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
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
2026-03-20 253-450 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMAWVLY WA
2025-12-05 253-440 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2025-09-05 253-430 0XXX1XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 GIG HARBOR WA
2025-07-14 253-427 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2024-11-26 253-420 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 AUBURN WA
2024-10-15 253-419 0XXX1XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 KENT WA
2022-03-25 253-364 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SUMNER WA
2021-08-31 253-367 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 GRAHAM WA
2021-03-10 253-296 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 DES MOINES WA
2019-10-31 253-264 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SUMNER WA
2019-04-17 253-325 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMAWVLY WA
2018-04-05 253-993 0–9 XXXall 10 · 7 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMAWVLY WA
2011-08-02 253-448 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2011-07-22 253-329 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 AUBURN WA
2011-03-25 253-348 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2010-01-12 253-432 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 GIG HARBOR WA
2008-07-07 253-365 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2005-10-05 253-304 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2004-10-29 253-495 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2001-08-21 253-347 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 AUBURN WA
2001-04-26 253-315 5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 AUBURN WA
— 253-209 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
— 253-219 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
— 253-229 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
— 253-241 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
— 253-279 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
— 253-670 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 AUBURN WA
— 253-678 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
— 253-709 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 AUBURN WA
— 253-778 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMAWVLY 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
— 253-970 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
— 253-985 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 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.