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
2026-09-11	906-873	4XXX which blocks →	OPENTACT INC.	824J	MARQUETTE	MI
2026-04-22	906-348	9XXX which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	SALTSTMARI	MI
2026-03-09	906-342	9XXX which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	IRON MT	MI
2026-03-05	906-340	0XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	IRON MT	MI
2026-01-26	906-336	0XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	IRONWOOD	MI
2026-01-22	906-888	8XXX which blocks →	AHOI LLC	883K	NORWAY	MI
2026-01-08	906-335	0XXX which blocks →	WAVENATION, LLC	700J	MARQUETTE	MI
2025-05-13	906-320	0XXX which blocks →	METRO SOUTHWEST PCS, LLP	9759	MENOMINEE	MI
2024-10-17	906-912	0XXX which blocks →	ONVOY SPECTRUM, LLC	624H	AU TRAIN	MI
2024-10-17	906-913	0XXX which blocks →	ONVOY SPECTRUM, LLC	624H	GWINN	MI
2024-02-21	906-319	0XXX1XXX2XXX3XXX8XXX9XXX · 4 holders which blocks →	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	HOUGHTON	MI
2024-02-16	906-318	3XXX7XXX8XXX9XXX · 3 holders which blocks →	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	ESCANABA	MI
2023-08-29	906-300	0XXX3XXX7XXX · 3 holders which blocks →	AT&T ENTERPRISES, LLC	516C	REPUBLIC	MI
2023-08-29	906-306	3XXX7XXX · 2 holders which blocks →	AT&T ENTERPRISES, LLC	516C	PERKINS	MI
2023-08-29	906-316	0XXX1XXX3XXX7XXX · 4 holders which blocks →	AT&T ENTERPRISES, LLC	516C	ENGADINE	MI
2023-03-21	906-260	1XXX2XXX · 2 holders which blocks →	COMCAST IP PHONE, LLC	318J	RUDYARD	MI
2023-01-31	906-200	0–9 XXXall 10 · 4 holders which blocks →	NUSO, LLC	732J	IRON MT	MI
2022-02-16	906-895	8XXX which blocks →	TWILIO INTERNATIONAL, INC.	506J	MARQUETTE	MI
2021-12-02	906-351	1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 2 holders which blocks →	NUSO, LLC	478J	MARQUETTE	MI
2021-09-17	906-333	3XXX which blocks →	SKYE TELECOM LLC DBA SKYETEL	622J	MARQUETTE	MI
2021-06-25	906-267	1XXX2XXX7XXX · 3 holders which blocks →	ONVOY, LLCV - MI	543C	CURTIS	MI
2021-06-25	906-268	2XXX8XXX9XXX · 2 holders which blocks →	ONVOY, LLCV - MI	543C	LAKELINDEN	MI
2021-06-25	906-276	2XXX6XXX · 2 holders which blocks →	ONVOY, LLCV - MI	543C	RAPIDRIVER	MI
2021-06-15	906-332	2XXX3XXX which blocks →	ONVOY, LLCV - MI	543C	MANISTIQUE	MI
2021-04-14	906-901	0–9 XXXwhole prefix which blocks →	ONVOY SPECTRUM, LLC	624H	MARQUETTE	MI
2021-01-07	906-301	0XXX2XXX3XXX4XXX7XXX · 3 holders which blocks →	ONVOY, LLCV - MI	543C	MICHIGAMME	MI
2021-01-06	906-444	4XXX5XXX6XXX7XXX · 3 holders which blocks →	ONVOY, LLCV - MI	543C	ROCK	MI
2021-01-06	906-999	0XXX7XXX8XXX9XXX · 2 holders which blocks →	ONVOY, LLCV - MI	543C	IRON RIVER	MI
2020-11-03	906-263	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLCV - MI	543C	SALTSTMARI	MI
2020-06-25	906-210	2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	CSC WIRELESS, LLC	425J	MARQUETTE	MI
2018-12-11	906-257	0–9 XXXwhole prefix which blocks →	ONVOY, LLCV - MI	543C	CRYSTALFLS	MI
2018-11-27	906-936	0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	ONVOY, LLCV - MI	543C	MARQUETTE	MI
2018-11-21	906-256	0–9 XXXwhole prefix which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MI	6120	GWINN	MI
2018-06-07	906-729	0XXX1XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks →	VONAGE AMERICA LLC	197D	CALUMET	MI
2018-02-16	906-422	0–9 XXXall 10 · 4 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	MACKINACIS	MI
2018-02-08	906-767	0–9 XXXall 10 · 4 holders which blocks →	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	IRONWOOD	MI
2017-12-29	906-205	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	MARQUETTE	MI
2015-06-23	906-258	0–9 XXXwhole prefix which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	MARQUETTE	MI
2014-07-24	906-914	2XXX4XXX · 2 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MI	6120	MENOMINEE	MI
2013-10-03	906-254	0–9 XXXall 10 · 3 holders which blocks →	PENINSULA FIBER NETWORK, LLC - MI	116F	TRENARY	MI
2013-10-03	906-412	0XXX1XXX · 2 holders which blocks →	PENINSULA FIBER NETWORK, LLC - MI	116F	WHITE PINE	MI
2013-10-03	906-421	0XXX1XXX2XXX3XXX4XXX · 4 holders which blocks →	PENINSULA FIBER NETWORK, LLC - MI	116F	SKANDIA	MI
2013-10-03	906-468	0XXX which blocks →	PENINSULA FIBER NETWORK, LLC - MI	116F	SMOKYLAKES	MI
2013-10-03	906-546	0XXX which blocks →	PENINSULA FIBER NETWORK, LLC - MI	116F	SHINGLETON	MI
2013-10-03	906-559	0XXX which blocks →	PENINSULA FIBER NETWORK, LLC - MI	116F	TROUTCREEK	MI
2013-10-03	906-606	0XXX which blocks →	PENINSULA FIBER NETWORK, LLC - MI	116F	SCOTTPOINT	MI
2013-10-03	906-623	0XXX2XXX3XXX6XXX · 3 holders which blocks →	PENINSULA FIBER NETWORK, LLC - MI	116F	SAND RIVER	MI
2013-10-03	906-706	0XXX which blocks →	PENINSULA FIBER NETWORK, LLC - MI	116F	TAPIOLA	MI
2013-10-03	906-738	0XXX1XXX2XXX · 3 holders which blocks →	PENINSULA FIBER NETWORK, LLC - MI	116F	WALLACE	MI
2013-10-03	906-747	0XXX which blocks →	PENINSULA FIBER NETWORK, LLC - MI	116F	WATSON	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.