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
— 781-629 0XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J REVERE MA
— 781-630 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → RCN TELECOM SERVICES, INC. - MA 7619 HINGHAM MA
— 781-631 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 MARBLEHEAD MA
— 781-632 not yet reported which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 LYNN MA
— 781-635 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → TC SYSTEMS, INC. 7135 NORWELL MA
— 781-636 7XXX8XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 DEDHAM MA
— 781-637 not yet reported which blocks → NORFOLK COUNTY INTERNET, INC. 6083 WEYMOUTH MA
— 781-638 none assigned yet which blocks → TC SYSTEMS, INC. 7135 WOBURN MA
— 781-639 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 MARBLEHEAD MA
— 781-640 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WOBURN MA
— 781-641 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 ARLINGTON MA
— 781-642 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 WALTHAM MA
— 781-643 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 ARLINGTON MA
— 781-644 not yet reported which blocks → PAETEC ITEL, LLC 829J NEEDHAM MA
— 781-645 2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ARLINGTON MA
— 781-646 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 ARLINGTON MA
— 781-647 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 WALTHAM MA
— 781-648 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 ARLINGTON MA
— 781-649 4XXX7XXX8XXX9XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E READING MA
— 781-651 0XXX1XXX2XXX5XXX6XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 LYNNFIELD MA
— 781-652 1XXX3XXX4XXX5XXX9XXX · 3 holders which blocks → RCN TELECOM SERVICES, INC. - MA 7619 LEXINGTON MA
— 781-653 1XXX4XXX5XXX6XXX7XXX · 2 holders which blocks → TC SYSTEMS, INC. 7135 BURLINGTON MA
— 781-654 1XXX5XXX6XXX7XXX9XXX which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 BRAINTREE MA
— 781-655 1XXX8XXX9XXX · 2 holders which blocks → VERIZON NEW ENGLAND INC. 9102 MEDFORD MA
— 781-657 3XXX4XXX5XXX6XXX7XXX8XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 NEEDHAM MA
— 781-658 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MEDFORD MA
— 781-659 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 NORWELL MA
— 781-661 1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → ONVOY, LLC - MA 892D MALDEN MA
— 781-662 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 MELROSE MA
— 781-663 not yet reported which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WALTHAM MA
— 781-664 0XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J BRAINTREE MA
— 781-665 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 MELROSE MA
— 781-667 1XXX5XXX6XXX7XXX9XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E MALDEN MA
— 781-668 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 NEEDHAM MA
— 781-669 3XXX which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E LEXINGTON MA
— 781-670 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → VERIZON NEW ENGLAND INC. 9102 READING MA
— 781-671 4XXX which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E LEXINGTON MA
— 781-672 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 WALTHAM MA
— 781-673 none assigned yet which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E READING MA
— 781-674 6XXX which blocks → VERIZON NEW ENGLAND INC. 9102 LEXINGTON MA
— 781-675 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J NEEDHAM MA
— 781-676 2XXX3XXX4XXX9XXX · 3 holders which blocks → VERIZON NEW ENGLAND INC. 9102 LEXINGTON MA
— 781-677 0XXX4XXX · 2 holders which blocks → VERIZON NEW ENGLAND INC. 9102 READING MA
— 781-679 1XXX3XXX4XXX5XXX7XXX8XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 KINGSTON MA
— 781-680 1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → TC SYSTEMS, INC. 7135 NORWOOD MA
— 781-681 none assigned yet which blocks → VERIZON NEW ENGLAND INC. 9102 ROCKLAND MA
— 781-682 2XXX which blocks → VERIZON NEW ENGLAND INC. 9102 WEYMOUTH MA
— 781-683 0XXX1XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 WAKEFIELD MA
— 781-684 2XXX9XXX · 2 holders which blocks → VERIZON NEW ENGLAND INC. 9102 WALTHAM MA
— 781-685 8XXX which blocks → TC SYSTEMS, INC. 7135 BURLINGTON 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.