NumberResearchThousands-blocks in 201-877
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 201-877 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
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2011-05-17 | 201-877-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - NJ | 118F | CLIFFSIDE | NJ |
| 2011-05-17 | 201-877-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - NJ | 118F | CLIFFSIDE | NJ |
| 2011-03-31 | 201-877-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | CLIFFSIDE | NJ |
| 2011-03-31 | 201-877-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | CLIFFSIDE | NJ |
| 2011-10-06 | 201-877-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - NJ | 4804 | CLIFFSIDE | NJ |
| 2014-04-04 | 201-877-5XXX | 5000–5999 | Assigned | ONVOY, LLC - NJ | 637C | CLIFFSIDE | NJ |
| 2014-01-08 | 201-877-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | CLIFFSIDE | NJ |
| 2015-10-23 | 201-877-7XXX | 7000–7999 | Assigned | PAETEC ITEL, LLC | 829J | CLIFFSIDE | NJ |
| 2013-06-26 | 201-877-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | CLIFFSIDE | NJ |
| 2013-07-29 | 201-877-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | CLIFFSIDE | 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.