NumberResearchThousands-blocks in 631-228
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 631-228 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 631 blocks
Most active assignees, all time — NPA 631
New assignments by month
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 631-228-0XXX | 0000–0999 | Reserved | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | SHOREHAM | NY |
| 2017-05-05 | 631-228-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | SHOREHAM | NY |
| 2016-08-31 | 631-228-2XXX | 2000–2999 | Assigned | PAETEC ITEL, LLC | 829J | SHOREHAM | NY |
| 2006-12-06 | 631-228-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | SHOREHAM | NY |
| 2007-09-17 | 631-228-4XXX | 4000–4999 | Assigned | CSC VOICE, LLC | 612K | SHOREHAM | NY |
| 2019-02-06 | 631-228-5XXX | 5000–5999 | Assigned | CABLEVISION LIGHTPATH, INC. - NY | 7126 | SHOREHAM | NY |
| 2024-08-27 | 631-228-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | SHOREHAM | NY |
| 2009-09-09 | 631-228-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - NY | 997E | SHOREHAM | NY |
| 2011-06-08 | 631-228-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - NY | 997E | SHOREHAM | NY |
| 2015-02-25 | 631-228-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | SHOREHAM | NY |
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.