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 540
VERIZON VIRGINIA, INC. 156
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 79
NEW CINGULAR WIRELESS PCS, LLC - DC 66
OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 64
LEVEL 3 COMMUNICATIONS, LLC - VA 50
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
2009-05-07 540-441 0–9 XXXall 10 · 7 holders which blocks → PAETEC ITEL, LLC 829J MT GILEAD VA
2009-05-04 540-321 0–9 XXXall 10 · 8 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 CULPEPER VA
2009-03-24 540-285 1XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 BALLARD VA
2009-03-20 540-218 0–9 XXXall 10 · 5 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 SHENANDOAH VA
2009-03-20 540-395 0–9 XXXall 10 · 4 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 ORANGE VA
2009-03-12 540-621 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 FREDECKSBG VA
2009-02-26 540-940 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 FREDECKSBG VA
2008-12-17 540-277 0–9 XXXall 10 · 10 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BERRYVILLE VA
2008-12-17 540-326 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MIDDLEBURG VA
2008-12-17 540-402 0–9 XXXall 10 · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 REMINGTON VA
2008-12-03 540-235 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PEARISBURG VA
2008-12-01 540-329 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 GLASGOW VA
2008-10-23 540-625 0–9 XXXall 10 · 8 holders which blocks → IDT AMERICA, CORP. - VA 231C KINGGEORGE VA
2008-10-20 540-565 0–9 XXXall 10 · 4 holders which blocks → SHENTEL COMMUNICATIONS, LLC. - VA 4979 UNION HALL VA
2008-10-20 540-909 1XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → SHENTEL COMMUNICATIONS, LLC. - VA 4979 BOONESMILL VA
2008-08-29 540-628 0–9 XXXall 10 · 8 holders which blocks → COMCAST IP PHONE, LLC 318J STAFFORD VA
2008-08-29 540-705 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F HARRISONBG VA
2008-08-04 540-693 0–9 XXXall 10 · 6 holders which blocks → VERIZON VIRGINIA, INC. 9213 FREDECKSBG VA
2008-07-31 540-445 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F CULPEPER VA
2008-06-17 540-650 0–9 XXXwhole prefix which blocks → YMAX COMMUNICATIONS CORP. OF VIRGINIA - VA 367E ROANOKE VA
2008-05-28 540-632 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F ROANOKE VA
2008-05-13 540-656 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 FREDECKSBG VA
2008-04-15 540-498 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 FREDECKSBG VA
2008-02-25 540-629 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 RADFORD VA
2008-02-11 540-688 0–9 XXXall 10 · 6 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 STAUNTON VA
2007-10-23 540-733 2XXX3XXX4XXX6XXX7XXX8XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - VA 7238 EDOM VA
2007-10-22 540-692 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 FRONTROYAL VA
2007-09-13 540-404 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J SALEM VA
2007-09-06 540-695 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → UNITED STATES CELLULAR - VA 6283 FLOYD VA
2007-06-14 540-359 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WARRENTON VA
2007-01-10 540-419 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 FREDECKSBG VA
2006-11-20 540-412 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 CHANCELLOR VA
2006-08-22 540-316 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 WARRENTON VA
2006-06-21 540-597 0–9 XXXall 10 · 2 holders which blocks → PAETEC ITEL, LLC 829J ROANOKE VA
2006-04-06 540-301 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 ROANOKE VA
2006-04-05 540-317 0–9 XXXall 10 · 6 holders which blocks → PAETEC ITEL, LLC 829J CULPEPER VA
2006-03-24 540-318 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J STAFFORD VA
2006-01-05 540-645 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 FREDECKSBG VA
2005-12-28 540-679 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 HOTSPRINGS VA
2005-07-20 540-313 0–9 XXXall 10 · 6 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WINCHESTER VA
2005-03-28 540-308 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 ORANGE VA
2005-03-17 540-604 0–9 XXXall 10 · 2 holders which blocks → PAETEC ITEL, LLC 829J FREDECKSBG VA
2005-03-09 540-451 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WAYNESBORO VA
2004-12-13 540-244 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 LURAY VA
2004-11-19 540-507 0–9 XXXall 10 · 8 holders which blocks → VERIZON VIRGINIA, INC. 9213 SPOTSYLVAN VA
2004-10-04 540-209 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - VA 7238 HARRISONBG VA
2004-09-20 540-322 0–9 XXXall 10 · 6 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 FREDECKSBG VA
2004-08-24 540-205 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 MINERAL VA
2004-07-29 540-204 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ROANOKE VA
2004-06-09 540-237 0XXX1XXX2XXX3XXX4XXX6XXX7XXX · 6 holders which blocks → COMCAST IP PHONE, LLC 318J BRIDGEWTR VA

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.