NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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 989
FRONTIER NORTH, INC. - MI 91
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
— 989-723 not yet reported which blocks → FRONTIER NORTH, INC. - MI 0695 OWOSSO MI
— 989-724 0XXX1XXX2XXX3XXX4XXX8XXX · 6 holders which blocks → FRONTIER NORTH, INC. - MI 0695 HARRISVL MI
— 989-725 not yet reported which blocks → FRONTIER NORTH, INC. - MI 0695 OWOSSO MI
— 989-727 0XXX1XXX7XXX · 3 holders which blocks → FRONTIER NORTH, INC. - MI 0695 HUBBARD LK MI
— 989-729 not yet reported which blocks → FRONTIER NORTH, INC. - MI 0695 OWOSSO MI
— 989-731 not yet reported which blocks → FRONTIER NORTH, INC. - MI 0695 GAYLORD MI
— 989-732 not yet reported which blocks → FRONTIER NORTH, INC. - MI 0695 GAYLORD MI
— 989-733 0XXX1XXX3XXX · 3 holders which blocks → FRONTIER NORTH, INC. - MI 0695 ONAWAY MI
— 989-734 1XXX which blocks → FRONTIER NORTH, INC. - MI 0695 ROGERSCITY MI
— 989-736 0XXX2XXX5XXX · 3 holders which blocks → FRONTIER NORTH, INC. - MI 0695 LINCOLN MI
— 989-742 1XXX5XXX6XXX9XXX · 4 holders which blocks → FRONTIER NORTH, INC. - MI 0695 HILLMAN MI
— 989-743 0XXX7XXX · 2 holders which blocks → FRONTIER NORTH, INC. - MI 0695 OWOSSO MI
— 989-761 0XXX1XXX2XXX3XXX4XXX · 4 holders which blocks → FRONTIER NORTH, INC. - MI 0695 CLIFFORD MI
— 989-762 0XXX1XXX2XXX3XXX4XXX6XXX7XXX · 6 holders which blocks → FRONTIER NORTH, INC. - MI 0695 MCBRIDES MI
— 989-766 0XXX1XXX3XXX4XXX6XXX7XXX9XXX · 6 holders which blocks → FRONTIER NORTH, INC. - MI 0695 POSEN MI
— 989-772 not yet reported which blocks → FRONTIER NORTH, INC. - MI 0695 MTPLEASANT MI
— 989-773 not yet reported which blocks → FRONTIER NORTH, INC. - MI 0695 MTPLEASANT MI
— 989-774 not yet reported which blocks → FRONTIER NORTH, INC. - MI 0695 MTPLEASANT MI
— 989-775 not yet reported which blocks → FRONTIER NORTH, INC. - MI 0695 MTPLEASANT MI
— 989-779 not yet reported which blocks → FRONTIER NORTH, INC. - MI 0695 MTPLEASANT MI
— 989-785 0XXX1XXX7XXX9XXX · 3 holders which blocks → FRONTIER NORTH, INC. - MI 0695 ATLANTA MI
— 989-786 0XXX8XXX · 2 holders which blocks → FRONTIER NORTH, INC. - MI 0695 LEWISTON MI
— 989-821 1XXX which blocks → FRONTIER NORTH, INC. - MI 0695 HIGGINS LK MI
— 989-826 0XXX4XXX7XXX9XXX · 4 holders which blocks → FRONTIER NORTH, INC. - MI 0695 MIO MI
— 989-828 1XXX9XXX · 2 holders which blocks → FRONTIER NORTH, INC. - MI 0695 SHEPHERD MI
— 989-831 1XXX6XXX · 2 holders which blocks → FRONTIER NORTH, INC. - MI 0695 STANTON MI
— 989-833 0XXX1XXX3XXX4XXX6XXX8XXX9XXX · 7 holders which blocks → FRONTIER NORTH, INC. - MI 0695 RIVERDALE MI
— 989-834 3XXX4XXX8XXX · 3 holders which blocks → FRONTIER NORTH, INC. - MI 0695 OVID MI
— 989-838 0XXX1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRONTIER NORTH, INC. - MI 0695 POMPEII MI
— 989-842 0XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → FRONTIER NORTH, INC. - MI 0695 BRECKENRDG MI
— 989-847 0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRONTIER NORTH, INC. - MI 0695 ASHLEY MI
— 989-848 0XXX1XXX3XXX4XXX6XXX9XXX · 4 holders which blocks → FRONTIER NORTH, INC. - MI 0695 FAIRVIEW MI
— 989-855 0XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → FRONTIER NORTH, INC. - MI 0695 MUIR MI
— 989-856 0XXX1XXX5XXX6XXX · 4 holders which blocks → FRONTIER NORTH, INC. - MI 0695 CASEVILLE MI
— 989-862 2XXX6XXX8XXX · 2 holders which blocks → FRONTIER NORTH, INC. - MI 0695 ELSIE MI
— 989-864 0XXX1XXX2XXX4XXX6XXX9XXX · 5 holders which blocks → FRONTIER NORTH, INC. - MI 0695 MINDENCITY MI
— 989-872 not yet reported which blocks → FRONTIER NORTH, INC. - MI 0695 CASS CITY MI
— 989-875 0XXX9XXX · 2 holders which blocks → FRONTIER NORTH, INC. - MI 0695 ITHACA MI
— 989-967 0XXX4XXX5XXX6XXX7XXX · 5 holders which blocks → FRONTIER NORTH, INC. - MI 0695 REMUS MI
— 989-981 1XXX7XXX8XXX9XXX · 4 holders which blocks → FRONTIER NORTH, INC. - MI 0695 HUBBARDSTN MI
— 989-983 0XXX5XXX8XXX · 2 holders which blocks → FRONTIER NORTH, INC. - MI 0695 VANDERBILT MI

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.