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
2021-05-26 989-408 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MTPLEASANT MI
2021-05-24 989-468 9XXX which blocks → TON80 COMMUNICATIONS, LLC 516J ALMA MI
2021-05-19 989-407 0XXX4XXX7XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E ASHLEY MI
2021-05-13 989-406 0XXX4XXX · 2 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K FAIRVIEW MI
2021-04-14 989-902 0XXX1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H SAGINAW MI
2021-03-31 989-955 2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H UBLY MI
2021-03-22 989-901 0XXX1XXX9XXX which blocks → ONVOY SPECTRUM, LLC 624H ALMA MI
2021-03-01 989-371 0XXX1XXX3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 HARRISON MI
2021-02-23 989-505 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 4 holders which blocks → METROPCS, INC. 5562 GAYLORD MI
2021-02-08 989-699 0XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H ST LOUIS MI
2021-01-28 989-364 0–9 XXXall 10 · 6 holders which blocks → IP HORIZON LLC 515J SAGINAW MI
2021-01-08 989-557 2XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLCV - MI 543C HIGGINS LK MI
2021-01-08 989-788 2XXX3XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLCV - MI 543C SIXTYLAKES MI
2020-11-18 989-381 1XXX which blocks → WINN TELEPHONE COMPANY DBA WINN TELECOM - MI 0127 BLANCHARD MI
2020-10-23 989-360 0XXX1XXX2XXX3XXX4XXX · 4 holders which blocks → ONVOY, LLCV - MI 543C HEMLOCK MI
2020-09-30 989-357 0–9 XXXall 10 · 4 holders which blocks → HD CARRIER LLC 321J BAY CITY MI
2020-09-29 989-809 2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLCV - MI 543C SANFORD MI
2020-09-10 989-361 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → NUSO, LLC 478J AUBURN MI
2020-08-19 989-933 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 MTPLEASANT MI
2020-07-02 989-346 0XXX1XXX2XXX3XXX4XXX5XXX6XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 7279 MIO MI
2020-06-25 989-318 0–9 XXXall 10 · 5 holders which blocks → CSC WIRELESS, LLC 425J BAY CITY MI
2020-03-31 989-320 0–9 XXXall 10 · 4 holders which blocks → INTRADO COMMUNICATIONS, LLC 821C SAGINAW MI
2020-02-25 989-899 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H SAGINAW MI
2019-10-07 989-294 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MIDLAND MI
2019-05-02 989-988 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → COMMIO, LLC 939H SAGINAW MI
2019-04-22 989-353 0XXX3XXX · 2 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K CHESTER MI
2019-03-04 989-877 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TERRA NOVA TELECOM INC. 145J SAGINAW MI
2018-12-31 989-880 0XXX2XXX3XXX7XXX9XXX · 4 holders which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F ALPENA MI
2018-12-20 989-919 0XXX2XXX · 2 holders which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F ST HELEN MI
2018-10-31 989-931 0XXX2XXX3XXX4XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 7279 FARWELL MI
2018-09-25 989-589 0XXX1XXX2XXX5XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLCV - MI 543C CARO MI
2018-09-21 989-290 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 GRAYLING MI
2018-07-17 989-998 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OWOSSO MI
2018-06-29 989-263 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E BEAVERTON MI
2018-06-25 989-279 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E HOUGHTONLK MI
2018-05-01 989-985 0XXX2XXX3XXX5XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E FOWLERPWMO MI
2018-03-09 989-558 0XXX1XXX3XXX4XXX5XXX6XXX8XXX9XXX · 7 holders which blocks → VONAGE AMERICA LLC 197D SAGINAW MI
2018-02-26 989-651 0XXX which blocks → CHARTER IP ENABLED SERVICES, LLC 792K CHAPIN MI
2018-02-20 989-898 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLCV - MI 543C MIDLAND MI
2017-12-22 989-270 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLCV - MI 543C SAGINAW MI
2017-12-20 989-900 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLCV - MI 543C SAGINAW MI
2017-04-13 989-869 4XXX9XXX · 2 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K TWINING MI
2016-06-30 989-338 0XXX1XXX2XXX3XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLCV - MI 543C CARSONCITY MI
2016-03-14 989-264 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLCV - MI 543C MIDLAND MI
2016-03-07 989-267 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLCV - MI 543C ST HELEN MI
2016-03-02 989-260 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLCV - MI 543C EAST TAWAS MI
2015-10-09 989-800 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLCV - MI 543C LUPTON MI
2015-09-28 989-888 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLCV - MI 543C REESE MI
2015-09-16 989-300 0XXX1XXX2XXX3XXX4XXX5XXX8XXX · 3 holders which blocks → ONVOY, LLCV - MI 543C MCBRIDES MI
2015-09-16 989-500 0XXX2XXX5XXX6XXX · 2 holders which blocks → ONVOY, LLCV - MI 543C FENWICK 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.