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 719
T-MOBILE USA, INC. 49
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
2022-04-25 719-412 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 COLORDOSPG CO
2022-01-27 719-920 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 COLORDOSPG CO
2020-07-29 719-507 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 PUEBLO CO
2020-01-09 719-420 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 PUEBLO CO
2016-08-23 719-308 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 COLORDOSPG CO
2014-09-01 719-415 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 PUEBLO CO
2014-02-20 719-722 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 COLORDOSPG CO
2014-02-12 719-281 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 PUEBLO CO
2013-09-09 719-354 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 COLORDOSPG CO
2013-05-22 719-453 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 COLORDOSPG CO
2013-04-16 719-551 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 COLORDOSPG CO
2010-11-10 719-452 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 COLORDOSPG CO
2002-06-27 719-369 0XXX1XXX2XXX3XXX4XXX5XXX6XXX which blocks → T-MOBILE USA, INC. 6529 PUEBLO CO
2001-10-09 719-334 none assigned yet which blocks → T-MOBILE USA, INC. 6529 PUEBLO CO
2001-05-21 719-209 7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 COLORDOSPG CO
2001-04-24 719-229 not yet reported which blocks → T-MOBILE USA, INC. 6529 COLORDOSPG CO
2001-04-24 719-231 not yet reported which blocks → T-MOBILE USA, INC. 6529 COLORDOSPG CO
2001-04-24 719-232 not yet reported which blocks → T-MOBILE USA, INC. 6529 COLORDOSPG CO
2001-04-24 719-406 not yet reported which blocks → T-MOBILE USA, INC. 6529 PUEBLO CO
2001-04-05 719-213 0XXX1XXX2XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 COLORDOSPG CO
2001-01-29 719-205 none assigned yet which blocks → T-MOBILE USA, INC. 6529 COLORDOSPG CO
— 719-200 0XXX1XXX2XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 COLORDOSPG CO
— 719-201 not yet reported which blocks → T-MOBILE USA, INC. 6529 COLORDOSPG CO
— 719-210 0XXX which blocks → T-MOBILE USA, INC. 6529 COLORDOSPG CO
— 719-233 none assigned yet which blocks → T-MOBILE USA, INC. 6529 COLORDOSPG CO
— 719-240 none assigned yet which blocks → T-MOBILE USA, INC. 6529 PUEBLO CO
— 719-243 8XXX9XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 COLORDOSPG CO
— 719-271 not yet reported which blocks → T-MOBILE USA, INC. 6529 COLORDOSPG CO
— 719-287 not yet reported which blocks → T-MOBILE USA, INC. 6529 COLORDOSPG CO
— 719-290 4XXX which blocks → T-MOBILE USA, INC. 6529 COLORDOSPG CO
— 719-291 6XXX which blocks → T-MOBILE USA, INC. 6529 COLORDOSPG CO
— 719-310 0XXX which blocks → T-MOBILE USA, INC. 6529 COLORDOSPG CO
— 719-320 none assigned yet which blocks → T-MOBILE USA, INC. 6529 PUEBLO CO
— 719-321 not yet reported which blocks → T-MOBILE USA, INC. 6529 COLORDOSPG CO
— 719-360 not yet reported which blocks → T-MOBILE USA, INC. 6529 COLORDOSPG CO
— 719-407 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 COLORDOSPG CO
— 719-459 4XXX which blocks → T-MOBILE USA, INC. 6529 COLORDOSPG CO
— 719-460 none assigned yet which blocks → T-MOBILE USA, INC. 6529 COLORDOSPG CO
— 719-491 none assigned yet which blocks → T-MOBILE USA, INC. 6529 COLORDOSPG CO
— 719-492 9XXX which blocks → T-MOBILE USA, INC. 6529 COLORDOSPG CO
— 719-499 none assigned yet which blocks → T-MOBILE USA, INC. 6529 COLORDOSPG CO
— 719-654 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 COLORDOSPG CO
— 719-671 none assigned yet which blocks → T-MOBILE USA, INC. 6529 PUEBLO CO
— 719-761 0XXX2XXX which blocks → T-MOBILE USA, INC. 6529 COLORDOSPG CO
— 719-821 none assigned yet which blocks → T-MOBILE USA, INC. 6529 PUEBLO CO
— 719-924 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → T-MOBILE USA, INC. 6529 PUEBLO CO
— 719-930 0XXX2XXX which blocks → T-MOBILE USA, INC. 6529 COLORDOSPG CO
— 719-963 none assigned yet which blocks → T-MOBILE USA, INC. 6529 COLORDOSPG CO
— 719-964 none assigned yet which blocks → T-MOBILE USA, INC. 6529 COLORDOSPG CO

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.