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
— 781-817 0XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → TC SYSTEMS, INC. 7135 BRAINTREE MA
— 781-818 0XXX1XXX3XXX5XXX6XXX8XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 STOUGHTON MA
— 781-819 1XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E ARLINGTON MA
— 781-820 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 SAUGUS MA
— 781-821 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 CANTON MA
— 781-824 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 2 holders which blocks → RCN TELECOM SERVICES, INC. - MA 7619 RANDOLPH MA
— 781-825 1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BURLINGTON MA
— 781-826 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 HANOVER MA
— 781-827 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 MEDFORD MA
— 781-828 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 CANTON MA
— 781-829 3XXX5XXX · 2 holders which blocks → VERIZON NEW ENGLAND INC. 9102 HANOVER MA
— 781-830 none assigned yet which blocks → VERIZON NEW ENGLAND INC. 9102 CANTON MA
— 781-831 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J KINGSTON MA
— 781-832 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 STONEHAM MA
— 781-833 0XXX which blocks → VERIZON NEW ENGLAND INC. 9102 WALTHAM MA
— 781-834 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 MARSHFIELD MA
— 781-835 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → TC SYSTEMS, INC. 7135 STONEHAM MA
— 781-836 0XXX1XXX5XXX8XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 HINGHAM MA
— 781-837 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 MARSHFIELD MA
— 781-838 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J WINCHESTER MA
— 781-839 0XXX9XXX · 2 holders which blocks → VERIZON NEW ENGLAND INC. 9102 WALTHAM MA
— 781-840 1XXX3XXX4XXX7XXX8XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 STOUGHTON MA
— 781-841 none assigned yet which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E LEXINGTON MA
— 781-842 not yet reported which blocks → COMCAST IP PHONE, LLC 318J LYNN MA
— 781-843 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 BRAINTREE MA
— 781-844 none assigned yet which blocks → METROPCS, INC. 5562 ARLINGTON MA
— 781-845 none assigned yet which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E LEXINGTON MA
— 781-846 1XXX4XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 KINGSTON MA
— 781-847 0XXX1XXX5XXX6XXX7XXX · 3 holders which blocks → TC SYSTEMS, INC. 7135 STOUGHTON MA
— 781-848 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 BRAINTREE MA
— 781-849 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 BRAINTREE MA
— 781-850 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J STONEHAM MA
— 781-851 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J MALDEN MA
— 781-852 none assigned yet which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BURLINGTON MA
— 781-853 1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → VERIZON NEW ENGLAND INC. 9102 REVERE MA
— 781-854 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 SAUGUS MA
— 781-857 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW ENGLAND INC. 9102 ROCKLAND MA
— 781-858 none assigned yet which blocks → METROPCS, INC. 5562 REVERE MA
— 781-860 2XXX3XXX which blocks → VERIZON NEW ENGLAND INC. 9102 LEXINGTON MA
— 781-861 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 LEXINGTON MA
— 781-862 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 LEXINGTON MA
— 781-863 7XXX which blocks → VERIZON NEW ENGLAND INC. 9102 LEXINGTON MA
— 781-864 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WALTHAM MA
— 781-865 0XXX1XXX · 2 holders which blocks → VERIZON NEW ENGLAND INC. 9102 WOBURN MA
— 781-867 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → RCN TELECOM SERVICES, INC. - MA 7619 SHARON MA
— 781-869 0XXX2XXX · 2 holders which blocks → TC SYSTEMS, INC. 7135 LEXINGTON MA
— 781-870 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → TC SYSTEMS, INC. 7135 MALDEN MA
— 781-871 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 ROCKLAND MA
— 781-872 1XXX2XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 READING MA
— 781-873 2XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J MALDEN 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.