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 253
QWEST CORPORATION 141
T-MOBILE USA, INC. 77
ONVOY, LLC - WA 49
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 48
NEW CINGULAR WIRELESS PCS, LLC 35
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
— 253-934 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

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.