NumberResearchThousands-blocks in 603-730
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 603-730 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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Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2001-05-25 | 603-730-0XXX | 0000–0999 | Assigned | PAETEC ITEL, LLC | 829J | NO CONWAY | NH |
| 2002-11-14 | 603-730-1XXX | 1000–1999 | Assigned | FREEDOM RING COMMUNICATIONS, LLC | 8468 | NO CONWAY | NH |
| 2010-07-02 | 603-730-2XXX | 2000–2999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | NO CONWAY | NH |
| 2022-11-23 | 603-730-3XXX | 3000–3999 | Assigned | ONVOY, LLC - NH | 637E | NO CONWAY | NH |
| 2012-08-03 | 603-730-4XXX | 4000–4999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | NO CONWAY | NH |
| 2012-07-30 | 603-730-5XXX | 5000–5999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | NO CONWAY | NH |
| 2023-07-21 | 603-730-6XXX | 6000–6999 | Assigned | ONVOY, LLC - NH | 637E | NO CONWAY | NH |
| 2008-12-05 | 603-730-7XXX | 7000–7999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | NO CONWAY | NH |
| 2022-10-07 | 603-730-8XXX | 8000–8999 | Assigned | COMMIO, LLC | 939H | NO CONWAY | NH |
| — | 603-730-9XXX | 9000–9999 | Reserved | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH | 7778 | NO CONWAY | 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.