NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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
Clear Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 360-859 3XXX6XXX7XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 VANCOUVER WA
— 360-862 2XXX3XXX4XXX5XXX6XXX7XXX · 2 holders which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 SNOHOMISH WA
— 360-863 2XXX3XXX5XXX6XXX7XXX · 2 holders which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 SNOHOMISH WA
— 360-864 not yet reported which blocks → TOLEDO TEL. CO., INC. 2447 TOLEDO 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
— 360-868 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SHELTON WA
— 360-870 8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 OLYMPIA WA
— 360-871 not yet reported which blocks → QWEST CORPORATION 9638 PORT ORCH WA
— 360-873 0XXX1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4423 MT VERNON WA
— 360-874 3XXX4XXX · 2 holders which blocks → QWEST CORPORATION 9638 PORT ORCH WA
— 360-875 1XXX2XXX3XXX7XXX8XXX · 5 holders which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 SOUTH BEND WA
— 360-876 not yet reported which blocks → QWEST CORPORATION 9638 PORT ORCH WA
— 360-877 2XXX3XXX4XXX · 3 holders which blocks → QWEST CORPORATION 9638 HOODSPORT WA
— 360-878 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 OLYMPIA WA
— 360-879 none assigned yet which blocks → MASHELL TELECOM, INC. 2431 EATONVILLE WA
— 360-880 none assigned yet which blocks → UNITED STATES CELLULAR - WA 6270 CHEHALIS WA
— 360-882 not yet reported which blocks → QWEST CORPORATION 9638 VANCOUVER WA
— 360-883 not yet reported which blocks → QWEST CORPORATION 9638 VANCOUVER WA
— 360-885 not yet reported which blocks → QWEST CORPORATION 9638 VANCOUVER WA
— 360-886 3XXX4XXX5XXX · 2 holders which blocks → QWEST CORPORATION 9638 BLACKDIMND WA
— 360-887 6XXX which blocks → QWEST CORPORATION 9638 RIDGEFIELD WA
— 360-891 not yet reported which blocks → QWEST CORPORATION 9638 VANCOUVER WA
— 360-892 not yet reported which blocks → QWEST CORPORATION 9638 VANCOUVER WA
— 360-893 not yet reported which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 ORTING WA
— 360-894 not yet reported which blocks → YCOM NETWORKS, INC. 2453 YELM WA
— 360-895 not yet reported which blocks → QWEST CORPORATION 9638 PORT ORCH WA
— 360-896 not yet reported which blocks → QWEST CORPORATION 9638 VANCOUVER WA
— 360-897 4XXX5XXX7XXX · 3 holders which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 SO PRAIRIE WA
— 360-898 not yet reported which blocks → HOOD CANAL TEL. CO. 2419 UNION WA
— 360-899 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 MT VERNON WA
— 360-901 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 VANCOUVER WA
— 360-902 not yet reported which blocks → QWEST CORPORATION 9638 OLYMPIA WA
— 360-903 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 VANCOUVER WA
— 360-904 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 VANCOUVER WA
— 360-905 not yet reported which blocks → QWEST CORPORATION 9638 VANCOUVER WA
— 360-906 not yet reported which blocks → QWEST CORPORATION 9638 VANCOUVER WA
— 360-907 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 VANCOUVER WA
— 360-908 7XXX8XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SILVERDALE WA
— 360-909 not yet reported which blocks → T-MOBILE USA, INC. 6529 VANCOUVER WA
— 360-910 not yet reported which blocks → T-MOBILE USA, INC. 6529 VANCOUVER WA
— 360-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WA
— 360-917 2XXX4XXX5XXX6XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J BREMERTON WA
— 360-918 1XXX2XXX3XXX4XXX6XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J OLYMPIA WA
— 360-920 0XXX2XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 WHATCOMCTY WA
— 360-921 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 VANCOUVER WA
— 360-922 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 WHATCOMCTY WA
— 360-923 not yet reported which blocks → QWEST CORPORATION 9638 OLYMPIA WA
— 360-925 0XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 MARYSVILLE WA
— 360-926 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 MARYSVILLE WA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.