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
— 540-925 not yet reported which blocks → MGW TELEPHONE COMPANY, INC. 0238 WILLIAMSVL VA
— 540-929 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → VERIZON VIRGINIA, INC. 9213 BENT MT VA
— 540-931 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WINCHESTER VA
— 540-932 not yet reported which blocks → LUMOS TELEPHONE LLC 0226 WAYNESBORO VA
— 540-933 not yet reported which blocks → SHENANDOAH TEL. CO. 0250 FORT VLY VA
— 540-937 0XXX1XXX8XXX · 3 holders which blocks → VERIZON VIRGINIA, INC. 9213 CULPEPER VA
— 540-939 not yet reported which blocks → MGW TELEPHONE COMPANY, INC. 0238 DEERFIELD VA
— 540-941 not yet reported which blocks → LUMOS TELEPHONE LLC 0226 WAYNESBORO VA
— 540-942 not yet reported which blocks → LUMOS TELEPHONE LLC 0226 WAYNESBORO VA
— 540-943 not yet reported which blocks → LUMOS TELEPHONE LLC 0226 WAYNESBORO VA
— 540-946 not yet reported which blocks → LUMOS TELEPHONE LLC 0226 WAYNESBORO VA
— 540-947 0XXX1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → VERIZON VIRGINIA, INC. 9213 MONTVALE VA
— 540-948 0XXX1XXX2XXX8XXX · 3 holders which blocks → VERIZON VIRGINIA, INC. 9213 MADISON VA
— 540-949 not yet reported which blocks → LUMOS TELEPHONE LLC 0226 WAYNESBORO VA
— 540-950 not yet reported which blocks → VA
— 540-951 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 BLACKSBURG VA
— 540-953 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 BLACKSBURG VA
— 540-954 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 ROANOKE VA
— 540-955 7XXX8XXX · 2 holders which blocks → VERIZON VIRGINIA, INC. 9213 BERRYVILLE VA
— 540-958 1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 COVINGTON VA
— 540-959 not yet reported which blocks → VA
— 540-960 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 COVINGTON VA
— 540-961 6XXX which blocks → VERIZON VIRGINIA, INC. 9213 BLACKSBURG VA
— 540-962 not yet reported which blocks → LUMOS TELEPHONE LLC 0226 COVINGTON VA
— 540-965 not yet reported which blocks → LUMOS TELEPHONE LLC 0226 COVINGTON VA
— 540-966 7XXX which blocks → LUMOS TELEPHONE OF BOTETOURT LLC 0249 TROUTVILLE VA
— 540-967 6XXX7XXX8XXX · 3 holders which blocks → VERIZON VIRGINIA, INC. 9213 LOUISA VA
— 540-968 4XXX5XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 COVINGTON VA
— 540-969 none assigned yet which blocks → LUMOS TELEPHONE LLC 0226 COVINGTON VA
— 540-972 not yet reported which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 CHANCELLOR VA
— 540-973 0XXX1XXX2XXX3XXX4XXX5XXX · 2 holders which blocks → TELNYX LLC 073H THE PLAINS VA
— 540-975 none assigned yet which blocks → METROPCS, INC. 5562 EDINBURG VA
— 540-976 not yet reported which blocks → VA
— 540-977 7XXX8XXX · 2 holders which blocks → VERIZON VIRGINIA, INC. 9213 ROANOKE VA
— 540-980 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 PULASKI VA
— 540-981 4XXX5XXX · 2 holders which blocks → VERIZON VIRGINIA, INC. 9213 ROANOKE VA
— 540-982 none assigned yet which blocks → VERIZON VIRGINIA, INC. 9213 ROANOKE VA
— 540-983 2XXX5XXX which blocks → VERIZON VIRGINIA, INC. 9213 ROANOKE VA
— 540-984 not yet reported which blocks → SHENANDOAH TEL. CO. 0250 EDINBURG VA
— 540-985 1XXX7XXX which blocks → VERIZON VIRGINIA, INC. 9213 ROANOKE VA
— 540-986 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON VIRGINIA, INC. 9213 ROANOKE VA
— 540-987 0XXX1XXX2XXX4XXX5XXX6XXX7XXX · 6 holders which blocks → VERIZON VIRGINIA, INC. 9213 SPERRYVL VA
— 540-989 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 ROANOKE VA
— 540-990 1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → TWILIO INTERNATIONAL, INC. 506J DAHLGREN VA
— 540-992 0XXX which blocks → LUMOS TELEPHONE OF BOTETOURT LLC 0249 TROUTVILLE VA
— 540-993 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 FREDECKSBG VA
— 540-994 4XXX6XXX7XXX · 3 holders which blocks → VERIZON VIRGINIA, INC. 9213 PULASKI VA
— 540-996 not yet reported which blocks → MGW TELEPHONE COMPANY, INC. 0238 MCCLUNG VA
— 540-997 1XXX2XXX3XXX4XXX6XXX8XXX · 5 holders which blocks → VERIZON VIRGINIA, INC. 9213 CRAIGSVL VA
— 540-999 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON VIRGINIA, INC. 9213 SHENANDHPK 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.