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 518
VERIZON NEW YORK, INC. 225
PAETEC ITEL, LLC 59
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 58
NEW CINGULAR WIRELESS PCS, LLC - DC 45
TC SYSTEMS, INC. - NY 35
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
— 518-287 not yet reported which blocks → MIDDLEBURGH TEL. CO. 0105 SUMMIT NY
— 518-288 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 BALLSTNSPA NY
— 518-289 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 8 holders which blocks → TVC ALBANY, INC. DBA FIRSTLIGHT FIBER 7989 ROUND LAKE NY
— 518-290 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E SARATOGSPG NY
— 518-292 8XXX which blocks → TC SYSTEMS, INC. - NY 7140 ALBANY NY
— 518-293 0XXX2XXX3XXX4XXX5XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 SARANAC NY
— 518-294 0XXX1XXX3XXX4XXX5XXX7XXX9XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 RICHMONDVL NY
— 518-295 not yet reported which blocks → MIDDLEBURGH TEL. CO. 0105 MIDDLEBG NY
— 518-296 not yet reported which blocks → MIDDLEBURGH TEL. CO. 0105 BRAMANVL NY
— 518-297 not yet reported which blocks → CHAMPLAIN TEL. CO. 0077 ROUSES PT NY
— 518-298 not yet reported which blocks → CHAMPLAIN TEL. CO. 0077 CHAMPLAIN NY
— 518-299 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 PRATTSVL NY
— 518-301 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → TC SYSTEMS, INC. - NY 7140 ALBANY NY
— 518-303 0XXX2XXX3XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 CATSKILL NY
— 518-304 0–9 XXXall 10 · 8 holders which blocks → TC SYSTEMS, INC. - NY 7140 SARANAC LK NY
— 518-306 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → AT&T - LOCAL 7421 SARATOGSPG NY
— 518-308 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 TROY NY
— 518-309 0–9 XXXall 10 · 7 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K BALLSTNSPA NY
— 518-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 518-312 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 ALBANY NY
— 518-314 0XXX2XXX3XXX4XXX5XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J PLATTSBG NY
— 518-316 2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 SARATOGSPG NY
— 518-320 0XXX2XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → TC SYSTEMS, INC. - NY 7140 ALBANY NY
— 518-321 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 GLENSFALLS NY
— 518-322 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → TC SYSTEMS, INC. - NY 7140 ALBANY NY
— 518-323 0XXX1XXX2XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → TVC ALBANY, INC. DBA FIRSTLIGHT FIBER 7989 SARANAC LK NY
— 518-324 none assigned yet which blocks → PRIMELINK, INC. - NY 0065 PLATTSBG NY
— 518-325 not yet reported which blocks → TACONIC TEL. CORP. 0084 HILLSDALE NY
— 518-326 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX which blocks → PAETEC ITEL, LLC 829J TROY NY
— 518-327 0XXX4XXX8XXX which blocks → FRONTIER COMMUNICATIONS OF AUSABLE VALLEY, INC. 0072 PAULSMITHS NY
— 518-328 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J TROY NY
— 518-329 9XXX which blocks → TACONIC TEL. CORP. 0084 COPAKE NY
— 518-330 none assigned yet which blocks → METROPCS, INC. 5562 ALBANY NY
— 518-331 none assigned yet which blocks → METROPCS, INC. 5562 ALBANY NY
— 518-332 4XXX5XXX6XXX7XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 GLOVERSVL NY
— 518-336 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → TC SYSTEMS, INC. - NY 7140 CASTLETON NY
— 518-337 0XXX1XXX3XXX6XXX7XXX8XXX9XXX which blocks → TC SYSTEMS, INC. - NY 7140 ALBANY NY
— 518-338 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 GLENSFALLS NY
— 518-339 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ALBANY NY
— 518-341 not yet reported which blocks → SPOK, INC. 6630 SCHENCTADY NY
— 518-342 not yet reported which blocks → SPOK, INC. 6630 SCHENCTADY NY
— 518-343 not yet reported which blocks → SPOK, INC. 6630 ALBANY NY
— 518-344 0XXX1XXX4XXX6XXX8XXX9XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 SCHENCTADY NY
— 518-346 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SCHENCTADY NY
— 518-347 7XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 SCHENCTADY NY
— 518-348 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 SCHENCTADY NY
— 518-349 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 ALBANY NY
— 518-350 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J SARATOGSPG NY
— 518-351 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → TC SYSTEMS, INC. - NY 7140 SCHROON LK NY
— 518-352 3XXX4XXX5XXX6XXX · 3 holders which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 BLUEMTLAKE 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.