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
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
2006-05-17 845-392 0–9 XXXall 10 · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 POUGHKEPSI NY
2001-11-29 845-489 0–9 XXXall 10 · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 POUGHKEPSI NY
2001-03-23 845-652 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 PEARLRIVER NY
— 845-225 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 CARMEL NY
— 845-228 3XXX6XXX8XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 CARMEL NY
— 845-229 3XXX which blocks → VERIZON NEW YORK, INC. 9104 HYDE PARK NY
— 845-236 0XXX1XXX2XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → VERIZON NEW YORK, INC. 9104 MARLBORO NY
— 845-246 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SAUGERTIES NY
— 845-247 1XXX3XXX4XXX5XXX6XXX7XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 SAUGERTIES NY
— 845-254 0XXX1XXX2XXX3XXX7XXX8XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 FLEISCHMAS NY
— 845-255 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NEW PALTZ NY
— 845-256 5XXX6XXX7XXX8XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 NEW PALTZ NY
— 845-265 0XXX1XXX6XXX8XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 COLDSPRING NY
— 845-266 0XXX1XXX2XXX6XXX7XXX9XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 CLINTONCOR NY
— 845-267 1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 CONGERS NY
— 845-268 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 CONGERS NY
— 845-276 0XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → VERIZON NEW YORK, INC. 9104 CROTON FLS NY
— 845-278 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 BREWSTER NY
— 845-279 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 BREWSTER NY
— 845-292 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 LIBERTY NY
— 845-295 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → VERIZON NEW YORK, INC. 9104 LIBERTY NY
— 845-296 5XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 WAPIGRSFLS NY
— 845-297 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 WAPIGRSFLS NY
— 845-298 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 WAPIGRSFLS NY
— 845-312 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 XXXXXXXXXX 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
— 845-348 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 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
— 845-356 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
— 845-362 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SPRING VLY 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
— 845-368 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
— 845-373 0XXX1XXX2XXX3XXX5XXX6XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 AMENIA 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

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.