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
— 413-374 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 SPRINGFLD MA
— 413-375 not yet reported which blocks → PAETEC ITEL, LLC 829J HAMPDEN MA
— 413-376 3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J GREENFIELD MA
— 413-377 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MA 7103 CHICOPEE MA
— 413-378 0XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → VERIZON NEW ENGLAND INC. 9102 CHICOPEE MA
— 413-382 not yet reported which blocks → PAETEC ITEL, LLC 829J SPRINGFLD MA
— 413-383 not yet reported which blocks → PAETEC ITEL, LLC 829J LEE MA
— 413-385 3XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J LUDLOW MA
— 413-386 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 SPRINGFLD MA
— 413-387 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J NORTHAMPTN MA
— 413-394 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → VERIZON NEW ENGLAND INC. 9102 LEE MA
— 413-395 2XXX3XXX9XXX · 2 holders which blocks → VERIZON NEW ENGLAND INC. 9102 PITTSFIELD MA
— 413-396 not yet reported which blocks → MA
— 413-397 1XXX2XXX3XXX · 3 holders which blocks → VERIZON NEW ENGLAND INC. 9102 SO DEERFLD MA
— 413-398 1XXX3XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J NORTHADAMS MA
— 413-401 not yet reported which blocks → MA
— 413-403 not yet reported which blocks → PAETEC ITEL, LLC 829J DALTON MA
— 413-407 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → TERRA NOVA TELECOM INC. 145J CHESTER MA
— 413-410 not yet reported which blocks → PAETEC ITEL, LLC 829J LENOX MA
— 413-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX MA
— 413-413 not yet reported which blocks → MA
— 413-418 1XXX3XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J PITTSFIELD MA
— 413-420 3XXX4XXX5XXX7XXX8XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J HOLYOKE MA
— 413-424 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 4 holders which blocks → VERIZON NEW ENGLAND INC. 9102 MONROE BDG MA
— 413-425 3XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J HOLYOKE MA
— 413-426 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → VERIZON NEW ENGLAND INC. 9102 SPRINGFLD MA
— 413-427 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 HOLYOKE MA
— 413-429 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TC SYSTEMS, INC. 7135 GREATBNGTN MA
— 413-430 0–9 XXXall 10 · 5 holders which blocks → NUSO, LLC 732J HOLYOKE MA
— 413-431 not yet reported which blocks → PAETEC ITEL, LLC 829J LUDLOW MA
— 413-433 not yet reported which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 SPRINGFLD MA
— 413-436 2XXX6XXX8XXX · 3 holders which blocks → VERIZON NEW ENGLAND INC. 9102 WARREN MA
— 413-437 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → PAETEC ITEL, LLC 829J HOLYOKE MA
— 413-439 3XXX5XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J SPRINGFLD MA
— 413-441 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 PITTSFIELD MA
— 413-442 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 PITTSFIELD MA
— 413-443 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 PITTSFIELD MA
— 413-444 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → ONVOY, LLC - MA 892D BERNARDSTN MA
— 413-445 1XXX which blocks → VERIZON NEW ENGLAND INC. 9102 PITTSFIELD MA
— 413-446 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PITTSFIELD MA
— 413-447 none assigned yet which blocks → VERIZON NEW ENGLAND INC. 9102 PITTSFIELD MA
— 413-448 none assigned yet which blocks → VERIZON NEW ENGLAND INC. 9102 PITTSFIELD MA
— 413-449 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TC SYSTEMS, INC. 7135 PITTSFIELD MA
— 413-451 not yet reported which blocks → PAETEC ITEL, LLC 829J LONGMEADOW MA
— 413-452 8XXX which blocks → VERIZON NEW ENGLAND INC. 9102 SPRINGFLD MA
— 413-453 1XXX6XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E SO DEERFLD MA
— 413-454 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J WESTFIELD MA
— 413-458 6XXX which blocks → VERIZON NEW ENGLAND INC. 9102 WILLIAMSTN MA
— 413-459 1XXX3XXX5XXX6XXX7XXX8XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 CHICOPEE MA
— 413-460 not yet reported which blocks → PAETEC ITEL, LLC 829J BELCHERTN MA

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.