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 781
VERIZON NEW ENGLAND INC. 232
MCIMETRO ACCESS TRANSMISSION SERVICES LLC 92
PAETEC ITEL, LLC 69
LEVEL 3 COMMUNICATIONS, LLC - MA 59
TC SYSTEMS, INC. 57
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
— 781-754 1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → TC SYSTEMS, INC. 7135 BRYANTVL MA
— 781-756 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 WINCHESTER MA
— 781-757 8XXX9XXX which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E BURLINGTON MA
— 781-758 4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E READING MA
— 781-759 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → VERIZON NEW ENGLAND INC. 9102 WOBURN MA
— 781-760 none assigned yet which blocks → METROPCS, INC. 5562 WINCHESTER MA
— 781-761 3XXX4XXX5XXX8XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J LEXINGTON MA
— 781-762 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 NORWOOD MA
— 781-763 1XXX3XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → TC SYSTEMS, INC. 7135 ROCKLAND MA
— 781-764 none assigned yet which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E READING MA
— 781-765 2XXX which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E READING MA
— 781-766 1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E LEXINGTON MA
— 781-767 7XXX8XXX · 2 holders which blocks → VERIZON NEW ENGLAND INC. 9102 RANDOLPH MA
— 781-768 2XXX which blocks → VERIZON NEW ENGLAND INC. 9102 WALTHAM MA
— 781-769 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 NORWOOD MA
— 781-770 1XXX4XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 CANTON MA
— 781-771 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 LYNN MA
— 781-772 2XXX3XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J WELLESLEY MA
— 781-773 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J HULL MA
— 781-774 0XXX9XXX which blocks → VERIZON NEW ENGLAND INC. 9102 CANTON MA
— 781-775 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WALTHAM MA
— 781-776 1XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → RCN TELECOM SERVICES, INC. - MA 7619 LYNNFIELD MA
— 781-777 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → COMCAST IP PHONE, LLC 318J ARLINGTON MA
— 781-778 6XXX7XXX8XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LEXINGTON MA
— 781-779 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → COMCAST IP PHONE, LLC 318J READING MA
— 781-780 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 LYNN MA
— 781-782 2XXX3XXX4XXX8XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WOBURN MA
— 781-783 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J HINGHAM MA
— 781-784 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 SHARON MA
— 781-785 1XXX2XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 RANDOLPH MA
— 781-786 1XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 WALTHAM MA
— 781-787 5XXX7XXX8XXX · 2 holders which blocks → ONVOY, LLC - MA 892D WOBURN MA
— 781-788 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 WALTHAM MA
— 781-789 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 WEYMOUTH MA
— 781-790 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → COMCAST IP PHONE, LLC 318J WALTHAM MA
— 781-791 3XXX4XXX6XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BURLINGTON MA
— 781-792 9XXX which blocks → VERIZON NEW ENGLAND INC. 9102 ROCKLAND MA
— 781-793 4XXX7XXX8XXX · 2 holders which blocks → VERIZON NEW ENGLAND INC. 9102 SHARON MA
— 781-794 7XXX which blocks → VERIZON NEW ENGLAND INC. 9102 BRAINTREE MA
— 781-795 0XXX2XXX3XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 WALTHAM MA
— 781-796 0XXX2XXX3XXX4XXX6XXX7XXX · 3 holders which blocks → VERIZON NEW ENGLAND INC. 9102 BRAINTREE MA
— 781-799 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 STONEHAM MA
— 781-802 not yet reported which blocks → MA
— 781-803 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WEYMOUTH MA
— 781-807 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J RANDOLPH MA
— 781-808 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 REVERE MA
— 781-810 0XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J WALTHAM MA
— 781-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX MA
— 781-812 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → COMCAST IP PHONE, LLC 318J WEYMOUTH MA
— 781-814 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 XXXXXXXXXX MA

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.