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
2002-05-23 810-746 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 HARTLAND MI
2002-05-23 810-788 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 YALE MI
2002-05-20 810-643 0–9 XXXall 10 · 7 holders which blocks → PAETEC ITEL, LLC 829J MARINECITY MI
2002-04-23 810-420 0XXX1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 8 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 MARINECITY MI
2002-04-23 810-531 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 PORT HURON MI
2002-04-23 810-625 2XXX3XXX4XXX which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 FLINT MI
2002-04-12 810-600 not yet reported which blocks → PAETEC ITEL, LLC 829J FLINT MI
2002-03-28 810-734 5XXX6XXX7XXX8XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ALGONAC MI
2002-03-27 810-400 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J MARINECITY MI
2002-03-27 810-616 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J FENTON MI
2002-03-27 810-800 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J HARTLAND MI
2002-03-27 810-828 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J DAVISON MI
2002-03-27 810-900 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J BRIGHTON MI
2002-03-18 810-881 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 PECK MI
2002-02-20 810-515 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 FLINT MI
2002-01-16 810-425 1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E PT SANILAC MI
2002-01-16 810-535 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → ACD TELECOM, INC. - MI 3535 MEMPHIS MI
2002-01-16 810-618 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 FLINT MI
2002-01-16 810-857 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J ALGONAC MI
2001-12-28 810-357 0XXX2XXX3XXX4XXX5XXX6XXX · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 PORT HURON MI
2001-12-28 810-375 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → 123.NET, LLC 2550 DRYDEN MI
2001-12-28 810-442 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → 123.NET, LLC 2550 DECKERVL MI
2001-12-28 810-969 0–9 XXXall 10 · 7 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 LAPEER MI
2001-11-27 810-366 1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DECKERVL MI
2001-11-27 810-537 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 7 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 SANDUSKY MI
2001-10-18 810-512 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → 123.NET, LLC 2550 ALGONAC MI
2001-10-18 810-623 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 BRIGHTON MI
2001-10-18 810-669 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E CAPAC MI
2001-10-18 810-886 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 BROWN CITY MI
2001-09-21 810-449 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 FLINT MI
2001-09-21 810-539 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J DECKERVL MI
2001-09-21 810-740 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 ST CLAIR MI
2001-08-17 810-358 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 LAPEER MI
2001-07-17 810-729 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J CAPAC MI
2001-07-17 810-874 2XXX3XXX4XXX5XXX7XXX8XXX · 2 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 FLINT MI
2001-07-17 810-877 6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FLINT MI
2001-05-16 810-701 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 FLINT MI
2001-05-16 810-937 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 7279 PORT HURON MI
2001-04-20 810-483 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J YALE MI
2001-03-16 810-448 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J DRYDEN MI
2001-03-16 810-488 4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PORT HURON MI
2001-03-07 810-624 6XXX7XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FLINT MI
2001-02-15 810-452 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J LAPEER MI
2001-01-23 810-300 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 PORT HURON MI
2001-01-15 810-210 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 FLINT MI
2001-01-15 810-887 0–9 XXXall 10 · 2 holders which blocks → MICHIGAN BELL TEL CO 9323 PORT HURON MI
2001-01-15 810-908 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FLINT MI
— 810-203 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 APPLEGATE MI
— 810-205 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 PORT HURON MI
— 810-209 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J BYRON 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.