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
SOUTHWESTERN BELL 255
NEW CINGULAR WIRELESS PCS, LLC - IL 101
T-MOBILE USA, INC. 94
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 53
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 51
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
2012-10-16 314-399 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 ST LOUIS MO
2012-05-23 314-666 0–9 XXXall 10 · 2 holders which blocks → PEERLESS NETWORK OF MISSOURI, LLC - MO 225F LADUE MO
2012-05-22 314-300 0–9 XXXall 10 · 7 holders which blocks → PEERLESS NETWORK OF MISSOURI, LLC - MO 225F ST LOUIS MO
2012-04-05 314-942 0–9 XXXall 10 · 4 holders which blocks → PAETEC ITEL, LLC 829J LADUE MO
2012-03-30 314-502 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 ST LOUIS MO
2012-03-14 314-441 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LADUE MO
2012-03-02 314-695 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 LADUE MO
2011-12-22 314-281 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LADUE MO
2011-12-22 314-287 0–9 XXXall 10 · 6 holders which blocks → AT&T ENTERPRISES, LLC 516C KIRKWOOD 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
2011-10-03 314-296 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MO 4932 ST LOUIS MO
2011-06-27 314-358 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LADUE MO
2011-06-03 314-499 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - MO 993E ST LOUIS MO
2011-05-23 314-717 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 KIRKWOOD MO
2010-05-24 314-403 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - MO 993E KIRKWOOD MO
2008-10-08 314-285 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ST LOUIS MO
2008-10-08 314-295 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ST LOUIS MO
2008-08-21 314-627 0–9 XXXwhole prefix which blocks → PEERLESS NETWORK OF MISSOURI, LLC - MO 225F ST LOUIS MO
2008-06-25 314-884 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - MO 993E ST LOUIS MO
2008-06-19 314-332 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ST LOUIS MO
2008-06-19 314-338 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ST LOUIS MO
2008-06-11 314-828 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 ST LOUIS MO
2008-06-03 314-925 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 ST LOUIS MO
2008-05-28 314-536 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ST LOUIS MO
2008-05-28 314-561 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ST LOUIS MO
2008-04-15 314-932 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - MO 093F ST LOUIS MO
2008-03-06 314-243 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ST LOUIS MO
2008-03-06 314-327 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ST LOUIS MO
2008-03-06 314-437 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ST LOUIS MO
2008-03-06 314-532 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ST LOUIS MO
2008-02-19 314-337 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 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
2007-07-11 314-875 0–9 XXXall 10 · 2 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K ST LOUIS MO
2007-04-13 314-825 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KIRKWOOD MO
2007-02-08 314-735 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 ST LOUIS MO
2006-12-22 314-681 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KIRKWOOD MO
2006-12-19 314-774 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KIRKWOOD MO
2006-11-28 314-273 0–9 XXXwhole prefix which blocks → SOUTHWESTERN BELL 9533 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
2006-02-24 314-676 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 ST LOUIS MO
2005-06-06 314-448 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ST LOUIS MO
2005-04-19 314-737 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LADUE MO
2005-04-08 314-677 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KIRKWOOD MO
2003-11-14 314-251 0–9 XXXwhole prefix which blocks → SOUTHWESTERN BELL 9533 LADUE MO
2003-11-10 314-969 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS 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.