NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

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

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
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 27
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
New assignments by month Oct 2026 Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 516-470 not yet reported which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 NASSAUZN08 NY
— 516-471 0XXX1XXX2XXX3XXX4XXX6XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J NASSAUZN05 NY
— 516-476 not yet reported which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NASSAUZN05 NY
— 516-478 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-479 1XXX4XXX7XXX8XXX9XXX · 3 holders which blocks → TC SYSTEMS, INC. - NY 7140 NASSAUZN05 NY
— 516-480 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SELDEN NY
— 516-481 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-482 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN01 NY
— 516-483 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-484 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN04 NY
— 516-485 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-486 9XXX which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-487 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN01 NY
— 516-488 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN02 NY
— 516-489 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-490 8XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 NASSAUZN08 NY
— 516-496 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN07 NY
— 516-498 7XXX which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN01 NY
— 516-499 0–9 XXXall 10 · 4 holders which blocks → YMAX COMMUNICATIONS CORP. - NY 282E NASSAUZN02 NY
— 516-500 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NASSAUZN05 NY
— 516-501 2XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 FARMINGDL NY
— 516-502 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 NASSAUZN02 NY
— 516-503 not yet reported which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NASSAUZN05 NY
— 516-504 3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN01 NY
— 516-505 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-507 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → AT&T - LOCAL 7421 NASSAUZN05 NY
— 516-508 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → AT&T - LOCAL 7421 NASSAUZN05 NY
— 516-509 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN05 NY
— 516-510 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN05 NY
— 516-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 516-512 0XXX1XXX2XXX3XXX4XXX5XXX7XXX9XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-515 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → AT&T - LOCAL 7421 NASSAUZN05 NY
— 516-518 not yet reported which blocks → ONVOY, LLC- NY 384C NASSAUZN06 NY
— 516-520 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN08 NY
— 516-521 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN05 NY
— 516-522 0XXX1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-523 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NASSAUZN05 NY
— 516-524 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN05 NY
— 516-526 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NASSAUZN05 NY
— 516-527 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SELDEN NY
— 516-528 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NASSAUZN05 NY
— 516-531 2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → VERIZON NEW YORK, INC. 9104 FARMINGDL NY
— 516-532 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NASSAUZN07 NY
— 516-535 0XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-536 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN06 NY
— 516-537 2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 NASSAUZN03 NY
— 516-538 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-539 3XXX which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-541 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN09 NY
— 516-542 8XXX which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.