NumberResearchThousands-blocks in 603-941
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 603-941 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 603 blocks
Most active assignees, all time — NPA 603
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2001-03-12 | 603-941-0XXX | 0000–0999 | Assigned | PAETEC ITEL, LLC | 829J | WOLFEBORO | NH |
| 2015-11-12 | 603-941-1XXX | 1000–1999 | Assigned | PAETEC ITEL, LLC | 829J | WOLFEBORO | NH |
| — | 603-941-2XXX | 2000–2999 | Available | WOLFEBORO | NH | ||
| 2005-06-03 | 603-941-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - NH | 4017 | WOLFEBORO | NH |
| 2003-03-03 | 603-941-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - NH | 4017 | WOLFEBORO | NH |
| 2013-02-21 | 603-941-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | WOLFEBORO | NH |
| 2025-07-01 | 603-941-6XXX | 6000–6999 | Assigned | COMCAST IP PHONE, LLC | 318J | WOLFEBORO | NH |
| — | 603-941-7XXX | 7000–7999 | Available | WOLFEBORO | NH | ||
| 2016-04-29 | 603-941-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | WOLFEBORO | NH |
| — | 603-941-9XXX | 9000–9999 | Reserved | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH | 7778 | WOLFEBORO | NH |
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.