NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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 315
VERIZON NEW YORK, INC. 216
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 78
PAETEC ITEL, LLC 63
TWC IP ENABLED SERVICES, LLC 46
NEW CINGULAR WIRELESS PCS, LLC - DC 46
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
— 315-285 3XXX4XXX5XXX6XXX7XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J CLAYTON NY
— 315-286 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WATERTOWN NY
— 315-287 6XXX8XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 GOUVERNEUR NY
— 315-288 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E CICERO NY
— 315-289 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SYRACUSE NY
— 315-290 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 LYONS NY
— 315-291 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 SKANEATLES NY
— 315-292 0XXX2XXX3XXX4XXX5XXX8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J UTICA NY
— 315-293 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC- NY 384C WOLCOTT NY
— 315-294 0XXX2XXX3XXX4XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J AUBURN NY
— 315-295 not yet reported which blocks → PAETEC ITEL, LLC 829J SYRACUSE NY
— 315-296 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → TC SYSTEMS, INC. - NY 7140 MASSENA NY
— 315-297 0–9 XXXall 10 · 2 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K FULTON NY
— 315-298 0XXX which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 PULASKI NY
— 315-299 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J SYRACUSE NY
— 315-300 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K CHAUMONT NY
— 315-301 0XXX3XXX4XXX6XXX · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K CROGHAN NY
— 315-302 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K HERMON NY
— 315-303 0–9 XXXall 10 · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K BALDWINSVL NY
— 315-304 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K HENDERSON NY
— 315-305 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K BRANCHPORT NY
— 315-306 0XXX1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K ORISKNYFLS NY
— 315-309 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → TC SYSTEMS, INC. - NY 7140 STAR LAKE NY
— 315-310 0–9 XXXall 10 · 4 holders which blocks → PAETEC ITEL, LLC 829J MARION NY
— 315-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 315-312 0XXX which blocks → PAETEC ITEL, LLC 829J OSWEGO NY
— 315-316 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E UTICA NY
— 315-317 6XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 SYRACUSE NY
— 315-318 0XXX1XXX3XXX4XXX · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K PHELPS NY
— 315-319 not yet reported which blocks → CONTACT COMMUNICATIONS, INC. 4721 MADRID NY
— 315-320 3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J CAMILLUS NY
— 315-322 0XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 MADRID NY
— 315-323 9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 MADRID NY
— 315-324 not yet reported which blocks → CITIZENS TEL. CO. OF HAMMOND NY, INC. 0081 HAMMOND NY
— 315-326 1XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J OSWEGO NY
— 315-327 2XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J UTICA NY
— 315-328 not yet reported which blocks → NICHOLVILLE TEL. CO., INC. 0108 NICHOLVL NY
— 315-329 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 FAYETTEVL NY
— 315-330 0XXX1XXX6XXX8XXX9XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 ROME NY
— 315-331 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NEWARK NY
— 315-332 0XXX1XXX6XXX8XXX9XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 NEWARK NY
— 315-334 0XXX which blocks → VERIZON NEW YORK, INC. 9104 ROME NY
— 315-335 none assigned yet which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROME NY
— 315-336 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ROME NY
— 315-337 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ROME NY
— 315-338 4XXX which blocks → VERIZON NEW YORK, INC. 9104 ROME NY
— 315-339 8XXX which blocks → VERIZON NEW YORK, INC. 9104 ROME NY
— 315-340 not yet reported which blocks → SPOK, INC. 6630 GENEVA NY
— 315-341 0XXX4XXX8XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 OSWEGO NY
— 315-342 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 OSWEGO NY

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.