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
— 360-927 5XXX6XXX7XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 WHATCOMCTY WA
— 360-928 5XXX6XXX7XXX8XXX which blocks → QWEST CORPORATION 9638 PT ANGELES WA
— 360-929 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 OAK HARBOR WA
— 360-930 0–9 XXXall 10 · 6 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J POULSBO WA
— 360-931 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 VANCOUVER WA
— 360-933 0XXX which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 WHATCOMCTY WA
— 360-934 1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 SOUTH BEND WA
— 360-935 0XXX1XXX2XXX4XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 WHATCOMCTY WA
— 360-936 4XXX which blocks → T-MOBILE USA, INC. 6529 VANCOUVER WA
— 360-937 4XXX which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 WHATCOMCTY WA
— 360-939 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 MARYSVILLE WA
— 360-941 8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MT VERNON WA
— 360-942 1XXX which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 SOUTH BEND WA
— 360-943 not yet reported which blocks → QWEST CORPORATION 9638 OLYMPIA WA
— 360-944 not yet reported which blocks → QWEST CORPORATION 9638 VANCOUVER WA
— 360-945 not yet reported which blocks → WHIDBEY TEL. CO. 2452 PT ROBERTS WA
— 360-948 2XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J CHEHALIS WA
— 360-950 not yet reported which blocks → WA
— 360-951 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 OLYMPIA WA
— 360-952 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 VANCOUVER WA
— 360-954 0XXX1XXX2XXX4XXX6XXX7XXX8XXX · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 CAMAS WA
— 360-956 not yet reported which blocks → QWEST CORPORATION 9638 OLYMPIA WA
— 360-957 5XXX8XXX9XXX · 2 holders which blocks → METROPCS, INC. 5562 LONGVIEW WA
— 360-958 not yet reported which blocks → WA
— 360-959 not yet reported which blocks → WA
— 360-960 0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J YELM WA
— 360-961 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 WHATCOMCTY WA
— 360-962 7XXX which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 FORKS WA
— 360-963 4XXX5XXX6XXX · 2 holders which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 FORKS WA
— 360-965 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 TELECOM OF WASHINGTON, LLC - WA 7455 MARYSVILLE WA
— 360-966 1XXX6XXX8XXX · 3 holders which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4423 WHATCOMCTY WA
— 360-968 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SHELTON WA
— 360-969 4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 OAK HARBOR WA
— 360-970 0XXX2XXX which blocks → T-MOBILE USA, INC. 6529 OLYMPIA WA
— 360-971 not yet reported which blocks → SPOK, INC. 6630 OLYMPIA WA
— 360-973 3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 STEVESPASS WA
— 360-976 not yet reported which blocks → WA
— 360-978 2XXX which blocks → MCDANIEL TEL. CO. 2430 SALKUM WA
— 360-980 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 VANCOUVER WA
— 360-981 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SILVERDALE WA
— 360-982 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 MT VERNON WA
— 360-983 1XXX which blocks → MCDANIEL TEL. CO. 2430 MOSSYROCK WA
— 360-985 none assigned yet which blocks → MCDANIEL TEL. CO. 2430 SALKUM WA
— 360-987 5XXX6XXX7XXX8XXX · 2 holders which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 LKQUINAULT WA
— 360-988 1XXX3XXX which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4423 WHATCOMCTY WA
— 360-990 not yet reported which blocks → T-MOBILE USA, INC. 6529 BREMERTON WA
— 360-991 0XXX2XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 VANCOUVER WA
— 360-992 not yet reported which blocks → QWEST CORPORATION 9638 VANCOUVER WA
— 360-993 not yet reported which blocks → QWEST CORPORATION 9638 VANCOUVER WA
— 360-996 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → UNITED STATES CELLULAR - WA 6270 CHEHALIS 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.