NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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, last 30 days
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
ONVOY, LLC - CA 19
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
— 617-789 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
— 617-832 5XXX which blocks → VERIZON NEW ENGLAND INC. 9102 BOSTON MA
— 617-833 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J HYDE PARK MA
— 617-834 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
— 617-835 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
— 617-836 not yet reported which blocks → NORFOLK COUNTY INTERNET, INC. 6083 CAMBRIDGE MA
— 617-837 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 QUINCY MA
— 617-838 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
— 617-839 none assigned yet which blocks → METROPCS, INC. 5562 BOSTON MA
— 617-840 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
— 617-841 2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 WINTHROP MA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.