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 314
T-MOBILE USA, INC. 94
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
2021-11-08 314-907 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LADUE MO
2021-08-26 314-861 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ST LOUIS MO
2021-08-26 314-906 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 ST LOUIS MO
2021-08-04 314-901 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LADUE MO
2015-06-09 314-386 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 LADUE MO
2014-11-07 314-793 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LADUE MO
2014-03-07 314-309 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 ST LOUIS MO
2014-03-03 314-896 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ST LOUIS MO
2014-02-28 314-764 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LADUE MO
2013-11-08 314-745 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 ST LOUIS MO
2013-10-22 314-755 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LADUE MO
2013-09-19 314-201 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 LADUE MO
2013-09-19 314-728 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 ST LOUIS MO
2013-08-08 314-326 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 ST LOUIS MO
2013-06-14 314-665 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ST LOUIS MO
2013-05-23 314-319 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 ST LOUIS MO
2013-04-19 314-203 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ST LOUIS MO
2013-04-19 314-585 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 LADUE MO
2013-02-19 314-305 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 ST LOUIS MO
2013-01-15 314-526 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 KIRKWOOD MO
2012-03-14 314-441 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LADUE MO
2011-11-15 314-299 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 LADUE MO
2011-11-15 314-357 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LADUE MO
2011-11-15 314-459 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LADUE MO
2011-06-27 314-358 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LADUE MO
2011-05-23 314-717 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 KIRKWOOD MO
2008-06-11 314-828 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 ST LOUIS MO
2007-11-07 314-546 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ST LOUIS MO
2007-09-21 314-685 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ST LOUIS MO
2006-09-26 314-686 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 KIRKWOOD MO
2006-07-25 314-556 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ST LOUIS MO
2006-04-05 314-827 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 ST LOUIS MO
2005-06-06 314-448 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ST LOUIS MO
2002-03-19 314-221 none assigned yet which blocks → T-MOBILE USA, INC. 6529 KIRKWOOD MO
2001-12-19 314-456 0XXX2XXX4XXX5XXX7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 LADUE MO
2001-01-18 314-458 0XXX2XXX which blocks → T-MOBILE USA, INC. 6529 LADUE MO
— 314-220 none assigned yet which blocks → T-MOBILE USA, INC. 6529 CREVECOEUR MO
— 314-226 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ST LOUIS MO
— 314-229 not yet reported which blocks → T-MOBILE USA, INC. 6529 ST LOUIS MO
— 314-249 2XXX which blocks → T-MOBILE USA, INC. 6529 LADUE MO
— 314-265 none assigned yet which blocks → T-MOBILE USA, INC. 6529 LADUE MO
— 314-267 none assigned yet which blocks → T-MOBILE USA, INC. 6529 ST LOUIS MO
— 314-276 none assigned yet which blocks → T-MOBILE USA, INC. 6529 LADUE MO
— 314-280 none assigned yet which blocks → T-MOBILE USA, INC. 6529 ST LOUIS MO
— 314-283 none assigned yet which blocks → T-MOBILE USA, INC. 6529 LADUE MO
— 314-322 none assigned yet which blocks → T-MOBILE USA, INC. 6529 LADUE MO
— 314-323 none assigned yet which blocks → T-MOBILE USA, INC. 6529 LADUE MO
— 314-324 none assigned yet which blocks → T-MOBILE USA, INC. 6529 LADUE MO
— 314-359 6XXX7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 LADUE MO
— 314-363 0XXX2XXX which blocks → T-MOBILE USA, INC. 6529 LADUE MO

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.