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 607
VERIZON NEW YORK, INC. 111
TWC IP ENABLED SERVICES, LLC 51
CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 50
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 34
ONVOY, LLC- NY 33
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
Clear Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 607-403 0XXX4XXX6XXX · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K OVID NY
— 607-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 607-423 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 CORTLAND NY
— 607-425 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ELMIRA NY
— 607-426 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ELMIRA NY
— 607-427 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BINGHAMTON NY
— 607-428 not yet reported which blocks → PAETEC ITEL, LLC 829J CORTLAND NY
— 607-431 0XXX3XXX8XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 ONEONTA NY
— 607-432 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ONEONTA NY
— 607-433 7XXX which blocks → VERIZON NEW YORK, INC. 9104 ONEONTA NY
— 607-434 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ONEONTA NY
— 607-435 5XXX6XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ONEONTA NY
— 607-436 5XXX7XXX8XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 ONEONTA NY
— 607-437 2XXX4XXX5XXX6XXX8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ONEONTA NY
— 607-441 3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J ONEONTA NY
— 607-458 not yet reported which blocks → ARMSTRONG TEL. CO. - NY 0071 WOODHULL NY
— 607-467 not yet reported which blocks → DEPOSIT TEL. CO., INC. 0089 DEPOSIT NY
— 607-474 4XXX5XXX9XXX · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K LODI NY
— 607-478 0XXX1XXX2XXX3XXX4XXX6XXX7XXX · 5 holders which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 ANDOVER NY
— 607-481 2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 ELMIRA NY
— 607-483 0–9 XXXall 10 · 3 holders which blocks → PAETEC ITEL, LLC 829J ELMIRA NY
— 607-484 5XXX6XXX7XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J ENDICOTT NY
— 607-486 1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 7 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K CINCINNTUS NY
— 607-498 1XXX2XXX3XXX · 3 holders which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 ROSCOE NY
— 607-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 607-522 not yet reported which blocks → EMPIRE TEL. CORP. 0093 PRATTSBURG NY
— 607-523 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 7 holders which blocks → VERIZON NEW YORK, INC. 9104 LINDLEY NY
— 607-524 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 CATON NY
— 607-525 not yet reported which blocks → ARMSTRONG TEL. CO. - NY 0071 TROUPSBURG NY
— 607-527 0XXX1XXX2XXX4XXX5XXX6XXX7XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 CAMPBELL NY
— 607-529 0XXX2XXX5XXX7XXX · 3 holders which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 CHEMUNG NY
— 607-532 not yet reported which blocks → TRUMANSBURG TELEPHONE COMPANY, INC. 0131 INTERLAKEN NY
— 607-533 0XXX1XXX2XXX6XXX8XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 LANSING NY
— 607-535 1XXX5XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 WATKISGLEN NY
— 607-537 0–9 XXXall 10 · 6 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J ELMIRA NY
— 607-538 0XXX2XXX3XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → VERIZON NEW YORK, INC. 9104 HOBART NY
— 607-539 0XXX2XXX4XXX5XXX8XXX · 4 holders which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 SLATEVLSPG NY
— 607-542 2XXX3XXX4XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CORNING NY
— 607-543 3XXX4XXX · 2 holders which blocks → METROPCS, INC. 5562 CORTLAND NY
— 607-544 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 COOPERSTN NY
— 607-545 0XXX1XXX2XXX3XXX4XXX7XXX9XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 CANASERAGA NY
— 607-546 not yet reported which blocks → EMPIRE TEL. CORP. 0093 BURDETT NY
— 607-547 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 COOPERSTN NY
— 607-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST NY
— 607-561 9XXX which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 SIDNEY NY
— 607-562 0XXX1XXX5XXX6XXX9XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 BIG FLATS NY
— 607-563 not yet reported which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 SIDNEY NY
— 607-564 0XXX1XXX2XXX4XXX5XXX6XXX8XXX · 6 holders which blocks → VERIZON NEW YORK, INC. 9104 NEWFIELD NY
— 607-565 0XXX1XXX5XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 WAVERLY NY
— 607-566 0XXX1XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → VERIZON NEW YORK, INC. 9104 AVOCA 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.