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 206
QWEST CORPORATION 243
T-MOBILE USA, INC. 95
ONVOY, LLC - WA 72
NEW CINGULAR WIRELESS PCS, LLC 58
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 57
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
— 206-722 not yet reported which blocks → QWEST CORPORATION 9638 SEATTLE WA
— 206-723 not yet reported which blocks → QWEST CORPORATION 9638 SEATTLE WA
— 206-724 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 SEATTLE WA
— 206-725 not yet reported which blocks → QWEST CORPORATION 9638 SEATTLE WA
— 206-726 not yet reported which blocks → QWEST CORPORATION 9638 SEATTLE WA
— 206-727 not yet reported which blocks → QWEST CORPORATION 9638 SEATTLE WA
— 206-728 not yet reported which blocks → QWEST CORPORATION 9638 SEATTLE WA
— 206-729 not yet reported which blocks → QWEST CORPORATION 9638 SEATTLE WA
— 206-730 none assigned yet which blocks → T-MOBILE USA, INC. 6529 SEATTLE WA
— 206-731 7XXX9XXX · 2 holders which blocks → QWEST CORPORATION 9638 SEATTLE WA
— 206-732 4XXX which blocks → QWEST CORPORATION 9638 SEATTLE WA
— 206-733 0XXX which blocks → QWEST CORPORATION 9638 SEATTLE WA
— 206-734 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
— 206-736 not yet reported which blocks → ONVOY, LLC - WA 483E SEATTLE WA
— 206-737 4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - WA 483E SEATTLE WA
— 206-738 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - WA 483E VASHON WA
— 206-740 0–9 XXXwhole prefix which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
— 206-745 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - WA 483E RICHMNDBCH WA
— 206-748 not yet reported which blocks → QWEST CORPORATION 9638 SEATTLE WA
— 206-749 not yet reported which blocks → QWEST CORPORATION 9638 SEATTLE WA
— 206-752 0–9 XXXall 10 · 2 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J SEATTLE WA
— 206-753 7XXX8XXX9XXX which blocks → LEVEL 3 TELECOM OF WASHINGTON, LLC - WA 7455 SEATTLE WA
— 206-754 not yet reported which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 SEATTLE WA
— 206-755 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
— 206-757 not yet reported which blocks → QWEST CORPORATION 9638 SEATTLE WA
— 206-760 not yet reported which blocks → QWEST CORPORATION 9638 SEATTLE WA
— 206-762 not yet reported which blocks → QWEST CORPORATION 9638 SEATTLE WA
— 206-763 not yet reported which blocks → QWEST CORPORATION 9638 SEATTLE WA
— 206-764 not yet reported which blocks → QWEST CORPORATION 9638 SEATTLE WA
— 206-765 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
— 206-766 0XXX which blocks → QWEST CORPORATION 9638 SEATTLE WA
— 206-767 not yet reported which blocks → QWEST CORPORATION 9638 SEATTLE WA
— 206-768 not yet reported which blocks → QWEST CORPORATION 9638 SEATTLE WA
— 206-769 none assigned yet which blocks → T-MOBILE USA, INC. 6529 SEATTLE WA
— 206-770 not yet reported which blocks → QWEST CORPORATION 9638 SEATTLE WA
— 206-772 not yet reported which blocks → QWEST CORPORATION 9638 SEATTLE WA
— 206-774 not yet reported which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
— 206-776 0–9 XXXall 10 · 6 holders which blocks → FIVE9, INC. 598J SEATTLE WA
— 206-777 5XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SEATTLE WA
— 206-778 not yet reported which blocks → T-MOBILE USA, INC. 6529 SEATTLE WA
— 206-779 not yet reported which blocks → T-MOBILE USA, INC. 6529 SEATTLE WA
— 206-780 not yet reported which blocks → QWEST CORPORATION 9638 BAINBDG IS WA
— 206-781 not yet reported which blocks → QWEST CORPORATION 9638 SEATTLE WA
— 206-782 not yet reported which blocks → QWEST CORPORATION 9638 SEATTLE WA
— 206-783 not yet reported which blocks → QWEST CORPORATION 9638 SEATTLE WA
— 206-784 not yet reported which blocks → QWEST CORPORATION 9638 SEATTLE WA
— 206-786 none assigned yet which blocks → T-MOBILE USA, INC. 6529 SEATTLE WA
— 206-788 1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → QWEST CORPORATION 9638 SEATTLE WA
— 206-789 not yet reported which blocks → QWEST CORPORATION 9638 SEATTLE WA
— 206-790 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE 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.