Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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
—	734-852	not yet reported which blocks →	AMERICAN MESSAGING SERVICES, LLC	9748	LIVONIA	MI
—	734-853	0XXX7XXX9XXX which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	LIVONIA	MI
—	734-854	0XXX which blocks →	FRONTIER MIDSTATES, INC. - MI	0681	LAMBERTVL	MI
—	734-855	0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	LIVONIA	MI
—	734-856	0XXX9XXX · 2 holders which blocks →	FRONTIER MIDSTATES, INC. - MI	0681	LAMBERTVL	MI
—	734-857	0XXX3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	ROMULUS	MI
—	734-858	0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	WAYNE	MI
—	734-860	not yet reported which blocks →	AMERICAN MESSAGING SERVICES, LLC	9748	YPSILANTI	MI
—	734-862	0XXX2XXX3XXX4XXX5XXX6XXX9XXX · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MI	6120	PLYMOUTH	MI
—	734-864	2XXX3XXX6XXX · 2 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MI	6120	ANN ARBOR	MI
—	734-865	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks →	ONVOY, LLCV - MI	543C	BELLEVILLE	MI
—	734-866	0XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	IDA	MI
—	734-869	0XXX2XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI	7279	CARLETON	MI
—	734-872	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks →	CHARTER IP ENABLED SERVICES, LLC	792K	NEWPORT	MI
—	734-875	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	LOSTPNNSUL	MI
—	734-876	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	MAYBEE	MI
—	734-878	8XXX which blocks →	MICHIGAN BELL TEL CO	9323	PINCKNEY	MI
—	734-879	0XXX1XXX2XXX3XXX8XXX · 4 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	YPSILANTI	MI
—	734-887	1XXX6XXX9XXX · 2 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	ANN ARBOR	MI
—	734-888	2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	FRONTIER NORTH, INC. - OH	0615	NOSYLVANIA	MI
—	734-890	0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	WAYNE	MI
—	734-893	2XXX4XXX5XXX7XXX8XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	ROMULUS	MI
—	734-895	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	COMCAST IP PHONE, LLC	318J	WAYNE	MI
—	734-900	not yet reported which blocks →				MI
—	734-902	not yet reported which blocks →	TELNET WORLDWIDE, INC.	817J	WAYNE	MI
—	734-904	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	ANN ARBOR	MI
—	734-905	5XXX7XXX8XXX · 3 holders which blocks →	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	YPSILANTI	MI
—	734-906	not yet reported which blocks →				MI
—	734-907	not yet reported which blocks →	SPOK, INC.	6630	TRENTON	MI
—	734-911	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	MI
—	734-913	3XXX which blocks →	MICHIGAN BELL TEL CO	9323	ANN ARBOR	MI
—	734-917	4XXX5XXX7XXX8XXX9XXX which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI	7279	ERIE	MI
—	734-922	2XXX5XXX8XXX · 2 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI	7279	ANN ARBOR	MI
—	734-925	4XXX5XXX7XXX8XXX which blocks →	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	FLAT ROCK	MI
—	734-926	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - MI	991E	ANN ARBOR	MI
—	734-927	2XXX4XXX5XXX7XXX8XXX · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - MI	991E	PLYMOUTH	MI
—	734-928	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI	7279	PLYMOUTH	MI
—	734-929	2XXX4XXX5XXX7XXX8XXX · 3 holders which blocks →	COMCAST IP PHONE, LLC	318J	ANN ARBOR	MI
—	734-930	not yet reported which blocks →	MICHIGAN BELL TEL CO	9323	ANN ARBOR	MI
—	734-931	0XXX1XXX2XXX3XXX5XXX6XXX8XXX · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - MI	991E	FLAT ROCK	MI
—	734-936	not yet reported which blocks →	MICHIGAN BELL TEL CO	9323	ANN ARBOR	MI
—	734-939	7XXX which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI	7279	ROMULUS	MI
—	734-941	not yet reported which blocks →	MICHIGAN BELL TEL CO	9323	ROMULUS	MI
—	734-942	not yet reported which blocks →	MICHIGAN BELL TEL CO	9323	ROMULUS	MI
—	734-944	not yet reported which blocks →	FRONTIER NORTH, INC. - MI	0695	SALINE	MI
—	734-945	none assigned yet which blocks →	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	ANN ARBOR	MI
—	734-946	not yet reported which blocks →	MICHIGAN BELL TEL CO	9323	ROMULUS	MI
—	734-947	0XXX which blocks →	MICHIGAN BELL TEL CO	9323	ROMULUS	MI
—	734-950	not yet reported which blocks →				MI
—	734-953	not yet reported which blocks →	MICHIGAN BELL TEL CO	9323	LIVONIA	MI

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.