NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

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

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, last 30 days
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
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
— 425-744 not yet reported which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 HALLS LAKE WA
— 425-745 not yet reported which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 HALLS LAKE WA
— 425-746 not yet reported which blocks → QWEST CORPORATION 9638 BELLEVUE WA
— 425-747 not yet reported which blocks → QWEST CORPORATION 9638 BELLEVUE WA
— 425-748 4XXX7XXX8XXX9XXX · 2 holders which blocks → QWEST CORPORATION 9638 BELLEVUE WA
— 425-749 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BELLEVUE WA
— 425-750 none assigned yet which blocks → T-MOBILE USA, INC. 6529 EVERETT WA
— 425-753 7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
— 425-754 none assigned yet which blocks → T-MOBILE USA, INC. 6529 EVERETT WA
— 425-755 not yet reported which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KIRKLAND WA
— 425-757 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 RENTON WA
— 425-760 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 EVERETT WA
— 425-761 none assigned yet which blocks → T-MOBILE USA, INC. 6529 BELLEVUE WA
— 425-765 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
— 425-766 none assigned yet which blocks → T-MOBILE USA, INC. 6529 BELLEVUE WA
— 425-771 not yet reported which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 HALLS LAKE WA
— 425-772 4XXX which blocks → T-MOBILE USA, INC. 6529 HALLS LAKE WA
— 425-773 not yet reported which blocks → T-MOBILE USA, INC. 6529 HALLS LAKE WA
— 425-774 not yet reported which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 HALLS LAKE WA
— 425-775 not yet reported which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 HALLS LAKE WA
— 425-776 not yet reported which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 HALLS LAKE WA
— 425-778 not yet reported which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 HALLS LAKE WA
— 425-780 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 BOTHELL WA
— 425-783 9XXX which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 EVERETT WA
— 425-785 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
— 425-786 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 BELLEVUE WA
— 425-787 not yet reported which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 HALLS LAKE WA
— 425-788 not yet reported which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 BOTHELL WA
— 425-789 1XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 EVERETT WA
— 425-790 not yet reported which blocks → ONVOY, LLC - WA 483E BELLEVUE WA
— 425-791 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 EVERETT WA
— 425-793 2XXX which blocks → QWEST CORPORATION 9638 RENTON WA
— 425-795 not yet reported which blocks → ONVOY, LLC - WA 483E BELLEVUE WA
— 425-799 not yet reported which blocks → ONVOY, LLC - WA 483E BELLEVUE WA
— 425-802 4XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
— 425-803 not yet reported which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KIRKLAND WA
— 425-806 not yet reported which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 BOTHELL WA
— 425-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WA
— 425-814 not yet reported which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KIRKLAND WA
— 425-818 not yet reported which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 BELLEVUE WA
— 425-820 not yet reported which blocks → ZIPLY FIBER NORTHWEST LLC DBA ZIPLY FIBER 427K KIRKLAND WA
— 425-821 not yet reported which blocks → ZIPLY FIBER NORTHWEST LLC DBA ZIPLY FIBER 427K KIRKLAND WA
— 425-822 not yet reported which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KIRKLAND WA
— 425-823 not yet reported which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KIRKLAND WA
— 425-825 not yet reported which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KIRKLAND WA
— 425-827 not yet reported which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KIRKLAND WA
— 425-828 not yet reported which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KIRKLAND WA
— 425-829 not yet reported which blocks → T-MOBILE USA, INC. 6529 BELLEVUE WA
— 425-830 none assigned yet which blocks → T-MOBILE USA, INC. 6529 BELLEVUE WA
— 425-831 none assigned yet which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 NORTH BEND WA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.