NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

1 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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
— 989-289 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MTPLEASANT MI
— 989-291 1XXX2XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRONTIER NORTH, INC. - MI 0695 SHERIDAN MI
— 989-293 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 SAGINAW MI
— 989-295 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 SAGINAW MI
— 989-297 9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 SAGINAW MI
— 989-298 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 SAGINAW MI
— 989-302 4XXX5XXX8XXX9XXX · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 HOUGHTONLK MI
— 989-305 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 EAST TAWAS MI
— 989-309 1XXX2XXX3XXX4XXX7XXX8XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 REMUS MI
— 989-310 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 EAST TAWAS MI
— 989-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX MI
— 989-312 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WESTBRANCH MI
— 989-314 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 STANDISH MI
— 989-326 7XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 SAGINAW MI
— 989-328 0XXX3XXX4XXX5XXX8XXX9XXX · 5 holders which blocks → FRONTIER NORTH, INC. - MI 0695 SIDNEY MI
— 989-330 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MTPLEASANT MI
— 989-343 5XXX7XXX8XXX · 3 holders which blocks → MICHIGAN BELL TEL CO 9323 WESTBRANCH MI
— 989-344 not yet reported which blocks → FRONTIER NORTH, INC. - MI 0695 GRAYLING MI
— 989-345 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 WESTBRANCH MI
— 989-348 not yet reported which blocks → FRONTIER NORTH, INC. - MI 0695 GRAYLING MI
— 989-349 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLCV - MI 543C BIRCH RUN MI
— 989-350 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GAYLORD MI
— 989-352 0XXX2XXX3XXX4XXX9XXX · 5 holders which blocks → FRONTIER NORTH, INC. - MI 0695 LAKEVIEW MI
— 989-354 not yet reported which blocks → FRONTIER NORTH, INC. - MI 0695 ALPENA MI
— 989-356 not yet reported which blocks → FRONTIER NORTH, INC. - MI 0695 ALPENA MI
— 989-358 not yet reported which blocks → FRONTIER NORTH, INC. - MI 0695 ALPENA MI
— 989-362 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 EAST TAWAS MI
— 989-365 0XXX1XXX2XXX5XXX6XXX8XXX · 6 holders which blocks → FRONTIER NORTH, INC. - MI 0695 SIX LAKES MI
— 989-366 not yet reported which blocks → FRONTIER NORTH, INC. - MI 0695 HOUGHTONLK MI
— 989-370 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 GAYLORD MI
— 989-375 0XXX1XXX3XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → FRONTIER NORTH, INC. - MI 0695 ELKTON MI
— 989-379 0XXX1XXX5XXX6XXX8XXX · 5 holders which blocks → FRONTIER NORTH, INC. - MI 0695 LACHINE MI
— 989-382 0XXX1XXX2XXX6XXX · 4 holders which blocks → FRONTIER NORTH, INC. - MI 0695 BARRYTON MI
— 989-383 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FOWLERPWMO MI
— 989-384 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 SAGINAW MI
— 989-385 7XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 SAGINAW MI
— 989-386 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 CLARE MI
— 989-389 2XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → MICHIGAN BELL TEL CO 9323 ST HELEN MI
— 989-391 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → NUSO, LLC 732J BAY CITY MI
— 989-395 9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 SAGINAW MI
— 989-396 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 CLARE MI
— 989-397 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SAGINAW MI
— 989-399 not yet reported which blocks → PAETEC ITEL, LLC 829J SAGINAW MI
— 989-405 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 FREELAND MI
— 989-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX MI
— 989-412 1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 SAGINAW MI
— 989-413 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 OWOSSO MI
— 989-421 none assigned yet which blocks → PAETEC ITEL, LLC 829J CLARE MI
— 989-422 0XXX1XXX8XXX9XXX · 3 holders which blocks → FRONTIER NORTH, INC. - MI 0695 HOUGHTONLK MI
— 989-426 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 GLADWIN MI

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.