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 315
VERIZON NEW YORK, INC. 216
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 78
PAETEC ITEL, LLC 63
TWC IP ENABLED SERVICES, LLC 46
NEW CINGULAR WIRELESS PCS, LLC - DC 46
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
— 315-397 none assigned yet which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 CONSTABLVL NY
— 315-398 5XXX6XXX7XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LYONS NY
— 315-403 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 SYRACUSE NY
— 315-404 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 UTICA NY
— 315-405 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 WATERTOWN NY
— 315-406 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 AUBURN NY
— 315-407 1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J CAMILLUS NY
— 315-408 2XXX3XXX4XXX5XXX6XXX7XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 WATERTOWN NY
— 315-409 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J LIVERPOOL NY
— 315-410 not yet reported which blocks → PAETEC ITEL, LLC 829J SYRACUSE NY
— 315-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 315-412 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J SYRACUSE NY
— 315-413 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-414 1XXX2XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-415 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 SYRACUSE NY
— 315-416 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SYRACUSE NY
— 315-419 not yet reported which blocks → SPOK, INC. 6630 SYRACUSE NY
— 315-420 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SYRACUSE NY
— 315-421 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-422 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-423 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-424 3XXX which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-425 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-426 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-427 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 SYRACUSE NY
— 315-428 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-429 0XXX1XXX2XXX4XXX5XXX6XXX7XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 DOLGEVILLE NY
— 315-430 9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 SYRACUSE NY
— 315-431 5XXX which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-432 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-433 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-434 5XXX which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-435 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-436 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SYRACUSE NY
— 315-437 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-438 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-439 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SYRACUSE NY
— 315-440 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SYRACUSE NY
— 315-441 not yet reported which blocks → SPOK, INC. 6630 SYRACUSE NY
— 315-442 8XXX which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-443 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-445 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-446 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-447 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SYRACUSE NY
— 315-448 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-449 6XXX7XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-451 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-452 6XXX which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-453 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-454 1XXX2XXX7XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE 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.