NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

2 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 947
NEW CINGULAR WIRELESS PCS, LLC - IL 2
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
2022-02-25 947-546 0XXX1XXX3XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J WALLEDLAKE MI
2022-02-24 947-339 0XXX1XXX2XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NORTHVILLE MI
2022-02-11 947-259 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SOUTHFIELD MI
2022-01-27 947-436 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J TROY MI
2022-01-25 947-334 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BIRMINGHAM MI
2022-01-11 947-263 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J LAKE ORION MI
2022-01-11 947-362 0–9 XXXall 10 · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SOUTH LYON MI
2022-01-11 947-466 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MILFDWH LK MI
2022-01-10 947-243 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 TROY MI
2022-01-07 947-426 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SOUTHFIELD MI
2022-01-07 947-837 0XXX2XXX3XXX4XXX5XXX7XXX8XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J W BLOOMFLD MI
2022-01-05 947-241 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SOUTHFIELD MI
2022-01-04 947-245 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J DRAYTON PL MI
2022-01-04 947-249 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J HOLLY MI
2022-01-04 947-251 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J OXFORD MI
2022-01-04 947-257 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J PONTIAC MI
2021-11-24 947-529 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H BIRMINGHAM MI
2021-11-01 947-238 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SOUTHFIELD MI
2021-10-19 947-242 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLCV - MI 543C W BLOOMFLD MI
2021-10-15 947-729 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 ROYAL OAK MI
2021-10-07 947-944 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 FARMINGTON MI
2021-10-06 947-955 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 PONTIAC MI
2021-10-05 947-524 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E ROYAL OAK MI
2021-09-08 947-240 5XXX6XXX7XXX8XXX9XXX which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 W BLOOMFLD MI
2021-06-28 947-239 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 CLARKSTON MI
2021-05-26 947-236 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 ROCHESTER MI
2021-05-19 947-247 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLCV - MI 543C HOLLY MI
2021-05-06 947-895 0–9 XXXall 10 · 3 holders which blocks → TWILIO INTERNATIONAL, INC. 506J SOUTHFIELD MI
2021-04-12 947-327 3XXX which blocks → TON80 COMMUNICATIONS, LLC 516J ORTONVILLE MI
2021-04-08 947-376 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J TROY MI
2021-04-02 947-336 0XXX1XXX7XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H NORTHVILLE MI
2021-04-02 947-348 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H SOUTH LYON MI
2021-03-08 947-235 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SOUTHFIELD MI
2021-03-02 947-366 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J FARMINGTON MI
2021-02-19 947-345 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → FRACTEL, LLC 965H OXFORD MI
2021-01-12 947-272 0–9 XXXwhole prefix which blocks → ONVOY, LLCV - MI 543C PONTIAC MI
2021-01-05 947-244 2XXX3XXX4XXX5XXX6XXX9XXX · 3 holders which blocks → ONVOY, LLCV - MI 543C ORTONVILLE MI
2020-12-21 947-233 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 NORTHVILLE MI
2020-12-21 947-234 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 SOUTHFIELD MI
2020-12-18 947-232 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 PONTIAC MI
2020-12-17 947-479 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLCV - MI 543C ROCHESTER MI
2020-12-10 947-229 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 CLARKSTON MI
2020-11-24 947-227 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLCV - MI 543C WALLEDLAKE MI
2020-11-09 947-237 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 BIRMINGHAM MI
2020-09-21 947-228 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E FARMINGTON MI
2020-09-17 947-957 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLCV - MI 543C PONTIAC MI
2020-08-25 947-881 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E SOUTHFIELD MI
2020-08-17 947-226 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 AUBURN HTS MI
2020-07-27 947-225 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 HOLLY MI
2020-06-25 947-224 0–9 XXXall 10 · 5 holders which blocks → CSC WIRELESS, LLC 425J SOUTHFIELD 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.