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
Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 253-874 not yet reported which blocks → QWEST CORPORATION 9638 DES MOINES WA
— 253-875 not yet reported which blocks → QWEST CORPORATION 9638 GRAHAM WA
— 253-876 4XXX5XXX6XXX · 2 holders which blocks → QWEST CORPORATION 9638 AUBURN WA
— 253-879 not yet reported which blocks → QWEST CORPORATION 9638 TACOMA WA
— 253-884 8XXX which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 GIG HARBOR WA
— 253-886 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 AUBURN WA
— 253-887 not yet reported which blocks → QWEST CORPORATION 9638 AUBURN WA
— 253-891 not yet reported which blocks → QWEST CORPORATION 9638 SUMNER WA
— 253-893 3XXX4XXX6XXX8XXX9XXX · 2 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 KENT WA
— 253-896 not yet reported which blocks → QWEST CORPORATION 9638 TACOMAWVLY WA
— 253-903 not yet reported which blocks → SPOK, INC. 6630 TACOMA WA
— 253-905 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
— 253-906 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
— 253-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WA
— 253-912 not yet reported which blocks → QWEST CORPORATION 9638 TACOMA WA
— 253-921 9XXX which blocks → T-MOBILE USA, INC. 6529 TACOMAWVLY WA
— 253-922 not yet reported which blocks → QWEST CORPORATION 9638 TACOMAWVLY WA
— 253-924 9XXX which blocks → QWEST CORPORATION 9638 TACOMAWVLY WA
— 253-925 not yet reported which blocks → QWEST CORPORATION 9638 TACOMAWVLY WA
— 253-926 not yet reported which blocks → QWEST CORPORATION 9638 TACOMAWVLY WA
— 253-927 not yet reported which blocks → QWEST CORPORATION 9638 TACOMAWVLY WA
— 253-931 not yet reported which blocks → QWEST CORPORATION 9638 AUBURN WA
— 253-934 not yet reported which blocks → QWEST CORPORATION 9638 TACOMA WA
— 253-939 not yet reported which blocks → QWEST CORPORATION 9638 AUBURN WA
— 253-941 not yet reported which blocks → QWEST CORPORATION 9638 DES MOINES WA
— 253-942 not yet reported which blocks → QWEST CORPORATION 9638 TACOMAWVLY WA
— 253-943 6XXX which blocks → QWEST CORPORATION 9638 TACOMAWVLY WA
— 253-945 not yet reported which blocks → QWEST CORPORATION 9638 DES MOINES WA
— 253-946 not yet reported which blocks → QWEST CORPORATION 9638 DES MOINES WA
— 253-948 2XXX6XXX7XXX8XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 TACOMA WA
— 253-950 not yet reported which blocks → WA
— 253-951 none assigned yet which blocks → T-MOBILE USA, INC. 6529 AUBURN WA
— 253-952 not yet reported which blocks → QWEST CORPORATION 9638 TACOMAWVLY WA
— 253-954 0XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 TACOMAWVLY WA
— 253-958 not yet reported which blocks → WA
— 253-959 not yet reported which blocks → WA
— 253-961 0XXX2XXX which blocks → T-MOBILE USA, INC. 6529 TACOMA WA
— 253-964 not yet reported which blocks → QWEST CORPORATION 9638 TACOMA WA
— 253-970 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
— 253-973 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
— 253-976 not yet reported which blocks → WA
— 253-981 2XXX3XXX4XXX5XXX · 2 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 KENT WA
— 253-982 not yet reported which blocks → QWEST CORPORATION 9638 TACOMA WA
— 253-983 not yet reported which blocks → QWEST CORPORATION 9638 TACOMA WA
— 253-984 not yet reported which blocks → QWEST CORPORATION 9638 TACOMA WA
— 253-985 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
— 253-988 none assigned yet which blocks → T-MOBILE USA, INC. 6529 TACOMA WA
— 254-200 not yet reported which blocks → BRIGHTSPEED OF TEXAS, INC. 2114 KILLEEN TX
— 254-202 not yet reported which blocks → SOUTHWESTERN BELL 9533 WACO TX
— 254-206 2XXX3XXX4XXX5XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 GATESVILLE TX

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.