NumberResearchThousands-blocks in 301-750
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/19/2026
The ten 1,000-number thousand-blocks inside prefix 301-750 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 301 blocks
Most active assignees, all time — NPA 301
New assignments by month
Sep 2026
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Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2004-03-19 | 301-750-0XXX | 0000–0999 | Assigned | CORE COMMUNICATIONS, INC.- MD | 2593 | FRIENDSVL | MD |
| 2016-08-30 | 301-750-1XXX | 1000–1999 | Assigned | ONVOY, LLC - MD | 876D | FRIENDSVL | MD |
| 2012-01-06 | 301-750-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | FRIENDSVL | MD |
| 2014-09-04 | 301-750-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | FRIENDSVL | MD |
| 2013-04-25 | 301-750-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | FRIENDSVL | MD |
| 2007-08-21 | 301-750-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | FRIENDSVL | MD |
| 2015-01-14 | 301-750-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | FRIENDSVL | MD |
| 2015-07-13 | 301-750-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | FRIENDSVL | MD |
| 2015-10-12 | 301-750-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | FRIENDSVL | MD |
| 2016-08-30 | 301-750-9XXX | 9000–9999 | Assigned | ONVOY, LLC - MD | 876D | FRIENDSVL | MD |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.