NumberResearchThousands-blocks in 601-448
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 601-448 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 601 blocks
Most active assignees, all time — NPA 601
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 |
|---|---|---|---|---|---|---|---|
| — | 601-448-0XXX | 0000–0999 | Reserved | LEVEL 3 COMMUNICATIONS, LLC - MS | 5178 | PORTGIBSON | MS |
| 2011-12-12 | 601-448-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - MS | 992E | PORTGIBSON | MS |
| 2015-05-20 | 601-448-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - MS | 992E | PORTGIBSON | MS |
| 2016-03-03 | 601-448-3XXX | 3000–3999 | Assigned | ONVOY, LLC - MS | 719E | PORTGIBSON | MS |
| 2021-11-21 | 601-448-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | PORTGIBSON | MS |
| 2010-12-15 | 601-448-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | PORTGIBSON | MS |
| 2016-03-03 | 601-448-6XXX | 6000–6999 | Assigned | ONVOY, LLC - MS | 719E | PORTGIBSON | MS |
| 2014-03-04 | 601-448-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | PORTGIBSON | MS |
| 2016-07-22 | 601-448-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - MS | 992E | PORTGIBSON | MS |
| 2017-01-17 | 601-448-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - MS | 992E | PORTGIBSON | 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.