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 360
QWEST CORPORATION 170
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
— 360-687 not yet reported which blocks → QWEST CORPORATION 9638 BATTLEGRND WA
— 360-690 none assigned yet which blocks → QWEST CORPORATION 9638 VANCOUVER WA
— 360-692 not yet reported which blocks → QWEST CORPORATION 9638 SILVERDALE WA
— 360-693 not yet reported which blocks → QWEST CORPORATION 9638 VANCOUVER WA
— 360-694 not yet reported which blocks → QWEST CORPORATION 9638 VANCOUVER WA
— 360-695 not yet reported which blocks → QWEST CORPORATION 9638 VANCOUVER WA
— 360-696 not yet reported which blocks → QWEST CORPORATION 9638 VANCOUVER WA
— 360-698 not yet reported which blocks → QWEST CORPORATION 9638 SILVERDALE WA
— 360-699 not yet reported which blocks → QWEST CORPORATION 9638 VANCOUVER WA
— 360-704 0XXX8XXX9XXX · 2 holders which blocks → QWEST CORPORATION 9638 OLYMPIA WA
— 360-705 not yet reported which blocks → QWEST CORPORATION 9638 OLYMPIA WA
— 360-709 not yet reported which blocks → QWEST CORPORATION 9638 OLYMPIA WA
— 360-714 not yet reported which blocks → QWEST CORPORATION 9638 WHATCOMCTY WA
— 360-715 not yet reported which blocks → QWEST CORPORATION 9638 WHATCOMCTY WA
— 360-725 not yet reported which blocks → QWEST CORPORATION 9638 OLYMPIA WA
— 360-733 not yet reported which blocks → QWEST CORPORATION 9638 WHATCOMCTY WA
— 360-734 not yet reported which blocks → QWEST CORPORATION 9638 WHATCOMCTY WA
— 360-735 not yet reported which blocks → QWEST CORPORATION 9638 VANCOUVER WA
— 360-736 not yet reported which blocks → QWEST CORPORATION 9638 CENTRALIA WA
— 360-737 not yet reported which blocks → QWEST CORPORATION 9638 VANCOUVER WA
— 360-738 not yet reported which blocks → QWEST CORPORATION 9638 WHATCOMCTY WA
— 360-740 not yet reported which blocks → QWEST CORPORATION 9638 CHEHALIS WA
— 360-741 not yet reported which blocks → QWEST CORPORATION 9638 OLYMPIA WA
— 360-748 none assigned yet which blocks → QWEST CORPORATION 9638 CHEHALIS WA
— 360-750 not yet reported which blocks → QWEST CORPORATION 9638 VANCOUVER WA
— 360-752 not yet reported which blocks → QWEST CORPORATION 9638 WHATCOMCTY WA
— 360-753 not yet reported which blocks → QWEST CORPORATION 9638 OLYMPIA WA
— 360-754 not yet reported which blocks → QWEST CORPORATION 9638 OLYMPIA WA
— 360-756 not yet reported which blocks → QWEST CORPORATION 9638 WHATCOMCTY WA
— 360-758 not yet reported which blocks → QWEST CORPORATION 9638 WHATCOMCTY WA
— 360-759 not yet reported which blocks → QWEST CORPORATION 9638 VANCOUVER WA
— 360-767 1XXX2XXX5XXX7XXX9XXX · 4 holders which blocks → QWEST CORPORATION 9638 CHEHALIS WA
— 360-769 3XXX which blocks → QWEST CORPORATION 9638 PORT ORCH WA
— 360-778 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → QWEST CORPORATION 9638 WHATCOMCTY WA
— 360-782 not yet reported which blocks → QWEST CORPORATION 9638 BREMERTON WA
— 360-785 2XXX5XXX6XXX · 2 holders which blocks → QWEST CORPORATION 9638 WINLOCK WA
— 360-786 not yet reported which blocks → QWEST CORPORATION 9638 OLYMPIA WA
— 360-788 3XXX4XXX5XXX6XXX · 3 holders which blocks → QWEST CORPORATION 9638 WHATCOMCTY WA
— 360-792 not yet reported which blocks → QWEST CORPORATION 9638 BREMERTON WA
— 360-802 not yet reported which blocks → QWEST CORPORATION 9638 ENUMCLAW WA
— 360-807 3XXX4XXX5XXX · 3 holders which blocks → QWEST CORPORATION 9638 CENTRALIA WA
— 360-825 not yet reported which blocks → QWEST CORPORATION 9638 ENUMCLAW WA
— 360-829 7XXX8XXX · 2 holders which blocks → QWEST CORPORATION 9638 BUCKLEY WA
— 360-830 6XXX7XXX8XXX · 2 holders which blocks → QWEST CORPORATION 9638 BREMERTON WA
— 360-858 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → QWEST CORPORATION 9638 ROCHESTER WA
— 360-866 not yet reported which blocks → QWEST CORPORATION 9638 OLYMPIA WA
— 360-867 3XXX8XXX · 2 holders which blocks → QWEST CORPORATION 9638 OLYMPIA WA
— 360-871 not yet reported which blocks → QWEST CORPORATION 9638 PORT ORCH WA
— 360-874 3XXX4XXX · 2 holders which blocks → QWEST CORPORATION 9638 PORT ORCH WA
— 360-876 not yet reported which blocks → QWEST CORPORATION 9638 PORT ORCH WA

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.