 | Assigned | ONVOY, LLC - AR | 348F | CASH | 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.