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
— 518-620 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J AMSTERDAM NY
— 518-622 1XXX4XXX6XXX7XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 CAIRO NY
— 518-623 0XXX6XXX7XXX8XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 WARRENSBG NY
— 518-624 0XXX1XXX7XXX · 3 holders which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 LONG LAKE NY
— 518-625 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TC SYSTEMS, INC. - NY 7140 CATSKILL NY
— 518-626 0XXX1XXX8XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-627 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → VERIZON NEW YORK, INC. 9104 AMSTERDAM NY
— 518-628 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TC SYSTEMS, INC. - NY 7140 HUNTER NY
— 518-629 0XXX1XXX5XXX6XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 TROY NY
— 518-630 0–9 XXXall 10 · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K SCHENCTADY NY
— 518-631 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → VERIZON NEW YORK, INC. 9104 SCHENCTADY NY
— 518-632 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 HARTFORD NY
— 518-633 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 SARATOGSPG NY
— 518-634 0XXX1XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 FREEHOLD NY
— 518-635 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → TC SYSTEMS, INC. - NY 7140 SOBETHLEHM NY
— 518-636 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 GLENSFALLS NY
— 518-637 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → LEVEL 3 TELECOM OF NEW YORK, LP - NY 8473 LAKEPLACID NY
— 518-638 0XXX2XXX3XXX4XXX5XXX7XXX9XXX · 6 holders which blocks → VERIZON NEW YORK, INC. 9104 ARGYLE NY
— 518-639 0XXX1XXX2XXX3XXX6XXX7XXX9XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 FORT ANN NY
— 518-640 1XXX2XXX3XXX5XXX7XXX8XXX · 2 holders which blocks → LEVEL 3 TELECOM OF NEW YORK, LP - NY 8473 COLONIE NY
— 518-641 1XXX2XXX3XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 TELECOM OF NEW YORK, LP - NY 8473 ALBANY NY
— 518-642 4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 GRANVILLE NY
— 518-643 1XXX3XXX4XXX5XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 PERU NY
— 518-644 0XXX1XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 BOLTON LDG NY
— 518-647 0XXX6XXX7XXX · 2 holders which blocks → FRONTIER COMMUNICATIONS OF AUSABLE VALLEY, INC. 0072 ASABLFORKS NY
— 518-648 1XXX3XXX7XXX · 3 holders which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 INDIANLAKE NY
— 518-651 0XXX1XXX2XXX4XXX5XXX6XXX7XXX9XXX · 2 holders which blocks → TVC ALBANY, INC. DBA FIRSTLIGHT FIBER 7989 MALONE NY
— 518-652 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → TVC ALBANY, INC. DBA FIRSTLIGHT FIBER 7989 MECHANICVL NY
— 518-654 0XXX3XXX8XXX · 3 holders which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 CORINTH NY
— 518-656 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 KATTSKL BY NY
— 518-658 not yet reported which blocks → TACONIC TEL. CORP. 0084 BERLIN NY
— 518-659 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 7 holders which blocks → TVC ALBANY, INC. DBA FIRSTLIGHT FIBER 7989 HOOSICKFLS NY
— 518-661 1XXX which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 MAYFIELD NY
— 518-663 0XXX2XXX3XXX4XXX6XXX7XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 PITTSTOWN NY
— 518-664 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 MECHANICVL NY
— 518-665 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC- NY 384C MECHANICVL NY
— 518-668 1XXX8XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 LAKEGEORGE NY
— 518-670 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J MECHANICVL NY
— 518-671 2XXX3XXX4XXX5XXX7XXX8XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 HUDSON NY
— 518-672 0XXX1XXX2XXX3XXX6XXX8XXX9XXX · 6 holders which blocks → VERIZON NEW YORK, INC. 9104 PHILMONT NY
— 518-673 0XXX6XXX7XXX · 2 holders which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 CANAJOHARI NY
— 518-674 4XXX6XXX9XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 AVERILL PK NY
— 518-677 0XXX1XXX4XXX6XXX7XXX9XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 CAMBRIDGE NY
— 518-678 1XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 PALENVILLE NY
— 518-681 0XXX1XXX2XXX6XXX7XXX9XXX · 2 holders which blocks → TVC ALBANY, INC. DBA FIRSTLIGHT FIBER 7989 GLENSFALLS NY
— 518-682 0XXX1XXX2XXX6XXX7XXX9XXX · 4 holders which blocks → TVC ALBANY, INC. DBA FIRSTLIGHT FIBER 7989 SARATOGSPG NY
— 518-683 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J GLENSFALLS NY
— 518-684 3XXX4XXX5XXX7XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J AMSTERDAM NY
— 518-685 1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → TVC ALBANY, INC. DBA FIRSTLIGHT FIBER 7989 LAKEGEORGE NY
— 518-686 2XXX which blocks → VERIZON NEW YORK, INC. 9104 HOOSICKFLS 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.