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
— 518-478 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-479 1XXX2XXX5XXX7XXX9XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-480 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J GLENSFALLS NY
— 518-481 0XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 MALONE NY
— 518-482 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-483 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 MALONE NY
— 518-484 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 ALBANY NY
— 518-485 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-486 0XXX8XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-487 0XXX1XXX4XXX8XXX9XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-488 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-489 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-490 0XXX2XXX3XXX4XXX5XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J BALLSTNSPA NY
— 518-492 0XXX1XXX3XXX4XXX5XXX6XXX8XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 DANNEMORA NY
— 518-493 not yet reported which blocks → CHAZY & WESTPORT TEL. CORP. 0079 WEST CHAZY NY
— 518-494 8XXX which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 CHESTERTN NY
— 518-495 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ALBANY NY
— 518-496 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ALBANY NY
— 518-497 0XXX1XXX2XXX4XXX5XXX7XXX8XXX9XXX · 8 holders which blocks → VERIZON NEW YORK, INC. 9104 CHATEAUGAY NY
— 518-498 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 COLONIE NY
— 518-499 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → VERIZON NEW YORK, INC. 9104 WHITEHALL NY
— 518-500 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC- NY 384C CENTRALBDG NY
— 518-503 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 7 holders which blocks → TC SYSTEMS, INC. - NY 7140 TICONDROGA NY
— 518-504 0–9 XXXall 10 · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K WARRENSBG NY
— 518-505 0XXX which blocks → METROPCS, INC. 5562 ALBANY NY
— 518-506 0XXX which blocks → METROPCS, INC. 5562 ALBANY NY
— 518-507 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 SCHUYLERVL NY
— 518-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 518-514 8XXX which blocks → PAETEC ITEL, LLC 829J ALBANY NY
— 518-515 0XXX1XXX2XXX5XXX7XXX · 5 holders which blocks → TELXMEDIA, INC. - NY 744H CROWNPOINT NY
— 518-519 0–9 XXXall 10 · 5 holders which blocks → HD CARRIER LLC 321J RICHMONDVL NY
— 518-521 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TC SYSTEMS, INC. - NY 7140 MALONE NY
— 518-522 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ALBANY NY
— 518-523 6XXX which blocks → VERIZON NEW YORK, INC. 9104 LAKEPLACID NY
— 518-524 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 LAKEPLACID NY
— 518-525 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-526 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ALBANY NY
— 518-527 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ALBANY NY
— 518-529 1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 7 holders which blocks → VERIZON NEW YORK, INC. 9104 MOIRA NY
— 518-531 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 7 holders which blocks → TC SYSTEMS, INC. - NY 7140 GREENWICH NY
— 518-532 1XXX3XXX4XXX5XXX6XXX8XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 SCHROON LK NY
— 518-533 0XXX4XXX5XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J ALBANY NY
— 518-534 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX which blocks → PAETEC ITEL, LLC 829J PLATTSBG NY
— 518-536 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J PLATTSBG NY
— 518-537 not yet reported which blocks → GERMANTOWN TEL. CO., INC. 0097 GERMANTOWN NY
— 518-538 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 GLENSFALLS NY
— 518-540 0XXX1XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → TVC ALBANY, INC. DBA FIRSTLIGHT FIBER 7989 ALBANY NY
— 518-541 0–9 XXXall 10 · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H MECHANICVL NY
— 518-542 none assigned yet which blocks → METROPCS, INC. 5562 ALBANY NY
— 518-543 0XXX1XXX2XXX3XXX4XXX5XXX7XXX9XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 HAGUE 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.