NumberResearchThousands-blocks in 603-968
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 603-968 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 |
|---|---|---|---|---|---|---|---|
| 2002-08-28 | 603-968-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - NH | 996E | ASHLAND | NH |
| 2022-11-16 | 603-968-1XXX | 1000–1999 | Assigned | TERRA NOVA TELECOM INC. | 145J | ASHLAND | NH |
| — | 603-968-2XXX | 2000–2999 | Reserved | CONSOLIDATED COMM OF NO. NEW ENGLAND-NH | 5113 | ASHLAND | NH |
| — | 603-968-3XXX | 3000–3999 | Reserved | CONSOLIDATED COMM OF NO. NEW ENGLAND-NH | 5113 | ASHLAND | NH |
| 2024-05-29 | 603-968-4XXX | 4000–4999 | Assigned | TERRA NOVA TELECOM INC. | 145J | ASHLAND | NH |
| 2004-08-06 | 603-968-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - NH | 4017 | ASHLAND | NH |
| 2008-03-20 | 603-968-6XXX | 6000–6999 | Assigned | IDT AMERICA, CORP. - NH | 314C | ASHLAND | NH |
| — | 603-968-7XXX | 7000–7999 | Reserved | CONSOLIDATED COMM OF NO. NEW ENGLAND-NH | 5113 | ASHLAND | NH |
| — | 603-968-8XXX | 8000–8999 | Available | ASHLAND | NH | ||
| — | 603-968-9XXX | 9000–9999 | Reserved | CONSOLIDATED COMM OF NO. NEW ENGLAND-NH | 5113 | ASHLAND | 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.