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 617
VERIZON NEW ENGLAND INC. 334
MCIMETRO ACCESS TRANSMISSION SERVICES LLC 71
NEW CINGULAR WIRELESS PCS, LLC - DC 68
PAETEC ITEL, LLC 44
TC SYSTEMS, INC. 41
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
— 617-776 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
— 617-789 0XXX6XXX8XXX9XXX which blocks → VERIZON NEW ENGLAND INC. 9102 BRIGHTON MA
— 617-790 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 BOSTON MA
— 617-791 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SAUGUS MA
— 617-792 not yet reported which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 ROXBURY MA
— 617-793 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → TC SYSTEMS, INC. 7135 QUINCY MA
— 617-794 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
— 617-795 3XXX4XXX6XXX · 2 holders which blocks → RCN TELECOM SERVICES, INC. - MA 7619 NEWTON MA
— 617-796 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 NEWTON MA
— 617-797 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 SAUGUS MA
— 617-798 8XXX9XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E CAMBRIDGE MA
— 617-799 none assigned yet which blocks → METROPCS, INC. 5562 BOSTON MA
— 617-800 0XXX1XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → RCN TELECOM SERVICES, INC. - MA 7619 CAMBRIDGE MA
— 617-801 9XXX which blocks → PAETEC ITEL, LLC 829J QUINCY MA
— 617-802 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW ENGLAND INC. 9102 CAMBRIDGE MA
— 617-803 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CAMBRIDGE MA
— 617-804 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E QUINCY MA
— 617-805 not yet reported which blocks → MA
— 617-806 0XXX5XXX6XXX · 3 holders which blocks → VERIZON NEW ENGLAND INC. 9102 CAMBRIDGE MA
— 617-808 not yet reported which blocks → MA
— 617-809 not yet reported which blocks → MA
— 617-810 not yet reported which blocks → MA
— 617-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX MA
— 617-812 not yet reported which blocks → ONVOY, LLC - MA 892D CAMBRIDGE MA
— 617-813 not yet reported which blocks → MA
— 617-814 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 BOSTON MA
— 617-815 not yet reported which blocks → MA
— 617-816 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
— 617-817 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BRIGHTON MA
— 617-818 not yet reported which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
— 617-819 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CHELSEA MA
— 617-821 none assigned yet which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 CAMBRIDGE MA
— 617-822 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 DORCHESTER MA
— 617-823 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
— 617-824 0XXX which blocks → TC SYSTEMS, INC. 7135 BOSTON MA
— 617-825 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 DORCHESTER MA
— 617-826 1XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BELMONT MA
— 617-827 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WEYMOUTH MA
— 617-828 none assigned yet which blocks → METROPCS, INC. 5562 BOSTON MA
— 617-829 1XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → HD CARRIER LLC 321J QUINCY MA
— 617-831 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 NEWTON 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.