NumberResearch Membership · Data 09/23/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/23/2026

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
8X8, INC. 39
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 15
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
— 906-283 not yet reported which blocks → BRIGHTSPEED OF UPPER MICHIGAN, INC. 0689 GULLIVER MI
— 906-288 not yet reported which blocks → UPPER PENINSULA TEL. CO. 0732 DONKEN MI
— 906-289 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → MICHIGAN BELL TEL CO 9323 KEWEENAW MI
— 906-292 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → MICHIGAN BELL TEL CO 9323 BREVORT MI
— 906-293 7XXX which blocks → MICHIGAN BELL TEL CO 9323 NEWBERRY MI
— 906-296 2XXX3XXX4XXX5XXX6XXX7XXX · 5 holders which blocks → MICHIGAN BELL TEL CO 9323 LAKELINDEN MI
— 906-297 not yet reported which blocks → BRIGHTSPEED OF UPPER MICHIGAN, INC. 0689 DE TOUR MI
— 906-299 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOUGHTON MI
— 906-302 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J IRON MT MI
— 906-303 not yet reported which blocks → RANGE TELECOMMUNICATIONS 6695 CALUMET MI
— 906-304 not yet reported which blocks → RANGE TELECOMMUNICATIONS 6695 CARNEY MI
— 906-305 not yet reported which blocks → RANGE TELECOMMUNICATIONS 6695 CEDARVILLE MI
— 906-307 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J IRONWOOD MI
— 906-308 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J IRON RIVER MI
— 906-309 0XXX3XXX7XXX · 3 holders which blocks → ONVOY, LLCV - MI 543C HERMANSVL MI
— 906-310 0XXX1XXX2XXX3XXX4XXX · 3 holders which blocks → ONVOY, LLCV - MI 543C CEDARVILLE MI
— 906-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX MI
— 906-312 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J KEWEENAW MI
— 906-314 not yet reported which blocks → NEW CELL DBA CELLCOM 6692 ESCANABA MI
— 906-315 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J MARQUETTE MI
— 906-317 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J MENOMINEE MI
— 906-321 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J NEWBERRY MI
— 906-323 0XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → MICHIGAN BELL TEL CO 9323 MICHIGAMME MI
— 906-324 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J POWERS MI
— 906-325 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J ROCK MI
— 906-326 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J STEPHENSON MI
— 906-327 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J SALTSTMARI MI
— 906-328 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J ST IGNACE MI
— 906-329 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J WATERSMEET MI
— 906-331 0XXX1XXX2XXX7XXX · 3 holders which blocks → ONVOY, LLCV - MI 543C KEWEENAW MI
— 906-334 not yet reported which blocks → BARAGA TEL. CO. 0675 TAPIOLA MI
— 906-337 none assigned yet which blocks → MICHIGAN BELL TEL CO 9323 CALUMET MI
— 906-338 not yet reported which blocks → BARAGA TEL. CO. 0675 ALSTON MI
— 906-339 1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → MICHIGAN BELL TEL CO 9323 CHAMPION MI
— 906-341 not yet reported which blocks → BRIGHTSPEED OF UPPER MICHIGAN, INC. 0689 MANISTIQUE MI
— 906-343 not yet reported which blocks → CHATHAM TEL. CO. 0685 SAND RIVER MI
— 906-345 1XXX2XXX3XXX4XXX6XXX7XXX · 6 holders which blocks → MICHIGAN BELL TEL CO 9323 BIG BAY MI
— 906-346 1XXX2XXX · 2 holders which blocks → MICHIGAN BELL TEL CO 9323 GWINN MI
— 906-353 not yet reported which blocks → BARAGA TEL. CO. 0675 BARAGA MI
— 906-355 not yet reported which blocks → MIDWAY TEL. CO. 0711 WATTON MI
— 906-356 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 7 holders which blocks → MICHIGAN BELL TEL CO 9323 ROCK MI
— 906-358 2XXX7XXX · 2 holders which blocks → MICHIGAN BELL TEL CO 9323 WATERSMEET MI
— 906-359 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → MICHIGAN BELL TEL CO 9323 PERKINS MI
— 906-360 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MARQUETTE MI
— 906-361 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MARQUETTE MI
— 906-362 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MARQUETTE MI
— 906-364 6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 IRONWOOD MI
— 906-365 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BERGLAND MI
— 906-366 2XXX5XXX6XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WATERSMEET MI
— 906-367 7XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 IRON RIVER MI

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.