NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
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
— 617-733 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
— 617-734 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 BROOKLINE MA
— 617-735 0XXX5XXX6XXX7XXX · 2 holders which blocks → VERIZON NEW ENGLAND INC. 9102 BROOKLINE MA
— 617-736 not yet reported which blocks → MA
— 617-737 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 BOSTON MA
— 617-738 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 BROOKLINE MA
— 617-739 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 BROOKLINE MA
— 617-740 9XXX which blocks → VERIZON NEW ENGLAND INC. 9102 DORCHESTER MA
— 617-741 0XXX1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 SOMERVILLE MA
— 617-742 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 BOSTON MA
— 617-743 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 BOSTON MA
— 617-744 2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J WATERTOWN MA
— 617-745 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 QUINCY MA
— 617-746 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 BRIGHTON MA
— 617-747 not yet reported which blocks → TC SYSTEMS, INC. 7135 BOSTON MA
— 617-748 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 BOSTON MA
— 617-749 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - MA 892D ROXBURY MA
— 617-750 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 QUINCY MA
— 617-751 0XXX1XXX2XXX3XXX5XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BROOKLINE MA
— 617-752 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SO BOSTON MA
— 617-753 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 BOSTON MA
— 617-754 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 BROOKLINE MA
— 617-755 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
— 617-757 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 BOSTON MA
— 617-758 1XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J CAMBRIDGE MA
— 617-759 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DEDHAM MA
— 617-760 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 BOSTON MA
— 617-761 7XXX which blocks → VERIZON NEW ENGLAND INC. 9102 CAMBRIDGE MA
— 617-762 1XXX2XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 NEWTON MA
— 617-763 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
— 617-764 3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J SOMERVILLE MA
— 617-766 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → TC SYSTEMS, INC. 7135 SO BOSTON MA
— 617-768 7XXX which blocks → VERIZON NEW ENGLAND INC. 9102 CAMBRIDGE MA
— 617-769 2XXX8XXX9XXX · 3 holders which blocks → VERIZON NEW ENGLAND INC. 9102 QUINCY MA
— 617-770 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 QUINCY MA
— 617-771 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MALDEN MA
— 617-772 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 BOSTON MA
— 617-773 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 QUINCY MA
— 617-774 none assigned yet which blocks → VERIZON NEW ENGLAND INC. 9102 QUINCY MA
— 617-775 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEWTON MA
— 617-776 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 SOMERVILLE MA
— 617-778 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J BOSTON MA
— 617-779 8XXX which blocks → VERIZON NEW ENGLAND INC. 9102 BRIGHTON MA
— 617-780 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
— 617-782 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 BRIGHTON MA
— 617-783 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 BRIGHTON MA
— 617-784 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
— 617-786 5XXX6XXX which blocks → VERIZON NEW ENGLAND INC. 9102 QUINCY MA
— 617-787 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 BRIGHTON MA
— 617-788 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 BOSTON MA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.