NumberResearchThousands-blocks in 228-283
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 228-283 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 228 blocks
Most active assignees, all time — NPA 228
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2004-10-20 | 228-283-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MS | 5178 | VANCLEAVE | MS |
| 2023-03-27 | 228-283-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | VANCLEAVE | MS |
| 2020-02-06 | 228-283-2XXX | 2000–2999 | Assigned | AIRUS, INC. - MS | 459H | VANCLEAVE | MS |
| 2019-04-15 | 228-283-3XXX | 3000–3999 | Assigned | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | VANCLEAVE | MS |
| 2017-09-07 | 228-283-4XXX | 4000–4999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MS - LLC | 458C | VANCLEAVE | MS |
| 2010-07-29 | 228-283-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | VANCLEAVE | MS |
| 2020-11-19 | 228-283-6XXX | 6000–6999 | Assigned | ONVOY, LLC - MS | 719E | VANCLEAVE | MS |
| 2014-04-11 | 228-283-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | VANCLEAVE | MS |
| 2018-10-25 | 228-283-8XXX | 8000–8999 | Assigned | AIRUS, INC. - MS | 459H | VANCLEAVE | MS |
| 2018-10-31 | 228-283-9XXX | 9000–9999 | Assigned | ONVOY, LLC - MS | 719E | VANCLEAVE | MS |
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.