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 570
VERIZON PENNSYLVANIA, INC. 156
COMMONWEALTH TELEPHONE COMPANY LLC 75
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 75
NEW CINGULAR WIRELESS PCS, LLC - DC 68
CORE COMMUNICATIONS, INC. - PA 62
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
— 570-471 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 MOOSIC PA
— 570-472 1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 WILKSBARRE PA
— 570-473 5XXX6XXX · 2 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 NORTHUBRLD PA
— 570-474 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 MOUNTANTOP PA
— 570-475 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 MOUNTANTOP PA
— 570-476 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 STROUDSBG PA
— 570-477 6XXX7XXX8XXX which blocks → COMMONWEALTH TELEPHONE COMPANY LLC 0161 SWEET VLY PA
— 570-478 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → VERIZON NORTH, INC. - PA (QUAKER ST) 0201 LOYALSOCK PA
— 570-479 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PITTSTON PA
— 570-480 not yet reported which blocks → SPOK, INC. 6630 MOOSIC PA
— 570-481 0–9 XXXall 10 · 10 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 CRESCO PA
— 570-482 1XXX5XXX6XXX · 3 holders which blocks → COMMONWEALTH TELEPHONE COMPANY LLC 0161 MUNCY VLY PA
— 570-483 0XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 OLYPHANT PA
— 570-487 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 OLYPHANT PA
— 570-488 not yet reported which blocks → SOUTH CANAAN TEL. CO. 0204 WAYMART PA
— 570-489 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 OLYPHANT PA
— 570-490 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 NORTHUBRLD PA
— 570-491 0XXX1XXX3XXX6XXX7XXX8XXX · 5 holders which blocks → VERIZON NORTH, INC. - PA (QUAKER ST) 0201 MATAMORAS PA
— 570-493 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 HONESDALE PA
— 570-494 3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 WILLIAMSPT PA
— 570-495 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 SUNBURY PA
— 570-496 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 SCRANTON PA
— 570-498 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PITTSTON PA
— 570-501 not yet reported which blocks → CTSI, INC. - PA 7513 HAZLETON PA
— 570-503 4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J HAMLIN PA
— 570-504 4XXX6XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SCRANTON PA
— 570-506 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WILLIAMSPT PA
— 570-509 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 SHAMOKIN PA
— 570-510 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PITTSTON PA
— 570-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX PA
— 570-512 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - PA 547E TROY PA
— 570-513 3XXX4XXX · 2 holders which blocks → COMMONWEALTH TELEPHONE COMPANY LLC 0161 MANSFIELD PA
— 570-517 1XXX4XXX6XXX8XXX9XXX · 2 holders which blocks → CTSI, INC. - PA 7513 STROUDSBG PA
— 570-520 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F BERWICK PA
— 570-521 1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 JERMYN PA
— 570-522 not yet reported which blocks → WINDSTREAM BUFFALO VALLEY, INC. 0151 LEWISBURG PA
— 570-523 not yet reported which blocks → WINDSTREAM BUFFALO VALLEY, INC. 0151 LEWISBURG PA
— 570-524 not yet reported which blocks → WINDSTREAM BUFFALO VALLEY, INC. 0151 LEWISBURG PA
— 570-525 1XXX2XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → COMMONWEALTH TELEPHONE COMPANY LLC 0161 EAGLESMERE PA
— 570-531 0–9 XXXall 10 · 8 holders which blocks → ONVOY, LLC - PA 547E RENOVO PA
— 570-537 0XXX which blocks → NORTH PENN TEL. CO. 0192 MILLERTON PA
— 570-538 8XXX which blocks → WINDSTREAM PENNSYLVANIA, INC. 0176 WATSONTOWN PA
— 570-539 1XXX5XXX7XXX9XXX · 3 holders which blocks → VERIZON NORTH, INC. - PA (CONTEL) 0170 MTPLSANTML PA
— 570-542 not yet reported which blocks → COMMONWEALTH TELEPHONE COMPANY LLC 0161 SHICKSHINY PA
— 570-543 1XXX2XXX3XXX5XXX6XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 TAYLOR PA
— 570-544 0XXX which blocks → VERIZON PENNSYLVANIA, INC. 9208 MINERSVL PA
— 570-545 4XXX6XXX7XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 MANSFIELD PA
— 570-546 not yet reported which blocks → WINDSTREAM PENNSYLVANIA, INC. 0176 MUNCY PA
— 570-547 4XXX which blocks → WINDSTREAM PENNSYLVANIA, INC. 0176 MONTGOMERY PA
— 570-549 0XXX which blocks → NORTH PENN TEL. CO. 0192 ROSEVILLE PA

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.