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 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
Clear Download CSV ↓
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 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.