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
Clear Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2004-05-03 540-221 0–9 XXXall 10 · 4 holders which blocks → LUMOS TELEPHONE LLC 0226 WAYNESBORO VA
2004-04-07 540-278 0–9 XXXall 10 · 2 holders which blocks → PAETEC ITEL, LLC 829J ROANOKE VA
2004-03-01 540-307 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 DUBLIN VA
2003-09-18 540-415 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WAYNESBORO VA
2003-09-09 540-233 6XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WOODSTOCK VA
2003-08-07 540-383 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 HARRISONBG VA
2003-07-25 540-623 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 FREDECKSBG VA
2003-07-25 540-624 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 EDINBURG VA
2003-07-16 540-469 0–9 XXXall 10 · 8 holders which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 DAHLGREN VA
2003-05-20 540-466 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 STAUNTON VA
2003-05-20 540-467 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ROANOKE VA
2003-03-26 540-579 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 CATOCTIN VA
2002-10-21 540-236 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 HARRISONBG VA
2002-10-17 540-352 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 ROCKYMOUNT VA
2002-10-03 540-346 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 FERRUM VA
2002-09-26 540-223 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 LOUISA VA
2002-09-19 540-238 0XXX2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ROCKYMOUNT VA
2002-09-17 540-429 7XXX which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 FREDECKSBG VA
2002-08-30 540-481 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → METROPCS, INC. 5562 EDINBURG VA
2002-08-07 540-227 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WASHINGTON VA
2002-08-07 540-228 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 NATURALBDG VA
2002-06-25 540-257 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 CHRISTISBG VA
2002-06-25 540-263 0XXX1XXX2XXX3XXX8XXX · 3 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ROCKYMOUNT VA
2002-06-25 540-416 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 STAUNTON VA
2002-06-20 540-425 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BEDFORD VA
2002-05-23 540-912 0–9 XXXall 10 · 8 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 BURNTCHMNY VA
2002-05-09 540-904 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 ROANOKE VA
2002-05-09 540-905 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WARRENTON VA
2002-05-09 540-907 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 FREDECKSBG VA
2002-05-09 540-908 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 HARRISONBG VA
2002-04-16 540-424 4XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 FREDECKSBG VA
2002-03-19 540-284 not yet reported which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 DAHLGREN VA
2002-03-19 540-709 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 KINGGEORGE VA
2002-03-18 540-812 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → COMCAST IP PHONE, LLC 318J CULPEPER VA
2002-03-15 540-903 7XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 FREDECKSBG VA
2002-02-22 540-830 6XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 HARRISONBG VA
2002-02-22 540-910 4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WAYNESBORO VA
2002-01-21 540-815 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROANOKE VA
2001-12-21 540-305 0XXX1XXX2XXX3XXX4XXX5XXX8XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 FRONTROYAL VA
2001-12-21 540-518 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 DUBLIN VA
2001-12-21 540-609 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 STAUNTON VA
2001-12-21 540-713 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 ELKTON VA
2001-12-20 540-514 1XXX2XXX3XXX4XXX5XXX7XXX8XXX which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WINCHESTER VA
2001-12-20 540-820 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 HARRISONBG VA
2001-12-20 540-860 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 LURAY VA
2001-11-19 540-440 1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 7 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 PULASKI VA
2001-11-19 540-754 not yet reported which blocks → COMCAST IP PHONE, LLC 318J WINCHESTER VA
2001-11-19 540-998 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CHRISTISBG VA
2001-10-16 540-810 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 HARRISONBG VA
2001-09-20 540-303 4XXX5XXX6XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WINCHESTER 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.