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
— 781-686 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → COMCAST IP PHONE, LLC 318J DEDHAM MA
— 781-687 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 LEXINGTON MA
— 781-688 3XXX4XXX6XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 NORWOOD MA
— 781-689 1XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 KINGSTON MA
— 781-690 8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DEDHAM MA
— 781-691 1XXX2XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → METROPCS, INC. 5562 LYNN MA
— 781-693 8XXX9XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WALTHAM MA
— 781-694 1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 WELLESLEY MA
— 781-695 0XXX1XXX6XXX7XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 STOUGHTON MA
— 781-696 none assigned yet which blocks → METROPCS, INC. 5562 WOBURN MA
— 781-697 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WALTHAM MA
— 781-698 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LEXINGTON MA
— 781-700 not yet reported which blocks → MA
— 781-701 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J WALTHAM MA
— 781-705 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E WELLESLEY MA
— 781-707 6XXX8XXX which blocks → TC SYSTEMS, INC. 7135 NEEDHAM MA
— 781-708 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 DEDHAM MA
— 781-710 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 LYNN MA
— 781-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX MA
— 781-712 6XXX7XXX8XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MELROSE MA
— 781-713 0XXX1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 CANTON MA
— 781-714 not yet reported which blocks → MA
— 781-716 5XXX6XXX7XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WAKEFIELD MA
— 781-717 0XXX1XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → RCN TELECOM SERVICES, INC. - MA 7619 WINCHESTER MA
— 781-718 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 LYNN MA
— 781-719 2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 NEEDHAM MA
— 781-721 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 WINCHESTER MA
— 781-722 7XXX8XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J WINCHESTER MA
— 781-724 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WEYMOUTH MA
— 781-725 1XXX4XXX5XXX6XXX · 3 holders which blocks → PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F NORWOOD MA
— 781-726 0XXX1XXX2XXX3XXX4XXX5XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J NEEDHAM MA
— 781-729 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 WINCHESTER MA
— 781-730 2XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BURLINGTON MA
— 781-731 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → RCN TELECOM SERVICES, INC. - MA 7619 LYNN MA
— 781-734 6XXX7XXX9XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 LEXINGTON MA
— 781-735 3XXX4XXX7XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HINGHAM MA
— 781-736 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 WALTHAM MA
— 781-739 1XXX8XXX which blocks → PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F CANTON MA
— 781-740 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 HINGHAM MA
— 781-741 0XXX which blocks → VERIZON NEW ENGLAND INC. 9102 HINGHAM MA
— 781-742 0XXX1XXX3XXX4XXX5XXX6XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 DEDHAM MA
— 781-743 none assigned yet which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BURLINGTON MA
— 781-744 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 BURLINGTON MA
— 781-746 6XXX7XXX8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J CANTON MA
— 781-748 4XXX which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E LEXINGTON MA
— 781-749 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 HINGHAM MA
— 781-750 0XXX1XXX9XXX · 2 holders which blocks → RCN TELECOM SERVICES, INC. - MA 7619 BURLINGTON MA
— 781-751 0XXX1XXX2XXX7XXX · 3 holders which blocks → VERIZON NEW ENGLAND INC. 9102 DEDHAM MA
— 781-752 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 DEDHAM MA
— 781-753 0XXX1XXX5XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 ROCKLAND 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.