NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026
Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.
Most active assignees, all time — NPA 228
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2026-04-07 | 228-274-3XXX | 3000–3999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MS - LLC | 458C | GULFPORT | MS |
| 2021-10-11 | 228-274-0XXX | 0000–0999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MS - LLC | 458C | GULFPORT | MS |
| 2020-11-23 | 228-549-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MS - LLC | 458C | PASCAGOULA | MS |
| 2019-10-11 | 228-351-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MS - LLC | 458C | GULFPORT | MS |
| 2019-10-11 | 228-351-7XXX | 7000–7999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MS - LLC | 458C | GULFPORT | MS |
| 2019-10-11 | 228-351-8XXX | 8000–8999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MS - LLC | 458C | GULFPORT | MS |
| 2017-09-07 | 228-283-4XXX | 4000–4999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MS - LLC | 458C | VANCLEAVE | MS |
| 2017-07-18 | 228-200-4XXX | 4000–4999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MS - LLC | 458C | HURLEY | MS |
| 2016-10-05 | 228-271-4XXX | 4000–4999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MS - LLC | 458C | BILOXI | MS |
| 2016-04-27 | 228-364-4XXX | 4000–4999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MS - LLC | 458C | PASSCHRSTN | MS |
| 2015-07-22 | 228-334-3XXX | 3000–3999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MS - LLC | 458C | OCEAN SPG | MS |
| 2014-01-21 | 228-460-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MS - LLC | 458C | MOSS POINT | MS |
| 2013-04-18 | 228-220-5XXX | 5000–5999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MS - LLC | 458C | BAYSTLOUIS | MS |
| 2012-07-24 | 228-213-5XXX | 5000–5999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MS - LLC | 458C | GULFPORT | MS |
| 2009-03-25 | 228-205-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MS - LLC | 458C | PASCAGOULA | MS |
| 2009-03-25 | 228-284-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MS - LLC | 458C | GULFPORT | MS |
| 2008-05-01 | 228-271-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MS - LLC | 458C | BILOXI | 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.