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 469
SOUTHWESTERN BELL 50
SOUTHWESTERN BELL TELEPHONE COMPANY - TX 13
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
2020-07-21 469-852 0–9 XXXwhole prefix which blocks → SOUTHWESTERN BELL 9533 DALLAS TX
2019-02-28 469-695 0–9 XXXwhole prefix which blocks → SOUTHWESTERN BELL 9533 DALLAS TX
2019-02-20 469-604 0–9 XXXall 10 · 4 holders which blocks → SOUTHWESTERN BELL 9533 FRISCO TX
2018-03-29 469-462 0–9 XXXwhole prefix which blocks → SOUTHWESTERN BELL 9533 FRISCO TX
2017-09-12 469-428 0–9 XXXall 10 · 4 holders which blocks → SOUTHWESTERN BELL 9533 FRISCO TX
2016-09-08 469-862 0–9 XXXall 10 · 5 holders which blocks → SOUTHWESTERN BELL 9533 DALLAS TX
2016-05-24 469-832 0–9 XXXwhole prefix which blocks → SOUTHWESTERN BELL 9533 DALLAS TX
2015-09-18 469-295 0–9 XXXall 10 · 2 holders which blocks → SOUTHWESTERN BELL 9533 DALLAS TX
2014-08-28 469-294 0–9 XXXall 10 · 4 holders which blocks → SOUTHWESTERN BELL 9533 FRISCO TX
2014-06-27 469-292 0–9 XXXwhole prefix which blocks → SOUTHWESTERN BELL TELEPHONE COMPANY - TX 7726 PLANO TX
2013-06-19 469-291 0–9 XXXall 10 · 4 holders which blocks → SOUTHWESTERN BELL 9533 DALLAS TX
2013-01-25 469-204 0–9 XXXwhole prefix which blocks → SOUTHWESTERN BELL 9533 DALLAS TX
2012-11-02 469-413 0–9 XXXwhole prefix which blocks → SOUTHWESTERN BELL 9533 DALLAS TX
2012-11-02 469-419 0–9 XXXwhole prefix which blocks → SOUTHWESTERN BELL 9533 DALLAS TX
2012-03-27 469-282 0–9 XXXwhole prefix which blocks → SOUTHWESTERN BELL TELEPHONE COMPANY - TX 7726 IRVING TX
2011-09-16 469-240 0–9 XXXall 10 · 7 holders which blocks → SOUTHWESTERN BELL TELEPHONE COMPANY - TX 7726 LEWISVILLE TX
2011-04-20 469-800 0–9 XXXwhole prefix which blocks → SOUTHWESTERN BELL 9533 DALLAS TX
2010-04-29 469-764 0–9 XXXwhole prefix which blocks → SOUTHWESTERN BELL 9533 MCKINNEY TX
2008-09-11 469-219 0–9 XXXall 10 · 5 holders which blocks → SOUTHWESTERN BELL 9533 MCKINNEY TX
2008-03-05 469-303 0–9 XXXwhole prefix which blocks → SOUTHWESTERN BELL TELEPHONE COMPANY - TX 7726 PLANO TX
2004-04-01 469-362 0–9 XXXwhole prefix which blocks → SOUTHWESTERN BELL 9533 FRISCO TX
2003-05-20 469-488 0–9 XXXwhole prefix which blocks → SOUTHWESTERN BELL TELEPHONE COMPANY - TX 7726 PLANO TX
2002-05-15 469-552 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 RED OAK TX
2002-04-11 469-665 0XXX8XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 DALLAS TX
2002-04-09 469-229 1XXX2XXX3XXX7XXX · 2 holders which blocks → SOUTHWESTERN BELL TELEPHONE COMPANY - TX 7726 PLANO TX
2001-06-06 469-201 not yet reported which blocks → SOUTHWESTERN BELL 9533 DALLAS TX
2001-04-25 469-335 2XXX3XXX4XXX6XXX7XXX which blocks → SOUTHWESTERN BELL 9533 DALLAS TX
2001-04-25 469-364 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 DALLAS TX
2001-03-01 469-698 1XXX3XXX4XXX5XXX6XXX · 5 holders which blocks → SOUTHWESTERN BELL 9533 ROCKWALL TX
— 469-227 0XXX which blocks → SOUTHWESTERN BELL 9533 DALLAS TX
— 469-232 7XXX8XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 DALLAS TX
— 469-241 not yet reported which blocks → SOUTHWESTERN BELL TELEPHONE COMPANY - TX 7726 PLANO TX
— 469-255 not yet reported which blocks → SOUTHWESTERN BELL 9533 DALLAS TX
— 469-272 1XXX6XXX8XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 CEDAR HILL TX
— 469-330 not yet reported which blocks → SOUTHWESTERN BELL 9533 DALLAS TX
— 469-334 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → SOUTHWESTERN BELL 9533 DALLAS TX
— 469-365 2XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 FRISCO TX
— 469-372 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 DALLAS TX
— 469-374 1XXX5XXX8XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 DALLAS TX
— 469-384 2XXX7XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 FRISCO TX
— 469-417 8XXX9XXX which blocks → SOUTHWESTERN BELL TELEPHONE COMPANY - TX 7726 IRVING TX
— 469-420 0XXX5XXX8XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 DALLAS TX
— 469-467 not yet reported which blocks → SOUTHWESTERN BELL TELEPHONE COMPANY - TX 7726 PLANO TX
— 469-477 not yet reported which blocks → SOUTHWESTERN BELL 9533 DALLAS TX
— 469-522 2XXX3XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 DALLAS TX
— 469-524 3XXX8XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL TELEPHONE COMPANY - TX 7726 IRVING TX
— 469-549 2XXX3XXX9XXX which blocks → SOUTHWESTERN BELL TELEPHONE COMPANY - TX 7726 LEWISVILLE TX
— 469-567 0XXX3XXX7XXX8XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 DALLAS TX
— 469-593 not yet reported which blocks → SOUTHWESTERN BELL 9533 DALLAS TX
— 469-624 not yet reported which blocks → SOUTHWESTERN BELL 9533 DALLAS 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.