NumberResearchThousands-blocks in 856-735
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 856-735 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
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 856-735-0XXX | 0000–0999 | Reserved | PAETEC ITEL, LLC | 829J | RIVERTON | NJ |
| 2007-04-03 | 856-735-1XXX | 1000–1999 | Assigned | NETCARRIER TELECOM, INC. - NJ | 9003 | RIVERTON | NJ |
| — | 856-735-2XXX | 2000–2999 | Reserved | PAETEC ITEL, LLC | 829J | RIVERTON | NJ |
| 2019-05-16 | 856-735-3XXX | 3000–3999 | Assigned | CORETEL NEW JERSEY, INC. - NJ | 482F | RIVERTON | NJ |
| — | 856-735-4XXX | 4000–4999 | Available | RIVERTON | NJ | ||
| 2014-02-18 | 856-735-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | RIVERTON | NJ |
| 2008-09-03 | 856-735-6XXX | 6000–6999 | Assigned | BLOCK LINE SYSTEMS, LLC - NJ | 835E | RIVERTON | NJ |
| 2025-12-17 | 856-735-7XXX | 7000–7999 | Assigned | ONVOY, LLC - NJ | 637C | RIVERTON | NJ |
| 2026-04-14 | 856-735-8XXX | 8000–8999 | Assigned | ONVOY, LLC - NJ | 637C | RIVERTON | NJ |
| 2023-10-04 | 856-735-9XXX | 9000–9999 | Assigned | ONVOY, LLC - NJ | 637C | RIVERTON | NJ |
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.