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
— 360-797 1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - WA 4521 PT ANGELES WA
— 360-798 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 VANCOUVER WA
— 360-799 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 SNOHOMISH WA
— 360-801 2XXX3XXX4XXX7XXX8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELFAIR WA
— 360-802 not yet reported which blocks → QWEST CORPORATION 9638 ENUMCLAW WA
— 360-805 7XXX which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 SNOHOMISH WA
— 360-806 not yet reported which blocks → SPOK, INC. 6630 VANCOUVER WA
— 360-807 3XXX4XXX5XXX · 3 holders which blocks → QWEST CORPORATION 9638 CENTRALIA WA
— 360-808 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PT ANGELES WA
— 360-809 1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 PT ANGELES WA
— 360-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WA
— 360-812 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J WHATCOMCTY WA
— 360-813 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BREMERTON WA
— 360-814 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 MT VERNON WA
— 360-815 8XXX9XXX which blocks → T-MOBILE USA, INC. 6529 WHATCOMCTY WA
— 360-816 not yet reported which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 VANCOUVER WA
— 360-817 0XXX which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 CAMAS WA
— 360-818 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CAMAS WA
— 360-820 6XXX7XXX which blocks → T-MOBILE USA, INC. 6529 WHATCOMCTY WA
— 360-821 2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 PTTOWNSEND WA
— 360-822 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - WA 483E SNOHOMISH WA
— 360-823 3XXX6XXX7XXX8XXX9XXX which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 VANCOUVER WA
— 360-824 0XXX1XXX2XXX3XXX5XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 BREMERTON WA
— 360-825 not yet reported which blocks → QWEST CORPORATION 9638 ENUMCLAW WA
— 360-826 0XXX1XXX2XXX7XXX8XXX9XXX · 4 holders which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4423 MT VERNON WA
— 360-828 none assigned yet which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 VANCOUVER 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
— 360-832 0XXX9XXX which blocks → MASHELL TELECOM, INC. 2431 EATONVILLE WA
— 360-833 3XXX which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 CAMAS WA
— 360-834 not yet reported which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 CAMAS WA
— 360-835 6XXX which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 CAMAS WA
— 360-837 0XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 CAMAS WA
— 360-838 3XXX which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 CAMAS WA
— 360-840 2XXX which blocks → T-MOBILE USA, INC. 6529 MT VERNON WA
— 360-841 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 WOODLAND WA
— 360-843 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 BATTLEGRND WA
— 360-844 0XXX2XXX3XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 CAMAS WA
— 360-846 0XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 LONGVIEW WA
— 360-847 not yet reported which blocks → NORTH COUNTY COMMUNICATION CORPORATION - OR 8294 VANCOUVER WA
— 360-848 not yet reported which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4423 MT VERNON WA
— 360-849 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 CATHLAMET WA
— 360-850 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 BREMERTON WA
— 360-852 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 VANCOUVER WA
— 360-853 0XXX1XXX2XXX3XXX5XXX6XXX9XXX · 3 holders which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4423 MT VERNON WA
— 360-854 1XXX3XXX4XXX5XXX6XXX8XXX · 4 holders which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4423 MT VERNON WA
— 360-855 5XXX6XXX7XXX8XXX · 3 holders which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 MT VERNON WA
— 360-856 not yet reported which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4423 MT VERNON WA
— 360-857 0XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 RIDGEFIELD WA
— 360-858 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → QWEST CORPORATION 9638 ROCHESTER 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.