NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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
— 518-546 0XXX1XXX2XXX4XXX5XXX6XXX8XXX · 6 holders which blocks → VERIZON NEW YORK, INC. 9104 PORT HENRY NY
— 518-547 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 PUTNAM NY
— 518-548 0XXX1XXX · 2 holders which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 LKPLEASANT NY
— 518-550 not yet reported which blocks → NY
— 518-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST NY
— 518-557 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 SCHENCTADY NY
— 518-560 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ALBANY NY
— 518-561 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 PLATTSBG NY
— 518-562 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 PLATTSBG NY
— 518-563 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 PLATTSBG NY
— 518-564 0XXX1XXX8XXX9XXX · 4 holders which blocks → PRIMELINK, INC. - NY 0065 PLATTSBG NY
— 518-565 0XXX1XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 PLATTSBG NY
— 518-566 1XXX3XXX4XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 PLATTSBG NY
— 518-567 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 TELECOM OF NEW YORK, LP - NY 8473 HUDSON NY
— 518-568 0XXX1XXX4XXX6XXX8XXX · 5 holders which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 ST JOHNSVL NY
— 518-569 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 PLATTSBG NY
— 518-570 3XXX4XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PLATTSBG NY
— 518-572 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PLATTSBG NY
— 518-573 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ALBANY NY
— 518-574 not yet reported which blocks → CONTACT COMMUNICATIONS, INC. 4721 PLATTSBG NY
— 518-576 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → VERIZON NEW YORK, INC. 9104 KEENE NY
— 518-577 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ALBANY NY
— 518-578 0XXX1XXX2XXX3XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 PLATTSBG NY
— 518-579 0XXX1XXX6XXX7XXX9XXX · 4 holders which blocks → TVC ALBANY, INC. DBA FIRSTLIGHT FIBER 7989 SCHENCTADY NY
— 518-580 3XXX which blocks → VERIZON NEW YORK, INC. 9104 SARATOGSPG NY
— 518-581 6XXX which blocks → VERIZON NEW YORK, INC. 9104 SARATOGSPG NY
— 518-582 0XXX7XXX8XXX · 3 holders which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 NEWCOMB NY
— 518-583 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SARATOGSPG NY
— 518-584 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SARATOGSPG NY
— 518-585 1XXX4XXX8XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 TICONDROGA NY
— 518-586 0XXX1XXX2XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → TVC ALBANY, INC. DBA FIRSTLIGHT FIBER 7989 TICONDROGA NY
— 518-587 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SARATOGSPG NY
— 518-589 1XXX2XXX3XXX4XXX7XXX8XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 TANNERSVL NY
— 518-590 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → VERIZON NEW YORK, INC. 9104 TROY NY
— 518-591 4XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-593 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 PLATTSBG NY
— 518-594 0XXX1XXX2XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 ELENBGDPOT NY
— 518-595 0XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J ALTAMONT NY
— 518-597 not yet reported which blocks → CROWN POINT TEL. CORP. 0085 CROWNPOINT NY
— 518-598 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-600 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC- NY 384C SARANAC NY
— 518-602 3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J BALLSTNSPA NY
— 518-604 0XXX1XXX4XXX6XXX7XXX · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K CAROGALAKE NY
— 518-606 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 ALBANY NY
— 518-608 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 TELECOM OF NEW YORK, LP - NY 8473 COLONIE NY
— 518-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 518-612 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → TC SYSTEMS, INC. - NY 7140 SCHENCTADY NY
— 518-613 0XXX1XXX4XXX7XXX9XXX · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K MAYFIELD NY
— 518-614 0–9 XXXall 10 · 6 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 ALBANY NY
— 518-615 3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J GLENSFALLS NY

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.