NumberResearch Membership · Data 09/19/2026

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 248
MICHIGAN BELL TEL CO 251
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 72
NEW CINGULAR WIRELESS PCS, LLC - IL 66
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 62
LEVEL 3 COMMUNICATIONS, LLC - MI 58
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
2008-02-14 248-251 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 TROY MI
2008-02-07 248-238 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 CLARKSTON MI
2008-02-07 248-805 0–9 XXXall 10 · 4 holders which blocks → FIRST COMMUNICATIONS, LLC 460K ROCHESTER MI
2007-09-04 248-859 0–9 XXXall 10 · 7 holders which blocks → BHN IP ENABLED SERVICES, LLC 045L WALLEDLAKE MI
2007-08-23 248-574 0–9 XXXall 10 · 4 holders which blocks → CLEAR RATE COMMUNICATIONS, LLC 046L WALLEDLAKE MI
2007-07-17 248-439 0–9 XXXwhole prefix which blocks → WOW! INTERNET, CABLE AND PHONE 961J ROYAL OAK MI
2006-05-23 248-469 0–9 XXXall 10 · 4 holders which blocks → CYNERGYCOMM.NET, INC. - MI 9245 SOUTHFIELD MI
2006-05-01 248-595 0–9 XXXall 10 · 5 holders which blocks → GRID 4 COMMUNICATIONS, INC. - MI 9714 SOUTHFIELD MI
2006-02-28 248-850 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROYAL OAK MI
2006-02-01 248-499 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 PONTIAC MI
2005-11-16 248-599 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E DRAYTON PL MI
2005-09-22 248-714 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 7279 MILFDWH LK MI
2005-07-14 248-707 0–9 XXXall 10 · 7 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 CLARKSTON MI
2005-07-06 248-793 0–9 XXXall 10 · 6 holders which blocks → 123.NET, LLC 2550 ORTONVILLE MI
2005-06-02 248-313 0–9 XXXall 10 · 8 holders which blocks → PAETEC ITEL, LLC 829J WALLEDLAKE MI
2005-05-31 248-773 0–9 XXXall 10 · 7 holders which blocks → PAETEC ITEL, LLC 829J NORTHVILLE MI
2005-03-14 248-556 0–9 XXXall 10 · 8 holders which blocks → PAETEC ITEL, LLC 829J ROYAL OAK MI
2004-10-18 248-605 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 CLARKSTON MI
2004-07-21 248-995 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 ROYAL OAK MI
2004-07-09 248-794 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLCV - MI 543C SOUTHFIELD MI
2003-10-01 248-200 0–9 XXXall 10 · 6 holders which blocks → PAETEC ITEL, LLC 829J SOUTHFIELD MI
2002-09-17 248-860 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 PONTIAC MI
2002-09-17 248-953 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 TROY MI
2002-05-23 248-930 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 TROY MI
2002-05-08 248-731 1XXX7XXX8XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 BIRMINGHAM MI
2002-05-08 248-835 0XXX1XXX2XXX3XXX · 2 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 TROY MI
2002-04-02 248-493 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J SOUTH LYON MI
2002-04-02 248-899 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J ORTONVILLE MI
2002-04-02 248-913 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J CLARKSTON MI
2002-03-12 248-856 5XXX8XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 7279 AUBURN HTS MI
2002-03-12 248-880 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 NORTHVILLE MI
2002-03-12 248-974 0XXX1XXX2XXX3XXX4XXX · 2 holders which blocks → METROPCS, INC. 5562 NORTHVILLE MI
2002-03-12 248-990 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROYAL OAK MI
2001-12-28 248-302 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 SOUTHFIELD MI
2001-12-28 248-497 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → METROPCS, INC. 5562 SOUTHFIELD MI
2001-12-28 248-606 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → MICHIGAN BELL TEL CO 9323 AUBURN HTS MI
2001-12-28 248-929 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 LAKE ORION MI
2001-11-01 248-943 none assigned yet which blocks → METROPCS, INC. 5562 SOUTHFIELD MI
2001-10-01 248-724 6XXX8XXX which blocks → 123.NET, LLC 2550 PONTIAC MI
2001-10-01 248-739 3XXX4XXX5XXX7XXX8XXX which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 W BLOOMFLD MI
2001-10-01 248-807 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 HOLLY MI
2001-10-01 248-918 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 TROY MI
2001-08-27 248-756 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 NORTHVILLE MI
2001-08-27 248-864 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 SOUTHFIELD MI
2001-08-27 248-979 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → METROPCS, INC. 5562 BIRMINGHAM MI
2001-07-27 248-885 5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRMINGHAM MI
2001-06-28 248-808 6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROYAL OAK MI
2001-06-28 248-904 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 PONTIAC MI
2001-06-28 248-941 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → WOW! INTERNET, CABLE AND PHONE 961J ROCHESTER MI
2001-05-24 248-758 4XXX6XXX8XXX · 3 holders which blocks → MICHIGAN BELL TEL CO 9323 PONTIAC 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.