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
— 718-309 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN09 NY
— 718-310 0XXX3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TC SYSTEMS, INC. - NY 7140 NWYRCYZN08 NY
— 718-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 718-312 0–9 XXXall 10 · 6 holders which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN06 NY
— 718-313 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 NWYRCYZN14 NY
— 718-316 0XXX1XXX2XXX3XXX5XXX7XXX8XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 NWYRCYZN08 NY
— 718-317 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN15 NY
— 718-318 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN13 NY
— 718-319 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN04 NY
— 718-320 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN05 NY
— 718-321 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN09 NY
— 718-322 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN10 NY
— 718-323 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN10 NY
— 718-324 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN05 NY
— 718-325 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN05 NY
— 718-326 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN08 NY
— 718-327 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN13 NY
— 718-328 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN03 NY
— 718-329 9XXX which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN03 NY
— 718-330 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN06 NY
— 718-331 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN07 NY
— 718-332 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN07 NY
— 718-333 5XXX which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN07 NY
— 718-334 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN08 NY
— 718-335 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN08 NY
— 718-336 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN07 NY
— 718-337 8XXX which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN13 NY
— 718-338 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN07 NY
— 718-339 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN07 NY
— 718-340 3XXX8XXX9XXX · 2 holders which blocks → TC SYSTEMS, INC. - NY 7140 NWYRCYZN08 NY
— 718-341 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN12 NY
— 718-342 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN06 NY
— 718-343 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN12 NY
— 718-344 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN06 NY
— 718-345 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN06 NY
— 718-346 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN06 NY
— 718-347 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN12 NY
— 718-348 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN06 NY
— 718-349 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN06 NY
— 718-350 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → TC SYSTEMS, INC. - NY 7140 NWYRCYZN08 NY
— 718-351 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN14 NY
— 718-352 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN11 NY
— 718-353 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN09 NY
— 718-354 0XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → TC SYSTEMS, INC. - NY 7140 NWYRCYZN14 NY
— 718-355 0XXX1XXX8XXX9XXX · 2 holders which blocks → TC SYSTEMS, INC. - NY 7140 NWYRCYZN14 NY
— 718-356 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN15 NY
— 718-357 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN09 NY
— 718-358 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN09 NY
— 718-359 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN09 NY
— 718-360 0XXX3XXX6XXX7XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 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.