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
— 845-358 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NYACK NY
— 845-359 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 PIERMONT NY
— 845-361 6XXX7XXX8XXX · 3 holders which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 CIRCLEVL NY
— 845-362 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SPRING VLY NY
— 845-363 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 BREWSTER NY
— 845-364 1XXX4XXX6XXX7XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 SPRING VLY NY
— 845-365 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 PIERMONT NY
— 845-367 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 NANUET NY
— 845-368 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SUFFERN NY
— 845-369 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SUFFERN NY
— 845-371 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SPRING VLY NY
— 845-372 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 POUGHKEPSI NY
— 845-373 0XXX1XXX2XXX3XXX5XXX6XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 AMENIA NY
— 845-374 0XXX which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 DENTON NY
— 845-375 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC- NY 384C NEWBURGH NY
— 845-381 0–9 XXXall 10 · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K MIDDLETOWN NY
— 845-382 0XXX3XXX4XXX8XXX9XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 KINGSTON NY
— 845-383 0XXX1XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 KINGSTON NY
— 845-384 0XXX1XXX2XXX3XXX7XXX9XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 ESOPUS NY
— 845-386 0XXX7XXX · 2 holders which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 OTISVILLE NY
— 845-387 not yet reported which blocks → SPOK, INC. 6630 POUGHKEPSI NY
— 845-398 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 PIERMONT NY
— 845-400 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC- NY 384C SPRING VLY NY
— 845-401 none assigned yet which blocks → METROPCS, INC. 5562 NEWBURGH NY
— 845-402 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → RCN TELECOM SERVICES, INC. - NY 7353 PEEKSKILL NY
— 845-406 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 SPRING VLY NY
— 845-408 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 MIDDLETOWN NY
— 845-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 845-416 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 POUGHKEPSI NY
— 845-417 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 KINGSTON NY
— 845-424 0XXX1XXX5XXX6XXX7XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 GARRISON NY
— 845-425 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SPRING VLY NY
— 845-426 8XXX9XXX which blocks → VERIZON NEW YORK, INC. 9104 SPRING VLY NY
— 845-427 1XXX which blocks → FRONTIER COMMUNICATIONS OF NEW YORK, INC. 0100 MAYBROOK NY
— 845-429 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 HAVERSTRAW NY
— 845-430 none assigned yet which blocks → METROPCS, INC. 5562 KINGSTON NY
— 845-431 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 POUGHKEPSI NY
— 845-432 4XXX5XXX which blocks → VERIZON NEW YORK, INC. 9104 POUGHKEPSI NY
— 845-433 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 POUGHKEPSI NY
— 845-434 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 FALLSBURG NY
— 845-435 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 POUGHKEPSI NY
— 845-436 0XXX3XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 FALLSBURG NY
— 845-437 1XXX8XXX which blocks → VERIZON NEW YORK, INC. 9104 POUGHKEPSI NY
— 845-438 not yet reported which blocks → SPOK, INC. 6630 NEWBURGH NY
— 845-439 0XXX1XXX2XXX6XXX7XXX9XXX · 6 holders which blocks → VERIZON NEW YORK, INC. 9104 LIVISTNMNR NY
— 845-440 1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 BEACON NY
— 845-446 8XXX which blocks → VERIZON NEW YORK, INC. 9104 HIGHLD FLS NY
— 845-449 not yet reported which blocks → SPOK, INC. 6630 POUGHKEPSI NY
— 845-451 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 POUGHKEPSI NY
— 845-452 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 POUGHKEPSI 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.