NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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 724
VERIZON PENNSYLVANIA, INC. 166
TELEPORT COMMUNICATIONS AMERICA, LLC - PA 74
LEVEL 3 COMMUNICATIONS, LLC - PA 69
NEW CINGULAR WIRELESS PCS, LLC - IL 60
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 59
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
— 724-367 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 NEWKNSNGTN PA
— 724-368 1XXX2XXX4XXX5XXX6XXX7XXX · 6 holders which blocks → BRIGHTSPEED OF PENNSYLVANIA, LLC 0209 PORTERSVL PA
— 724-369 0XXX3XXX4XXX6XXX7XXX8XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 OAKDALE PA
— 724-370 0XXX1XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H PARIS PA
— 724-371 0XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 ROCHESTER PA
— 724-372 6XXX7XXX8XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 GROVE CITY PA
— 724-373 0XXX1XXX2XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7315 GREENVILLE PA
— 724-374 3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7315 JEANNETTE PA
— 724-375 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 ALIQUIPPA PA
— 724-376 5XXX6XXX · 2 holders which blocks → WINDSTREAM PENNSYLVANIA, INC. 0176 SANDY LAKE PA
— 724-377 4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → WINDSTREAM PENNSYLVANIA, INC. 0176 FREDERCKTN PA
— 724-378 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 ALIQUIPPA PA
— 724-379 0XXX3XXX · 2 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 DONORA PA
— 724-381 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7315 NEW SALEM PA
— 724-384 3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7315 BEAVER FLS PA
— 724-385 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7315 AMBRIDGE PA
— 724-386 0XXX1XXX3XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → ONVOY, LLC - PA 547E SPRINGDALE PA
— 724-387 8XXX9XXX which blocks → WINDSTREAM PENNSYLVANIA, INC. 0176 EXPORT PA
— 724-388 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 INDIANA PA
— 724-389 2XXX3XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 TARENTUM PA
— 724-390 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BADEN PA
— 724-392 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → COMCAST IP PHONE, LLC 318J HARRISONCY PA
— 724-396 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GREENSBURG PA
— 724-397 0XXX1XXX3XXX5XXX6XXX7XXX · 4 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 MARION CTR PA
— 724-399 3XXX4XXX5XXX7XXX · 4 holders which blocks → BRIGHTSPEED OF PENNSYLVANIA, LLC 0209 PARKER PA
— 724-400 0XXX1XXX2XXX3XXX4XXX5XXX6XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7315 WALEXANDER PA
— 724-401 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7315 NEWFLORNCE PA
— 724-403 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 8 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7315 INDIANA PA
— 724-404 0XXX1XXX3XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → ONVOY, LLC - PA 547E YOUNGWOOD PA
— 724-405 0XXX1XXX3XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → TERRA NOVA TELECOM INC. 145J WESTNEWTON PA
— 724-407 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ALIQUIPPA PA
— 724-408 0XXX2XXX3XXX5XXX6XXX · 4 holders which blocks → ONVOY, LLC - PA 547E GLENWILLRD PA
— 724-409 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 TARENTUM PA
— 724-410 0XXX1XXX2XXX3XXX5XXX7XXX8XXX · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SPRINGDALE PA
— 724-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX PA
— 724-413 2XXX which blocks → AERIAL COMMUNICATIONS, INC. 6701 WASHINGTON PA
— 724-414 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7315 PARIS PA
— 724-415 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 UNIONTOWN PA
— 724-416 1XXX3XXX5XXX7XXX8XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CANONSBURG PA
— 724-419 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ALIQUIPPA PA
— 724-421 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FIDIUM ENTERPRISE SERVICES, LLC 383J SLIPPERYRK PA
— 724-422 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 INDIANA PA
— 724-423 not yet reported which blocks → CITIZENS TEL. CO. OF KECKSBURG 0156 MAMMOTH PA
— 724-424 not yet reported which blocks → CITIZENS TEL. CO. OF KECKSBURG 0156 MAMMOTH PA
— 724-425 0XXX4XXX5XXX6XXX · 3 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 UNIONTOWN PA
— 724-426 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7315 BROWNSVL PA
— 724-428 2XXX6XXX7XXX · 3 holders which blocks → WINDSTREAM PENNSYLVANIA, INC. 0176 GRAYSVILLE PA
— 724-429 0XXX1XXX2XXX3XXX4XXX5XXX8XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7315 BURGETTSTN PA
— 724-430 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 UNIONTOWN PA
— 724-431 5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FIDIUM ENTERPRISE SERVICES, LLC 383J BUTLER PA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.