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
— 845-321 7XXX8XXX · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 MIDDLETOWN NY
— 845-326 0XXX1XXX2XXX3XXX4XXX6XXX7XXX · 3 holders which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 MIDDLETOWN NY
— 845-330 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E POUGHKEPSI NY
— 845-331 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 KINGSTON NY
— 845-334 0XXX1XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 KINGSTON NY
— 845-336 9XXX which blocks → VERIZON NEW YORK, INC. 9104 KINGSTON NY
— 845-338 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 KINGSTON NY
— 845-339 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 KINGSTON NY
— 845-340 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 KINGSTON NY
— 845-341 none assigned yet which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 MIDDLETOWN NY
— 845-342 not yet reported which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 MIDDLETOWN NY
— 845-343 not yet reported which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 MIDDLETOWN NY
— 845-344 none assigned yet which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 MIDDLETOWN NY
— 845-346 none assigned yet which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 MIDDLETOWN NY
— 845-348 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NYACK NY
— 845-349 not yet reported which blocks → SPOK, INC. 6630 NYACK NY
— 845-351 0XXX1XXX3XXX6XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 TUXEDO NY
— 845-352 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SPRING VLY NY
— 845-353 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NYACK NY
— 845-354 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SPRING VLY NY
— 845-355 0XXX which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 SLATE HILL NY
— 845-356 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SPRING VLY NY
— 845-357 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SUFFERN NY
— 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

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.