NumberResearch Membership · Data 09/29/2026

Recent prefix assignments

347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026

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, last 30 days
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
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
— 603-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NH
— 603-412 2XXX4XXX6XXX · 3 holders which blocks → UNITED STATES CELLULAR - NH 6290 PLYMOUTH NH
— 603-413 1XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J MANCHESTER NH
— 603-414 0XXX2XXX3XXX5XXX6XXX8XXX · 5 holders which blocks → TDS METROCOM, LLC 520K SUNAPEE NH
— 603-415 not yet reported which blocks → FREEDOM RING COMMUNICATIONS, LLC 8468 CONCORD NH
— 603-418 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J EXETER NH
— 603-419 1XXX2XXX3XXX5XXX which blocks → UNITED STATES CELLULAR - NH 6290 SUNCOOK NH
— 603-420 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 7778 MERRIMACK 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
— 603-428 4XXX9XXX · 2 holders which blocks → MERRIMACK CO. TELEPHONE CO., DBA CONTOOCOOK VALLEY 3320 HENNIKER 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
— 603-438 none assigned yet which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 NASHUA NH
— 603-439 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J KEENE 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
— 603-452 2XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → FREEDOM RING COMMUNICATIONS, LLC 8468 CONWAY NH
— 603-453 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → AT&T - LOCAL 7421 HAMPSTEAD NH
— 603-454 9XXX which blocks → UNITED STATES CELLULAR - NH 6290 SUNAPEE NH
— 603-455 none assigned yet which blocks → UNITED STATES CELLULAR - NH 6290 LACONIA NH
— 603-456 1XXX4XXX5XXX8XXX9XXX which blocks → MERRIMACK COUNTY TEL. CO. 0047 WARNER NH
— 603-458 0XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J SALEM NH
— 603-459 3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J NASHUA NH
— 603-460 2XXX4XXX5XXX7XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 7778 DEERFIELD NH
— 603-461 0XXX1XXX3XXX4XXX5XXX8XXX9XXX · 3 holders which blocks → UNITED STATES CELLULAR - NH 6290 MERRIMACK NH
— 603-462 3XXX which blocks → FREEDOM RING COMMUNICATIONS, LLC 8468 DEERFIELD NH
— 603-463 0XXX1XXX4XXX6XXX · 3 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 DEERFIELD NH
— 603-464 9XXX which blocks → MERRIMACK CO. TELEPHONE CO., DBA CONTOOCOOK VALLEY 3320 HILLSBORO NH
— 603-465 1XXX4XXX5XXX8XXX · 2 holders which blocks → HOLLIS TELEPHONE COMPANY, INC. 3321 HOLLIS NH
— 603-466 1XXX4XXX7XXX8XXX · 4 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 GORHAM NH

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.