NumberResearchThousands-blocks in 856-671
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 856-671 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 856 blocks
Most active assignees, all time — NPA 856
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2005-03-31 | 856-671-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - NJ | 4804 | COLLINGSWD | NJ |
| 2010-01-27 | 856-671-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - NJ | 118F | COLLINGSWD | NJ |
| 2015-05-04 | 856-671-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - NJ | 118F | COLLINGSWD | NJ |
| 2015-10-14 | 856-671-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | COLLINGSWD | NJ |
| 2016-01-19 | 856-671-4XXX | 4000–4999 | Assigned | ONVOY, LLC - NJ | 637C | COLLINGSWD | NJ |
| 2017-04-12 | 856-671-5XXX | 5000–5999 | Assigned | TELNYX LLC | 073H | COLLINGSWD | NJ |
| — | 856-671-6XXX | 6000–6999 | Reserved | PAETEC ITEL, LLC | 829J | COLLINGSWD | NJ |
| 2014-02-13 | 856-671-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | COLLINGSWD | NJ |
| 2026-02-26 | 856-671-8XXX | 8000–8999 | Assigned | ONVOY, LLC - NJ | 637C | COLLINGSWD | NJ |
| 2026-02-26 | 856-671-9XXX | 9000–9999 | Assigned | ONVOY, LLC - NJ | 637C | COLLINGSWD | NJ |
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.