NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 603-356 1XXX which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 NO CONWAY NH
— 603-358 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 KEENE NH
— 603-362 0XXX1XXX2XXX3XXX7XXX · 3 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 HAMPSTEAD NH
— 603-363 1XXX3XXX5XXX · 3 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 SPOFFORD NH
— 603-366 0XXX1XXX3XXX6XXX8XXX · 2 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 LACONIA NH
— 603-367 0XXX1XXX2XXX3XXX7XXX · 5 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 MADISON NH
— 603-374 1XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 BARTLETT NH
— 603-378 1XXX3XXX5XXX8XXX · 4 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 PLAISTOW NH
— 603-382 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 PLAISTOW NH
— 603-383 1XXX2XXX3XXX5XXX7XXX · 5 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 JACKSON NH
— 603-385 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 MANCHESTER NH
— 603-394 1XXX2XXX3XXX4XXX5XXX6XXX · 4 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 SO HAMPTON NH
— 603-399 1XXX2XXX3XXX5XXX6XXX · 4 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 WESTMORELD NH
— 603-421 6XXX7XXX8XXX · 2 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 DERRY NH
— 603-422 2XXX3XXX4XXX5XXX which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 PORTSMOUTH NH
— 603-423 7XXX which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 MERRIMACK NH
— 603-424 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 MERRIMACK NH
— 603-425 8XXX9XXX which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 DERRY NH
— 603-426 1XXX2XXX3XXX4XXX6XXX · 2 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 DERRY NH
— 603-427 8XXX9XXX · 2 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 PORTSMOUTH NH
— 603-429 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 MERRIMACK NH
— 603-430 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 PORTSMOUTH NH
— 603-431 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 PORTSMOUTH NH
— 603-432 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 DERRY NH
— 603-433 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 PORTSMOUTH NH
— 603-434 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 DERRY NH
— 603-435 0XXX1XXX2XXX3XXX4XXX · 5 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 PITTSFIELD NH
— 603-436 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 PORTSMOUTH NH
— 603-437 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 DERRY NH
— 603-440 0XXX1XXX3XXX4XXX5XXX8XXX9XXX which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 MERRIMACK NH
— 603-442 4XXX5XXX6XXX · 2 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 LEBANON NH
— 603-443 none assigned yet which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 LEBANON NH
— 603-444 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 LITTLETON NH
— 603-445 0XXX4XXX6XXX7XXX · 4 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 NO WALPOLE NH
— 603-446 1XXX6XXX8XXX · 3 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 MARLOW NH
— 603-447 0XXX7XXX9XXX · 3 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 CONWAY NH
— 603-448 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 LEBANON NH
— 603-449 4XXX6XXX9XXX · 3 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 MILAN NH
— 603-463 0XXX1XXX4XXX6XXX · 3 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 DEERFIELD NH
— 603-466 1XXX4XXX7XXX8XXX · 4 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 GORHAM NH
— 603-471 3XXX5XXX · 2 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 BEDFORD NH
— 603-472 0XXX1XXX · 2 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 BEDFORD NH
— 603-473 1XXX3XXX4XXX5XXX6XXX7XXX9XXX · 7 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 MILTON ML NH
— 603-474 4XXX which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 SEABROOK NH
— 603-476 3XXX4XXX7XXX · 3 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 CTRSANDWIH NH
— 603-482 6XXX7XXX9XXX · 3 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 ERROL NH
— 603-483 3XXX4XXX6XXX7XXX9XXX · 5 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 CANDIA NH
— 603-485 0XXX which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 SUNCOOK NH
— 603-487 0XXX1XXX4XXX6XXX7XXX9XXX · 4 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 NEW BOSTON NH
— 603-492 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 MANCHESTER NH

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.