NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

360 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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 26
Rogers Communications Canada Inc. (Wireless) 23
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
— 315-387 0XXX1XXX4XXX7XXX8XXX · 4 holders which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 SANDYCREEK NY
— 315-388 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → VERIZON NEW YORK, INC. 9104 WADDINGTON NY
— 315-389 not yet reported which blocks → NICHOLVILLE TEL. CO., INC. 0108 WINTHROP NY
— 315-390 0XXX4XXX9XXX · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K EAGLE BAY NY
— 315-391 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SYRACUSE NY
— 315-392 7XXX which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 FORESTPORT NY
— 315-393 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 OGDENSBURG NY
— 315-394 1XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 OGDENSBURG NY
— 315-395 not yet reported which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 SYRACUSE NY
— 315-396 0–9 XXXall 10 · 2 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K SYRACUSE NY
— 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

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.