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
2020-09-30 314-806 0–9 XXXall 10 · 3 holders which blocks → HD CARRIER LLC 321J ST LOUIS MO
2020-09-21 314-834 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - MO 993E SAPPINGTON MO
2020-06-30 314-847 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 LADUE MO
2020-06-09 314-916 0–9 XXXall 10 · 4 holders which blocks → CSC WIRELESS, LLC 425J ST LOUIS MO
2020-04-06 314-760 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ST LOUIS MO
2020-03-31 314-904 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MO 093F ST LOUIS MO
2020-02-11 314-470 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MO 093F OAKVILLE MO
2020-01-13 314-883 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 ST LOUIS MO
2019-12-24 314-208 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SAPPINGTON MO
2019-11-15 314-742 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MO 7218 MEHLVILLE MO
2019-10-25 314-866 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H LADUE MO
2019-10-25 314-946 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H KIRKWOOD MO
2019-10-24 314-789 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H CREVECOEUR MO
2019-10-16 314-796 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MO 7218 CREVECOEUR MO
2019-10-15 314-671 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KIRKWOOD MO
2019-10-10 314-788 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H ST LOUIS MO
2019-09-23 314-648 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CREVECOEUR MO
2019-09-13 314-710 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H ST LOUIS MO
2019-08-20 314-697 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KIRKWOOD MO
2019-07-24 314-668 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 ST LOUIS MO
2019-06-14 314-476 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - MO 993E ST LOUIS MO
2019-05-15 314-639 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - MO 993E KIRKWOOD MO
2019-05-14 314-530 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - MO 093F ST LOUIS MO
2019-04-29 314-634 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KIRKWOOD MO
2019-02-27 314-798 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - MO 993E ST LOUIS MO
2019-02-26 314-759 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KIRKWOOD MO
2019-02-15 314-547 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 LADUE MO
2019-01-31 314-820 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MO 7218 LADUE MO
2018-12-17 314-586 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KIRKWOOD MO
2018-08-21 314-463 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MO 7218 LADUE MO
2018-08-15 314-408 0–9 XXXall 10 · 5 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K MEHLVILLE MO
2018-07-13 314-370 0–9 XXXall 10 · 5 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K CREVECOEUR MO
2018-03-05 314-924 0–9 XXXall 10 · 5 holders which blocks → EXIANT COMMUNICATIONS LLC 114J ST LOUIS MO
2018-02-05 314-257 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MO 7218 ST LOUIS MO
2017-11-06 314-624 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CREVECOEUR MO
2017-08-30 314-390 0–9 XXXall 10 · 4 holders which blocks → VONAGE AMERICA LLC 197D ST LOUIS MO
2017-08-22 314-597 0–9 XXXwhole prefix which blocks → ONVOY, LLC - MO 093F ST LOUIS MO
2017-08-03 314-944 0–9 XXXall 10 · 2 holders which blocks → COMMIO, LLC 939H ST LOUIS MO
2017-07-03 314-347 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - MO 993E SAPPINGTON MO
2017-06-23 314-931 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LADUE MO
2017-04-06 314-582 0–9 XXXwhole prefix which blocks → ONVOY, LLC - MO 093F ST LOUIS MO
2016-12-23 314-818 0–9 XXXall 10 · 8 holders which blocks → TELNYX LLC 073H ST LOUIS MO
2016-10-31 314-519 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 ST LOUIS MO
2016-10-25 314-462 0–9 XXXall 10 · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K KIRKWOOD MO
2016-09-19 314-461 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - MO 093F MEHLVILLE MO
2016-09-19 314-926 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MO 093F KIRKWOOD MO
2016-08-30 314-528 0–9 XXXall 10 · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K LADUE MO
2016-08-26 314-343 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CREVECOEUR MO
2016-07-22 314-354 0–9 XXXall 10 · 6 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K ST LOUIS MO
2016-04-14 314-405 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 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.