NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

337 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026

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, last 30 days
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - IL 25
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 12
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
— 845-454 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 POUGHKEPSI NY
— 845-455 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 POUGHKEPSI NY
— 845-457 not yet reported which blocks → FRONTIER COMMUNICATIONS OF NEW YORK, INC. 0100 MONTGOMERY NY
— 845-462 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 POUGHKEPSI NY
— 845-463 none assigned yet which blocks → VERIZON NEW YORK, INC. 9104 POUGHKEPSI NY
— 845-465 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 POUGHKEPSI NY
— 845-466 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NUSO, LLC 732J POUGHKEPSI NY
— 845-468 not yet reported which blocks → PAETEC ITEL, LLC 829J FALLSBURG NY
— 845-469 not yet reported which blocks → FRONTIER COMMUNICATIONS OF NEW YORK, INC. 0100 CHESTER NY
— 845-471 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 POUGHKEPSI NY
— 845-472 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC- NY 384C HAVERSTRAW NY
— 845-473 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 POUGHKEPSI NY
— 845-477 1XXX5XXX6XXX7XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 GREENWD LK NY
— 845-482 0XXX1XXX2XXX6XXX7XXX8XXX · 6 holders which blocks → VERIZON NEW YORK, INC. 9104 JEFFERSNVL NY
— 845-483 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 POUGHKEPSI NY
— 845-485 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 POUGHKEPSI NY
— 845-486 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 POUGHKEPSI NY
— 845-487 not yet reported which blocks → SPOK, INC. 6630 POUGHKEPSI NY
— 845-491 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 POUGHKEPSI NY
— 845-496 not yet reported which blocks → FRONTIER COMMUNICATIONS OF NEW YORK, INC. 0100 WASHIGTNVL NY
— 845-497 6XXX which blocks → FRONTIER COMMUNICATIONS OF NEW YORK, INC. 0100 WASHIGTNVL NY
— 845-498 0XXX1XXX8XXX · 2 holders which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 WURTSBORO NY
— 845-501 4XXX5XXX7XXX9XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 NANUET NY
— 845-502 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NEW CITY NY
— 845-503 not yet reported which blocks → PAETEC ITEL, LLC 829J SPRING VLY NY
— 845-504 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 SUFFERN NY
— 845-507 0–9 XXXall 10 · 8 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 NANUET NY
— 845-510 5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 CONGERS NY
— 845-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 845-512 0XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 NYACK NY
— 845-513 0–9 XXXall 10 · 7 holders which blocks → PAETEC ITEL, LLC 829J MONTICELLO NY
— 845-515 not yet reported which blocks → PAETEC ITEL, LLC 829J HIGHLD FLS NY
— 845-516 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K RHINEBECK NY
— 845-518 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 POUGHKEPSI NY
— 845-519 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 MAHOPAC NY
— 845-524 0–9 XXXall 10 · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K PINE BUSH NY
— 845-526 1XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 LAKELAND NY
— 845-528 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 LAKELAND NY
— 845-530 not yet reported which blocks → AMERICAN NETWORK, INC. 8667 PATTERSON NY
— 845-531 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7650 CARMEL NY
— 845-532 0XXX4XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 KINGSTON NY
— 845-534 6XXX which blocks → VERIZON NEW YORK, INC. 9104 CORNWALL NY
— 845-540 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NEW CITY NY
— 845-541 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEWBURGH NY
— 845-544 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WARWICK NY
— 845-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST NY
— 845-556 not yet reported which blocks → SPOK, INC. 6630 SPRING VLY NY
— 845-557 1XXX2XXX4XXX5XXX7XXX · 4 holders which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 BARRYVILLE NY
— 845-561 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NEWBURGH NY
— 845-562 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NEWBURGH NY

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.