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
— 516-622 not yet reported which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 NASSAUZN08 NY
— 516-623 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN06 NY
— 516-624 1XXX4XXX5XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN07 NY
— 516-625 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN04 NY
— 516-626 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN04 NY
— 516-627 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN01 NY
— 516-628 5XXX6XXX7XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN07 NY
— 516-629 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN04 NY
— 516-630 1XXX3XXX4XXX · 3 holders which blocks → METROPOLITAN TELECOMMUNICATIONS - NY 8526 NASSAUZN01 NY
— 516-632 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN06 NY
— 516-634 not yet reported which blocks → PAETEC ITEL, LLC 829J NASSAUZN06 NY
— 516-635 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SELDEN NY
— 516-637 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NASSAUZN07 NY
— 516-638 not yet reported which blocks → SPOK, INC. 6630 NASSAUZN09 NY
— 516-639 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN05 NY
— 516-640 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN05 NY
— 516-641 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NASSAUZN07 NY
— 516-642 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NASSAUZN05 NY
— 516-644 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN08 NY
— 516-645 not yet reported which blocks → SPOK, INC. 6630 NASSAUZN05 NY
— 516-647 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NASSAUZN05 NY
— 516-648 not yet reported which blocks → SPOK, INC. 6630 NASSAUZN08 NY
— 516-649 not yet reported which blocks → SPOK, INC. 6630 NASSAUZN08 NY
— 516-650 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN05 NY
— 516-651 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 NASSAUZN06 NY
— 516-652 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NASSAUZN05 NY
— 516-653 1XXX8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J NASSAUZN08 NY
— 516-654 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NASSAUZN09 NY
— 516-656 1XXX7XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN04 NY
— 516-657 not yet reported which blocks → SPOK, INC. 6630 NASSAUZN05 NY
— 516-658 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SELDEN NY
— 516-659 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN05 NY
— 516-660 6XXX7XXX8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN05 NY
— 516-662 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN05 NY
— 516-663 1XXX which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-664 not yet reported which blocks → ZCALL.COM, INC. 0059 NASSAUZN06 NY
— 516-666 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC- NY 384C NASSAUZN02 NY
— 516-670 1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN06 NY
— 516-671 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN04 NY
— 516-672 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN05 NY
— 516-674 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN04 NY
— 516-676 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN04 NY
— 516-677 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN07 NY
— 516-678 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN06 NY
— 516-679 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN09 NY
— 516-680 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN05 NY
— 516-681 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN08 NY
— 516-682 2XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN07 NY
— 516-683 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-684 0XXX4XXX7XXX8XXX9XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN01 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.