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 845
VERIZON NEW YORK, INC. 159
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 73
ONVOY, LLC- NY 58
NEW CINGULAR WIRELESS PCS, LLC - DC 47
LEVEL 3 COMMUNICATIONS, LLC - NY 47
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
— 845-510 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
— 845-563 0XXX which blocks → VERIZON NEW YORK, INC. 9104 NEWBURGH NY
— 845-564 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NEWBURGH NY
— 845-565 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NEWBURGH NY
— 845-566 2XXX which blocks → VERIZON NEW YORK, INC. 9104 NEWBURGH NY
— 845-567 none assigned yet which blocks → VERIZON NEW YORK, INC. 9104 NEWBURGH NY
— 845-568 7XXX which blocks → VERIZON NEW YORK, INC. 9104 NEWBURGH NY
— 845-569 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NEWBURGH NY
— 845-571 not yet reported which blocks → AMERICAN NETWORK, INC. 8667 SPRING VLY NY
— 845-573 1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 SPRING VLY NY
— 845-574 7XXX8XXX9XXX which blocks → VERIZON NEW YORK, INC. 9104 SPRING VLY NY
— 845-575 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 POUGHKEPSI NY
— 845-577 1XXX4XXX8XXX9XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 SPRING VLY NY
— 845-578 0XXX8XXX9XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 SPRING VLY NY
— 845-579 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → VERIZON NEW YORK, INC. 9104 SPRING VLY NY
— 845-583 0XXX1XXX2XXX3XXX8XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 WHITE LAKE NY
— 845-586 6XXX7XXX8XXX · 3 holders which blocks → MARGARETVILLE TEL. CO., INC. 0104 MARGARETVL NY
— 845-600 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 MAHOPAC NY
— 845-601 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 NEWBURGH NY
— 845-603 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E LAKELAND NY
— 845-609 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K CIRCLEVL NY
— 845-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 845-615 4XXX7XXX9XXX · 3 holders which blocks → FRONTIER COMMUNICATIONS OF NEW YORK, INC. 0100 GOSHEN NY
— 845-617 0XXX1XXX2XXX3XXX6XXX7XXX8XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 CROTON FLS NY
— 845-619 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 PEARLRIVER NY
— 845-620 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 PEARLRIVER NY
— 845-621 6XXX8XXX which blocks → VERIZON NEW YORK, INC. 9104 MAHOPAC NY
— 845-622 not yet reported which blocks → ONVOY, LLC- NY 384C CROTON FLS NY

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.