NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

338 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, last 30 days
8X8, INC. 38
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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
— 253-761 6XXX which blocks → QWEST CORPORATION 9638 TACOMA WA
— 253-765 0XXX1XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 DES MOINES WA
— 253-766 0XXX1XXX2XXX3XXX4XXX5XXX7XXX9XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 KENT WA
— 253-770 not yet reported which blocks → QWEST CORPORATION 9638 PUYALLUP WA
— 253-773 not yet reported which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 KENT WA
— 253-777 2XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 TACOMA WA
— 253-778 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMAWVLY WA
— 253-779 not yet reported which blocks → QWEST CORPORATION 9638 TACOMA WA
— 253-780 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → ONVOY, LLC - WA 483E GRAHAM WA
— 253-785 1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - WA 483E DES MOINES WA
— 253-792 0XXX1XXX9XXX · 2 holders which blocks → QWEST CORPORATION 9638 TACOMA WA
— 253-793 not yet reported which blocks → ONVOY, LLC - WA 483E AUBURN WA
— 253-797 4XXX5XXX6XXX8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
— 253-798 not yet reported which blocks → QWEST CORPORATION 9638 TACOMA WA
— 253-799 not yet reported which blocks → ONVOY, LLC - WA 483E PUYALLUP WA
— 253-802 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - WA 483E AUBURN WA
— 253-804 not yet reported which blocks → QWEST CORPORATION 9638 AUBURN WA
— 253-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WA
— 253-813 not yet reported which blocks → QWEST CORPORATION 9638 KENT WA
— 253-815 not yet reported which blocks → QWEST CORPORATION 9638 DES MOINES WA
— 253-820 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
— 253-826 not yet reported which blocks → QWEST CORPORATION 9638 SUMNER WA
— 253-830 4XXX which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 TACOMA WA
— 253-831 4XXX9XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 TACOMAWVLY WA
— 253-833 not yet reported which blocks → QWEST CORPORATION 9638 AUBURN WA
— 253-835 not yet reported which blocks → QWEST CORPORATION 9638 DES MOINES WA
— 253-838 not yet reported which blocks → QWEST CORPORATION 9638 DES MOINES WA
— 253-839 not yet reported which blocks → QWEST CORPORATION 9638 DES MOINES WA
— 253-840 not yet reported which blocks → QWEST CORPORATION 9638 PUYALLUP WA
— 253-841 not yet reported which blocks → QWEST CORPORATION 9638 PUYALLUP WA
— 253-843 6XXX7XXX8XXX · 2 holders which blocks → QWEST CORPORATION 9638 ROY WA
— 253-845 not yet reported which blocks → QWEST CORPORATION 9638 PUYALLUP WA
— 253-846 not yet reported which blocks → QWEST CORPORATION 9638 GRAHAM WA
— 253-847 not yet reported which blocks → QWEST CORPORATION 9638 GRAHAM WA
— 253-848 not yet reported which blocks → QWEST CORPORATION 9638 PUYALLUP WA
— 253-850 not yet reported which blocks → QWEST CORPORATION 9638 KENT WA
— 253-851 not yet reported which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 GIG HARBOR WA
— 253-852 not yet reported which blocks → QWEST CORPORATION 9638 KENT WA
— 253-853 not yet reported which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 GIG HARBOR WA
— 253-854 not yet reported which blocks → QWEST CORPORATION 9638 KENT WA
— 253-856 not yet reported which blocks → QWEST CORPORATION 9638 KENT WA
— 253-857 not yet reported which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 GIG HARBOR WA
— 253-858 not yet reported which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 GIG HARBOR WA
— 253-859 not yet reported which blocks → QWEST CORPORATION 9638 KENT WA
— 253-861 0XXX2XXX which blocks → T-MOBILE USA, INC. 6529 TACOMA WA
— 253-862 not yet reported which blocks → QWEST CORPORATION 9638 SUMNER WA
— 253-863 not yet reported which blocks → QWEST CORPORATION 9638 SUMNER WA
— 253-864 not yet reported which blocks → QWEST CORPORATION 9638 PUYALLUP WA
— 253-867 4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 KENT WA
— 253-872 not yet reported which blocks → QWEST CORPORATION 9638 KENT 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.