NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

1 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, last 30 days — NPA 989
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 1
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
— 989-573 5XXX6XXX7XXX8XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 FREELAND MI
— 989-574 1XXX2XXX3XXX4XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 SAGINAW MI
— 989-576 3XXX4XXX5XXX6XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ALMA MI
— 989-577 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLCV - MI 543C SAGINAW MI
— 989-578 3XXX5XXX6XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 GLADWIN MI
— 989-583 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 SAGINAW MI
— 989-584 1XXX2XXX4XXX5XXX7XXX8XXX9XXX · 7 holders which blocks → FRONTIER NORTH, INC. - MI 0695 CARSONCITY MI
— 989-585 0XXX1XXX2XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → BRIGHTSPEED OF CENTRAL MICHIGAN, INC 0671 BRANT MI
— 989-587 8XXX which blocks → WESTPHALIA TEL. CO. 0735 WESTPHALIA MI
— 989-588 1XXX which blocks → MICHIGAN BELL TEL CO 9323 FARWELL MI
— 989-590 1XXX4XXX5XXX6XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ALPENA MI
— 989-591 not yet reported which blocks → SPOK, INC. 6630 ALPENA MI
— 989-593 0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → FRONTIER NORTH, INC. - MI 0695 FOWLERPWMO MI
— 989-594 not yet reported which blocks → SPOK, INC. 6630 GAYLORD MI
— 989-595 0XXX4XXX8XXX9XXX · 4 holders which blocks → FRONTIER NORTH, INC. - MI 0695 LONG LAKE MI
— 989-598 8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 SAGINAW MI
— 989-599 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 SAGINAW MI
— 989-601 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ITHACA MI
— 989-603 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 ALPENA MI
— 989-610 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 SAGINAW MI
— 989-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX MI
— 989-612 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 MTPLEASANT MI
— 989-613 1XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SHERIDAN MI
— 989-614 2XXX3XXX4XXX5XXX8XXX9XXX · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 GAYLORD MI
— 989-615 4XXX5XXX which blocks → METROPCS, INC. 5562 MIDLAND MI
— 989-619 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 GAYLORD MI
— 989-620 9XXX which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 ALMA MI
— 989-621 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MTPLEASANT MI
— 989-624 2XXX3XXX7XXX · 3 holders which blocks → MICHIGAN BELL TEL CO 9323 BIRCH RUN MI
— 989-631 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 MIDLAND MI
— 989-633 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 MIDLAND MI
— 989-634 1XXX2XXX3XXX4XXX6XXX7XXX · 5 holders which blocks → FRONTIER NORTH, INC. - MI 0695 BANCROFT MI
— 989-635 not yet reported which blocks → BRIGHTSPEED OF MICHIGAN, LLC 0702 MARLETTE MI
— 989-636 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 MIDLAND MI
— 989-637 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRONTIER NORTH, INC. - MI 0695 PALO MI
— 989-638 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 MIDLAND MI
— 989-640 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ST JOHNS MI
— 989-642 0XXX1XXX · 2 holders which blocks → FRONTIER NORTH, INC. - MI 0695 HEMLOCK MI
— 989-643 1XXX3XXX4XXX · 2 holders which blocks → FRONTIER NORTH, INC. - MI 0695 MERRILL MI
— 989-644 0XXX1XXX7XXX9XXX · 4 holders which blocks → FRONTIER NORTH, INC. - MI 0695 WEIDMAN MI
— 989-652 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 FRANKENMTH MI
— 989-653 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BRIGHTSPEED OF CENTRAL MICHIGAN, INC 0671 OMER MI
— 989-654 4XXX8XXX · 2 holders which blocks → FRONTIER MIDSTATES, INC. - MI 0681 STERLING MI
— 989-656 1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → MICHIGAN BELL TEL CO 9323 BAY PORT MI
— 989-657 7XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ALPENA MI
— 989-658 0XXX1XXX3XXX4XXX5XXX6XXX7XXX9XXX · 7 holders which blocks → MICHIGAN BELL TEL CO 9323 UBLY MI
— 989-659 4XXX5XXX8XXX9XXX · 2 holders which blocks → WOLVERINE TEL. CO. 0738 MUNGER MI
— 989-660 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MAYVILLE MI
— 989-661 not yet reported which blocks → FARMERS MUTUAL OF CHAPIN DBA CHAPIN TELEPHONE CO. 0694 CHAPIN MI
— 989-662 1XXX3XXX5XXX8XXX9XXX · 4 holders which blocks → MICHIGAN BELL TEL CO 9323 AUBURN MI

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.