Recent prefix assignments

0 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, all time — NPA 734

MICHIGAN BELL TEL CO 161

CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 71

OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 55

MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 52

PAETEC ITEL, LLC 42

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
—	734-762	not yet reported which blocks →	MICHIGAN BELL TEL CO	9323	LIVONIA	MI
—	734-763	not yet reported which blocks →	MICHIGAN BELL TEL CO	9323	ANN ARBOR	MI
—	734-764	not yet reported which blocks →	MICHIGAN BELL TEL CO	9323	ANN ARBOR	MI
—	734-765	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	WAYNE	MI
—	734-769	not yet reported which blocks →	MICHIGAN BELL TEL CO	9323	ANN ARBOR	MI
—	734-771	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	FLAT ROCK	MI
—	734-775	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	FLAT ROCK	MI
—	734-776	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	WAYNE	MI
—	734-777	none assigned yet which blocks →	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	MONROE	MI
—	734-778	4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	FLAT ROCK	MI
—	734-779	6XXX7XXX · 2 holders which blocks →	MICHIGAN BELL TEL CO	9323	LIVONIA	MI
—	734-780	0XXX1XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	ANN ARBOR	MI
—	734-781	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 2 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	PLYMOUTH	MI
—	734-782	not yet reported which blocks →	MICHIGAN BELL TEL CO	9323	FLAT ROCK	MI
—	734-783	not yet reported which blocks →	MICHIGAN BELL TEL CO	9323	FLAT ROCK	MI
—	734-784	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI	7279	ROMULUS	MI
—	734-785	0XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MI	6120	WYANDOTTE	MI
—	734-786	not yet reported which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MI	6120	ANN ARBOR	MI
—	734-788	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	WAYNE	MI
—	734-789	0XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks →	MICHIGAN BELL TEL CO	9323	FLAT ROCK	MI
—	734-790	2XXX3XXX4XXX7XXX9XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	MONROE	MI
—	734-792	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	DEXTER	MI
—	734-793	7XXX8XXX · 2 holders which blocks →	PAETEC ITEL, LLC	829J	LIVONIA	MI
—	734-794	3XXX which blocks →	PAETEC ITEL, LLC	829J	ANN ARBOR	MI
—	734-795	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 6 holders which blocks →	PAETEC ITEL, LLC	829J	FLAT ROCK	MI
—	734-796	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks →	PAETEC ITEL, LLC	829J	BELLEVILLE	MI
—	734-797	not yet reported which blocks →	AMERICAN MESSAGING SERVICES, LLC	9748	LIVONIA	MI
—	734-798	not yet reported which blocks →	AMERICAN MESSAGING SERVICES, LLC	9748	FLAT ROCK	MI
—	734-799	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 2 holders which blocks →	PAETEC ITEL, LLC	829J	CARLETON	MI
—	734-805	8XXX9XXX · 2 holders which blocks →	MICHIGAN BELL TEL CO	9323	LIVONIA	MI
—	734-807	3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	TEMPERANCE	MI
—	734-810	not yet reported which blocks →				MI
—	734-811	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	MI
—	734-812	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	LIVONIA	MI
—	734-817	not yet reported which blocks →	AMERICAN MESSAGING SERVICES, LLC	9748	ANN ARBOR	MI
—	734-821	not yet reported which blocks →	ONVOY, LLCV - MI	543C	ANN ARBOR	MI
—	734-822	not yet reported which blocks →	ONVOY, LLCV - MI	543C	ANN ARBOR	MI
—	734-823	0XXX2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI	7279	DUNDEE	MI
—	734-826	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 2 holders which blocks →	PAETEC ITEL, LLC	829J	IDA	MI
—	734-827	4XXX9XXX · 2 holders which blocks →	MICHIGAN BELL TEL CO	9323	ANN ARBOR	MI
—	734-828	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks →	PAETEC ITEL, LLC	829J	DUNDEE	MI
—	734-829	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	YPSILANTI	MI
—	734-838	2XXX4XXX5XXX7XXX8XXX · 3 holders which blocks →	ONVOY, LLCV - MI	543C	LIVONIA	MI
—	734-839	1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 2 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI	7279	WHITMORELK	MI
—	734-843	0XXX1XXX2XXX3XXX5XXX6XXX8XXX · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MI	6120	NEW BOSTON	MI
—	734-844	4XXX which blocks →	MICHIGAN BELL TEL CO	9323	PLYMOUTH	MI
—	734-846	not yet reported which blocks →	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	ANN ARBOR	MI
—	734-847	not yet reported which blocks →	FRONTIER NORTH, INC. - MI	0695	TEMPERANCE	MI
—	734-848	0XXX1XXX7XXX · 2 holders which blocks →	FRONTIER NORTH, INC. - MI	0695	ERIE	MI
—	734-850	3XXX5XXX7XXX · 3 holders which blocks →	FRONTIER NORTH, INC. - MI	0695	TEMPERANCE	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.