Recent prefix assignments

1 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/21/2026

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 906

OPENTACT INC. 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

Recent NPA-NXX prefix assignments
Assigned	NPA-NXX	Thousands-blocks taken (last-4 opening)	Code holder	OCN	Rate center	State
—	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.	4632	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
—	906-368	2XXX4XXX6XXX9XXX · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	POWERS	MI
—	906-369	5XXX6XXX9XXX · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	CALUMET	MI
—	906-370	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	HOUGHTON	MI
—	906-371	4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	CHAMPION	MI
—	906-372	0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks →	MICHIGAN BELL TEL CO	9323	GWINN	MI
—	906-373	2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	BIG BAY	MI
—	906-374	1XXX2XXX3XXX · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	STEPHENSON	MI
—	906-375	0XXX1XXX7XXX8XXX · 4 holders which blocks →	ONVOY, LLCV - MI	543C	CRYSTALFLS	MI
—	906-376	0XXX1XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks →	MICHIGAN BELL TEL CO	9323	REPUBLIC	MI
—	906-379	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MI	6120	SALTSTMARI	MI
—	906-381	not yet reported which blocks →	RANGE TELECOMMUNICATIONS	6695	CHATHAM	MI
—	906-384	1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks →	MICHIGAN BELL TEL CO	9323	CORNELL	MI
—	906-387	not yet reported which blocks →	HIAWATHA TEL. CO.	0713	MUNISING	MI

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.