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
— 516-228 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-229 1XXX which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-230 not yet reported which blocks → SPOK, INC. 6630 BRENTWOOD NY
— 516-235 not yet reported which blocks → ZCALL.COM, INC. 0059 NASSAUZN05 NY
— 516-236 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NASSAUZN05 NY
— 516-237 2XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-238 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN05 NY
— 516-239 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN03 NY
— 516-240 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 NASSAUZN05 NY
— 516-241 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN05 NY
— 516-242 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN05 NY
— 516-243 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN05 NY
— 516-244 not yet reported which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NASSAUZN05 NY
— 516-247 6XXX8XXX9XXX · 3 holders which blocks → TC SYSTEMS, INC. - NY 7140 NASSAUZN05 NY
— 516-248 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-249 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 FARMINGDL NY
— 516-250 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NASSAUZN05 NY
— 516-251 not yet reported which blocks → SPOK, INC. 6630 NASSAUZN05 NY
— 516-252 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN05 NY
— 516-255 6XXX7XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN06 NY
— 516-256 8XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN03 NY
— 516-257 not yet reported which blocks → SPOK, INC. 6630 NASSAUZN05 NY
— 516-258 not yet reported which blocks → SPOK, INC. 6630 BRENTWOOD NY
— 516-261 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 NASSAUZN08 NY
— 516-263 not yet reported which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NASSAUZN02 NY
— 516-264 none assigned yet which blocks → VERIZON NEW YORK, INC. 9104 AMITYVILLE NY
— 516-267 not yet reported which blocks → PAETEC ITEL, LLC 829J NASSAUZN05 NY
— 516-270 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN02 NY
— 516-274 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NASSAUZN05 NY
— 516-275 not yet reported which blocks → SPOK, INC. 6630 BRENTWOOD NY
— 516-278 not yet reported which blocks → SPOK, INC. 6630 BRENTWOOD NY
— 516-281 4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J NASSAUZN05 NY
— 516-282 4XXX5XXX6XXX which blocks → PAETEC ITEL, LLC 829J NASSAUZN05 NY
— 516-283 1XXX2XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 COLDSPGHBR NY
— 516-284 1XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J NASSAUZN03 NY
— 516-285 2XXX which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN03 NY
— 516-287 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN05 NY
— 516-290 not yet reported which blocks → SPOK, INC. 6630 NASSAUZN05 NY
— 516-292 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-293 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 FARMINGDL NY
— 516-294 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-295 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN03 NY
— 516-296 0XXX8XXX which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-297 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN05 NY
— 516-298 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NASSAUZN05 NY
— 516-299 0XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN04 NY
— 516-301 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → AT&T - LOCAL 7421 NASSAUZN01 NY
— 516-302 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → AT&T - LOCAL 7421 NASSAUZN02 NY
— 516-303 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 NASSAUZN01 NY
— 516-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX 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.