NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

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

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, last 30 days
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 27
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
New assignments by month Oct 2026 Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 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
— 518-687 1XXX3XXX4XXX5XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J TROY NY
— 518-688 4XXX5XXX6XXX7XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J SCHENCTADY NY
— 518-689 none assigned yet which blocks → PAETEC ITEL, LLC 829J ALBANY NY
— 518-690 3XXX5XXX6XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J COLONIE NY
— 518-691 3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J SARATOGSPG NY
— 518-692 0XXX1XXX3XXX4XXX5XXX6XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 GREENWICH NY
— 518-693 0XXX2XXX3XXX4XXX5XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J SARATOGSPG NY
— 518-694 1XXX2XXX6XXX7XXX · 2 holders which blocks → TVC ALBANY, INC. DBA FIRSTLIGHT FIBER 7989 ALBANY NY
— 518-695 0XXX1XXX2XXX7XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 SCHUYLERVL NY
— 518-696 6XXX which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 LK LUZERNE NY
— 518-697 0XXX1XXX2XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → TVC ALBANY, INC. DBA FIRSTLIGHT FIBER 7989 HUDSON NY
— 518-698 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 COLONIE NY
— 518-699 0XXX1XXX2XXX6XXX7XXX9XXX · 4 holders which blocks → TVC ALBANY, INC. DBA FIRSTLIGHT FIBER 7989 PLATTSBG NY
— 518-700 not yet reported which blocks → NY
— 518-702 0XXX2XXX4XXX5XXX7XXX8XXX · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K MIDDLEBG NY
— 518-710 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 HUDSON NY
— 518-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 518-712 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → TVC ALBANY, INC. DBA FIRSTLIGHT FIBER 7989 AVERILL PK NY
— 518-713 0XXX3XXX4XXX6XXX7XXX8XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J COLONIE NY

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.