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
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 82
ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 81
T-MOBILE USA, INC. 66
LEVEL 3 COMMUNICATIONS, LLC - WA 61
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
— 360-668 not yet reported which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 SNOHOMISH WA
— 360-670 0XXX2XXX4XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 PT ANGELES WA
— 360-671 not yet reported which blocks → QWEST CORPORATION 9638 WHATCOMCTY WA
— 360-673 not yet reported which blocks → KALAMA TEL. CO. 2426 KALAMA WA
— 360-674 0XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → QWEST CORPORATION 9638 BREMERTON WA
— 360-675 not yet reported which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 OAK HARBOR WA
— 360-676 not yet reported which blocks → QWEST CORPORATION 9638 WHATCOMCTY WA
— 360-677 3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 SKYKOMISH WA
— 360-678 not yet reported which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 OAK HARBOR WA
— 360-679 not yet reported which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 OAK HARBOR WA
— 360-680 1XXX2XXX3XXX5XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 HOOD CANAL WA
— 360-681 not yet reported which blocks → QWEST CORPORATION 9638 PT ANGELES WA
— 360-682 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 OAK HARBOR WA
— 360-683 not yet reported which blocks → QWEST CORPORATION 9638 PT ANGELES WA
— 360-684 0XXX1XXX2XXX3XXX4XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 WHATCOMCTY WA
— 360-685 1XXX3XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 WHATCOMCTY WA
— 360-686 2XXX5XXX6XXX7XXX9XXX · 2 holders which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 YACOLT WA
— 360-687 not yet reported which blocks → QWEST CORPORATION 9638 BATTLEGRND WA
— 360-690 none assigned yet which blocks → QWEST CORPORATION 9638 VANCOUVER WA
— 360-691 8XXX9XXX · 2 holders which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 MARYSVILLE 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
— 360-697 0XXX which blocks → UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - WA 4521 POULSBO 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
— 360-700 not yet reported which blocks → WA
— 360-701 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 OLYMPIA WA
— 360-702 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 BATTLEGRND 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
— 360-707 1XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4423 MT VERNON WA
— 360-708 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 MT VERNON WA
— 360-709 not yet reported which blocks → QWEST CORPORATION 9638 OLYMPIA WA
— 360-710 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SILVERDALE WA
— 360-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WA
— 360-713 1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 VANCOUVER 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
— 360-717 4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - WA 483E HOODSPORT WA
— 360-719 0XXX2XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 VANCOUVER WA
— 360-720 0XXX2XXX5XXX7XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 OAK HARBOR WA
— 360-721 none assigned yet which blocks → T-MOBILE USA, INC. 6529 VANCOUVER WA
— 360-722 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 MARYSVILLE WA
— 360-723 1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 BATTLEGRND WA
— 360-724 1XXX8XXX9XXX · 2 holders which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4423 MT VERNON WA
— 360-725 not yet reported which blocks → QWEST CORPORATION 9638 OLYMPIA WA
— 360-727 0XXX1XXX2XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 RIDGEFIELD 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.