NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

2 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, last 30 days — NPA 810
NEW CINGULAR WIRELESS PCS, LLC - IL 2
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
— 810-768 1XXX3XXX8XXX · 3 holders which blocks → MICHIGAN BELL TEL CO 9323 FLINT MI
— 810-780 4XXX which blocks → MICHIGAN BELL TEL CO 9323 FLINT MI
— 810-785 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 FLINT MI
— 810-787 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 FLINT MI
— 810-789 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 FLINT MI
— 810-793 3XXX9XXX · 2 holders which blocks → FRONTIER NORTH, INC. - MI 0695 COLUMBIAVL MI
— 810-794 6XXX which blocks → MICHIGAN BELL TEL CO 9323 ALGONAC MI
— 810-796 0XXX1XXX5XXX6XXX8XXX · 4 holders which blocks → FRONTIER NORTH, INC. - MI 0695 DRYDEN MI
— 810-797 1XXX7XXX8XXX9XXX · 4 holders which blocks → BRIGHTSPEED OF CENTRAL MICHIGAN, INC 0671 HADLEY MI
— 810-798 1XXX4XXX · 2 holders which blocks → FRONTIER NORTH, INC. - MI 0695 ALMONT MI
— 810-809 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 XXXXXXXXXX MI
— 810-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX MI
— 810-812 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 FLINT MI
— 810-813 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FLINT MI
— 810-814 not yet reported which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 FLINT MI
— 810-815 9XXX which blocks → ONVOY, LLCV - MI 543C LEXINGTON MI
— 810-820 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FLINT MI
— 810-821 not yet reported which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 7279 ALGONAC MI
— 810-824 0–9 XXXall 10 · 3 holders which blocks → PAETEC ITEL, LLC 829J PORT HURON MI
— 810-827 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 5 holders which blocks → 123.NET, LLC 2550 EMMETT MI
— 810-830 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 BRIGHTON MI
— 810-833 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 FLINT MI
— 810-835 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → MICHIGAN BELL TEL CO 9323 FLINT MI
— 810-836 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 FLINT MI
— 810-837 1XXX2XXX3XXX4XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SANDUSKY MI
— 810-841 7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PORT HURON MI
— 810-842 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E IMLAY CITY MI
— 810-844 1XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → MICHIGAN BELL TEL CO 9323 BRIGHTON MI
— 810-845 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 FLINT MI
— 810-852 0XXX1XXX2XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 7279 BRIGHTON MI
— 810-853 3XXX4XXX5XXX6XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FLINT MI
— 810-858 0XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → METROPCS, INC. 5562 PORT HURON MI
— 810-866 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E GRANDBLANC MI
— 810-867 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 8 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E FLUSHING MI
— 810-869 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 FLINT MI
— 810-875 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FLINT MI
— 810-878 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → MICHIGAN BELL TEL CO 9323 CROSWELL MI
— 810-882 0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 7279 LAPEER MI
— 810-885 3XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 7279 FENTON MI
— 810-891 0XXX1XXX3XXX5XXX6XXX9XXX · 3 holders which blocks → ONVOY, LLCV - MI 543C SANDUSKY MI
— 810-892 0XXX1XXX2XXX3XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 MARINECITY MI
— 810-895 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 LAPEER MI
— 810-901 0XXX5XXX which blocks → 123.NET, LLC 2550 SANDUSKY MI
— 810-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX MI
— 810-919 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FLINT MI
— 810-922 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 FLINT MI
— 810-923 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 BRIGHTON MI
— 810-931 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 FLINT MI
— 810-936 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E FENTON MI
— 810-938 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FLINT 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.