NumberResearchThousands-blocks in 475-897
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 475-897 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 475 blocks
Most active assignees, all time — NPA 475
New assignments by month
Sep 2026
Aug 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2016-06-21 | 475-897-0XXX | 0000–0999 | Assigned | BARR TEL USA, INC. - CT | 866H | GREENWICH | CT |
| 2015-06-05 | 475-897-1XXX | 1000–1999 | Assigned | CSC VOICE, LLC | 612K | GREENWICH | CT |
| 2015-09-02 | 475-897-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CT | 4800 | GREENWICH | CT |
| 2017-06-14 | 475-897-3XXX | 3000–3999 | Assigned | PEERLESS NETWORK OF CONNECTICUT, LLC - CT | 539F | GREENWICH | CT |
| 2018-06-20 | 475-897-4XXX | 4000–4999 | Assigned | TC SYSTEMS, INC. - NY | 7140 | GREENWICH | CT |
| 2018-08-09 | 475-897-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CT | 639C | GREENWICH | CT |
| 2019-05-10 | 475-897-6XXX | 6000–6999 | Assigned | TELNYX LLC | 073H | GREENWICH | CT |
| 2016-02-10 | 475-897-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CT | 639C | GREENWICH | CT |
| 2016-07-18 | 475-897-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CT | 199F | GREENWICH | CT |
| 2016-02-10 | 475-897-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CT | 639C | GREENWICH | CT |
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.