NumberResearchThousands-blocks in 301-339
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 301-339 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
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 301-339-0XXX | 0000–0999 | Reserved | PAETEC ITEL, LLC | 829J | WSNGTNZN10 | MD |
| — | 301-339-1XXX | 1000–1999 | Reserved | PAETEC ITEL, LLC | 829J | WSNGTNZN10 | MD |
| — | 301-339-2XXX | 2000–2999 | Reserved | PAETEC ITEL, LLC | 829J | WSNGTNZN10 | MD |
| 2006-11-17 | 301-339-3XXX | 3000–3999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | WSNGTNZN10 | MD |
| 2006-10-17 | 301-339-4XXX | 4000–4999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | WSNGTNZN10 | MD |
| — | 301-339-5XXX | 5000–5999 | Reserved | PAETEC ITEL, LLC | 829J | WSNGTNZN10 | MD |
| 2012-02-06 | 301-339-6XXX | 6000–6999 | Assigned | LEVEL 3 TELECOM OF MARYLAND, LLC - MD | 7591 | WSNGTNZN10 | MD |
| 2006-11-22 | 301-339-7XXX | 7000–7999 | Assigned | PAETEC ITEL, LLC | 829J | WSNGTNZN10 | MD |
| 2012-11-01 | 301-339-8XXX | 8000–8999 | Assigned | COMCAST IP PHONE, LLC | 318J | WSNGTNZN10 | MD |
| — | 301-339-9XXX | 9000–9999 | Reserved | PAETEC ITEL, LLC | 829J | WSNGTNZN10 | MD |
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.