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
2026-05-21 314-981 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KIRKWOOD MO
2025-09-19 314-840 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ST LOUIS MO
2025-09-09 314-430 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 LADUE MO
2025-05-16 314-404 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KIRKWOOD MO
2023-03-15 314-636 0–9 XXXall 10 · 5 holders which blocks → LEAP TELECOM, LLC 616J OAKVILLE MO
2023-02-10 314-557 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 732J LADUE MO
2023-01-30 314-816 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LADUE MO
2022-12-13 314-417 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - MO 993E LADUE MO
2022-12-08 314-217 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KIRKWOOD MO
2022-10-18 314-314 0–9 XXXwhole prefix which blocks → ONVOY, LLC - MO 093F ST LOUIS MO
2022-10-18 314-618 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H LADUE MO
2022-08-25 314-928 0–9 XXXall 10 · 5 holders which blocks → NUSO, LLC 732J ST LOUIS MO
2022-08-08 314-986 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 LADUE MO
2022-08-08 314-987 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MO 093F MEHLVILLE MO
2022-08-08 314-998 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MO 093F CREVECOEUR MO
2022-07-28 314-980 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 LADUE MO
2022-07-22 314-979 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 LADUE MO
2022-06-21 314-978 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - MO 993E ST LOUIS MO
2022-05-09 314-350 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MO 093F KIRKWOOD MO
2022-03-10 314-617 0–9 XXXall 10 · 4 holders which blocks → PAETEC ITEL, LLC 829J ST LOUIS MO
2022-03-10 314-988 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H OAKVILLE MO
2022-02-08 314-970 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - MO 093F ST LOUIS MO
2022-01-11 314-947 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - MO 093F MEHLVILLE MO
2022-01-11 314-948 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - MO 093F SAPPINGTON MO
2021-12-08 314-940 0–9 XXXall 10 · 6 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J ST LOUIS MO
2021-12-08 314-967 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LADUE MO
2021-11-08 314-907 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LADUE MO
2021-11-08 314-936 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - MO 093F CREVECOEUR MO
2021-09-17 314-937 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SAPPINGTON MO
2021-09-03 314-860 0–9 XXXall 10 · 3 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J ST LOUIS 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
2021-08-25 314-876 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MO 093F ST LOUIS MO
2021-08-04 314-901 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LADUE MO
2021-07-30 314-794 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MO 093F OAKVILLE MO
2021-07-27 314-893 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KIRKWOOD MO
2021-06-04 314-673 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H CREVECOEUR MO
2021-05-24 314-804 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MO 093F MEHLVILLE MO
2021-05-05 314-850 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LADUE MO
2021-04-29 314-891 0–9 XXXall 10 · 5 holders which blocks → STRATUS NETWORKS 495J LADUE MO
2021-04-13 314-661 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - MO 993E SAPPINGTON MO
2021-03-26 314-897 0–9 XXXall 10 · 5 holders which blocks → TWILIO INTERNATIONAL, INC. 506J ST LOUIS MO
2021-03-12 314-949 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - MO 093F LADUE MO
2021-02-04 314-912 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - MO 093F ST LOUIS MO
2021-02-03 314-886 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - MO 093F CREVECOEUR MO
2020-12-17 314-864 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MO 7218 CREVECOEUR MO
2020-12-08 314-784 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - MO 093F MEHLVILLE MO
2020-12-02 314-857 0–9 XXXall 10 · 4 holders which blocks → IP HORIZON LLC 515J ST LOUIS MO
2020-11-03 314-887 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - MO 993E ST LOUIS MO
2020-10-19 314-464 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - MO 093F OAKVILLE 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.