NumberResearchThousands-blocks in 201-256
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 201-256 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 201 blocks
Most active assignees, all time — NPA 201
New assignments by month
Sep 2026
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Jun 2026
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Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2011-07-26 | 201-256-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - NJ | 118F | CLOSTER | NJ |
| 2011-03-22 | 201-256-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - NJ | 118F | CLOSTER | NJ |
| — | 201-256-2XXX | 2000–2999 | Reserved | AT&T - LOCAL | 7421 | CLOSTER | NJ |
| 2005-10-19 | 201-256-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CLOSTER | NJ |
| 2005-10-19 | 201-256-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CLOSTER | NJ |
| 2008-01-04 | 201-256-5XXX | 5000–5999 | Assigned | OMNIPOINT COMMUNICATIONS, INC. - NJ | 6623 | CLOSTER | NJ |
| 2008-04-03 | 201-256-6XXX | 6000–6999 | Assigned | YMAX COMMUNICATIONS CORP. - NJ | 325E | CLOSTER | NJ |
| 2008-09-10 | 201-256-7XXX | 7000–7999 | Assigned | OMNIPOINT COMMUNICATIONS, INC. - NJ | 6623 | CLOSTER | NJ |
| 2002-03-08 | 201-256-8XXX | 8000–8999 | Assigned | COOPERATIVE COMMUNICATIONS, INC. | 8407 | CLOSTER | NJ |
| 2010-03-05 | 201-256-9XXX | 9000–9999 | Assigned | ONVOY, LLC - NJ | 637C | CLOSTER | 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.