NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, all time — NPA 603
CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 247
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
Clear Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2014-09-30 603-308 0–9 XXXwhole prefix which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 HANOVER NH
2001-09-19 603-302 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 MANCHESTER NH
— 603-201 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 XXXXXXXXXX NH
— 603-212 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 SALEM NH
— 603-221 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 NASHUA NH
— 603-222 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 MANCHESTER NH
— 603-223 7XXX which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 CONCORD NH
— 603-224 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 CONCORD NH
— 603-225 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 CONCORD NH
— 603-226 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 CONCORD NH
— 603-227 6XXX which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 CONCORD NH
— 603-228 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 CONCORD NH
— 603-229 2XXX8XXX9XXX · 2 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 CONCORD NH
— 603-230 0XXX2XXX8XXX · 3 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 CONCORD NH
— 603-236 0XXX1XXX2XXX3XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 CAMPTON NH
— 603-237 1XXX2XXX7XXX · 3 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 COLEBROOK NH
— 603-239 0XXX1XXX2XXX3XXX · 3 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 WINCHESTER NH
— 603-240 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 MANCHESTER NH
— 603-242 0XXX1XXX2XXX4XXX5XXX8XXX9XXX · 5 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 TROY NH
— 603-245 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 PORTSMOUTH NH
— 603-246 2XXX4XXX5XXX6XXX9XXX · 4 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 WSTEWATSTN NH
— 603-248 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 DOVER NH
— 603-249 0XXX2XXX5XXX6XXX7XXX · 3 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 MILFORD NH
— 603-253 0XXX1XXX2XXX5XXX · 3 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 CENTER HBR NH
— 603-256 1XXX2XXX5XXX7XXX9XXX · 3 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 WCHESTEFLD NH
— 603-262 0XXX1XXX2XXX3XXX4XXX5XXX · 5 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 MERRIMACK NH
— 603-266 5XXX7XXX8XXX9XXX · 2 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 TILTON NH
— 603-267 0XXX2XXX3XXX4XXX5XXX · 5 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 BELMONT NH
— 603-268 1XXX2XXX3XXX4XXX5XXX6XXX9XXX which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 SUNCOOK NH
— 603-271 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 CONCORD NH
— 603-272 1XXX2XXX5XXX6XXX7XXX · 4 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 PIERMONT NH
— 603-279 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 MEREDITH NH
— 603-281 6XXX7XXX8XXX9XXX which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 NASHUA NH
— 603-284 2XXX4XXX · 2 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 CTRSANDWIH NH
— 603-286 0XXX which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 TILTON NH
— 603-293 3XXX5XXX6XXX which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 LACONIA NH
— 603-298 none assigned yet which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 W LEBANON NH
— 603-323 0XXX4XXX5XXX6XXX · 3 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 TAMWORTH NH
— 603-329 1XXX2XXX3XXX · 3 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 HAMPSTEAD NH
— 603-330 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 ROCHESTER NH
— 603-332 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 ROCHESTER NH
— 603-334 1XXX which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 PORTSMOUTH NH
— 603-335 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 ROCHESTER NH
— 603-336 1XXX2XXX3XXX6XXX8XXX · 5 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 HINSDALE NH
— 603-337 5XXX8XXX · 2 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 ROCHESTER NH
— 603-342 0XXX5XXX6XXX9XXX · 4 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 BERLIN NH
— 603-352 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 KEENE NH
— 603-353 0XXX3XXX5XXX · 3 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 ORFORD NH
— 603-354 0XXX1XXX3XXX8XXX9XXX · 5 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 KEENE NH
— 603-355 none assigned yet which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 KEENE NH

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.