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 718
VERIZON NEW YORK, INC. 555
TC SYSTEMS, INC. - NY 43
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 37
LEVEL 3 COMMUNICATIONS, LLC - NY 25
NEW CINGULAR WIRELESS PCS, LLC - DC 19
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
— 718-514 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN05 NY
— 718-515 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN05 NY
— 718-517 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J NWYRCYZN09 NY
— 718-518 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN04 NY
— 718-519 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN05 NY
— 718-520 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN10 NY
— 718-521 2XXX4XXX5XXX6XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN10 NY
— 718-522 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN06 NY
— 718-523 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN10 NY
— 718-524 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K NWYRCYZN14 NY
— 718-525 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN12 NY
— 718-526 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN10 NY
— 718-527 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN12 NY
— 718-528 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN12 NY
— 718-529 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN10 NY
— 718-530 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → TC SYSTEMS, INC. - NY 7140 NWYRCYZN05 NY
— 718-531 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN07 NY
— 718-532 4XXX6XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 NWYRCYZN06 NY
— 718-533 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN08 NY
— 718-534 not yet reported which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 NWYRCYZN06 NY
— 718-535 not yet reported which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 NWYRCYZN07 NY
— 718-536 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 NWYRCYZN04 NY
— 718-537 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN03 NY
— 718-538 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN03 NY
— 718-539 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN09 NY
— 718-541 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN06 NY
— 718-542 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN03 NY
— 718-543 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN05 NY
— 718-544 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN10 NY
— 718-545 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN08 NY
— 718-546 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN08 NY
— 718-547 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN05 NY
— 718-548 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN05 NY
— 718-549 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN05 NY
— 718-551 1XXX2XXX4XXX5XXX6XXX7XXX8XXX which blocks → PAETEC ITEL, LLC 829J NWYRCYZN10 NY
— 718-552 0XXX1XXX2XXX5XXX6XXX7XXX · 4 holders which blocks → RCN TELECOM SERVICES, INC. - NY 7353 NWYRCYZN06 NY
— 718-553 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN10 NY
— 718-554 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J NWYRCYZN15 NY
— 718-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST NY
— 718-556 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN14 NY
— 718-557 0XXX7XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN10 NY
— 718-558 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN10 NY
— 718-559 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 NWYRCYZN09 NY
— 718-560 3XXX which blocks → LEVEL 3 TELECOM OF NEW YORK, LP - NY 8473 NWYRCYZN06 NY
— 718-561 9XXX which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN03 NY
— 718-562 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN03 NY
— 718-563 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN03 NY
— 718-564 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN06 NY
— 718-565 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN08 NY
— 718-566 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN06 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.