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 225
VOICESTREAM GSM I, LLC 31
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
2022-10-03 225-497 0–9 XXXall 10 · 4 holders which blocks → VOICESTREAM GSM I, LLC 150C BATONROUGE LA
2020-08-26 225-449 0–9 XXXwhole prefix which blocks → VOICESTREAM GSM I, LLC 150C GONZALES LA
2018-06-19 225-418 0–9 XXXall 10 · 3 holders which blocks → VOICESTREAM GSM I, LLC 150C BATONROUGE LA
2013-07-03 225-210 0–9 XXXall 10 · 3 holders which blocks → VOICESTREAM GSM I, LLC 150C GONZALES LA
2011-11-08 225-224 0–9 XXXall 10 · 5 holders which blocks → VOICESTREAM GSM I, LLC 150C BATONROUGE LA
2011-10-20 225-239 0–9 XXXall 10 · 5 holders which blocks → VOICESTREAM GSM I, LLC 150C BATONROUGE LA
2011-08-09 225-280 0–9 XXXall 10 · 4 holders which blocks → VOICESTREAM GSM I, LLC 150C BATONROUGE LA
2011-06-20 225-249 0–9 XXXwhole prefix which blocks → VOICESTREAM GSM I, LLC 150C BATONROUGE LA
2011-04-15 225-220 0–9 XXXwhole prefix which blocks → VOICESTREAM GSM I, LLC 150C BATONROUGE LA
2009-11-02 225-371 0–9 XXXwhole prefix which blocks → VOICESTREAM GSM I, LLC 150C BATONROUGE LA
2009-02-19 225-361 0–9 XXXall 10 · 4 holders which blocks → VOICESTREAM GSM I, LLC 150C BATONROUGE LA
2005-12-06 225-733 0–9 XXXwhole prefix which blocks → VOICESTREAM GSM I, LLC 150C BATONROUGE LA
2005-10-05 225-650 0–9 XXXall 10 · 4 holders which blocks → VOICESTREAM GSM I, LLC 150C BATONROUGE LA
2001-11-16 225-348 0–9 XXXall 10 · 3 holders which blocks → VOICESTREAM GSM I, LLC 150C GONZALES LA
2001-10-30 225-288 not yet reported which blocks → VOICESTREAM GSM I, LLC 150C BATONROUGE LA
2001-10-23 225-810 0XXX3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → VOICESTREAM GSM I, LLC 150C BATONROUGE LA
2001-09-24 225-803 8XXX which blocks → VOICESTREAM GSM I, LLC 150C BATONROUGE LA
2001-08-23 225-284 not yet reported which blocks → VOICESTREAM GSM I, LLC 150C BATONROUGE LA
2001-05-01 225-279 2XXX3XXX4XXX5XXX8XXX9XXX · 2 holders which blocks → VOICESTREAM GSM I, LLC 150C BATONROUGE LA
— 225-205 none assigned yet which blocks → VOICESTREAM GSM I, LLC 150C BATONROUGE LA
— 225-221 9XXX which blocks → VOICESTREAM GSM I, LLC 150C BATONROUGE LA
— 225-266 none assigned yet which blocks → VOICESTREAM GSM I, LLC 150C BATONROUGE LA
— 225-268 none assigned yet which blocks → VOICESTREAM GSM I, LLC 150C BATONROUGE LA
— 225-300 0–9 XXXall 10 · 6 holders which blocks → VOICESTREAM GSM I, LLC 150C BATONROUGE LA
— 225-312 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → VOICESTREAM GSM I, LLC 150C BATONROUGE LA
— 225-413 none assigned yet which blocks → VOICESTREAM GSM I, LLC 150C BATONROUGE LA
— 225-445 8XXX9XXX · 2 holders which blocks → VOICESTREAM GSM I, LLC 150C BATONROUGE LA
— 225-623 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → VOICESTREAM GSM I, LLC 150C LUTCHER LA
— 225-624 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 8 holders which blocks → VOICESTREAM GSM I, LLC 150C VACHERIE LA
— 225-802 none assigned yet which blocks → VOICESTREAM GSM I, LLC 150C BATONROUGE LA
— 225-806 none assigned yet which blocks → VOICESTREAM GSM I, LLC 150C BATONROUGE LA

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.