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
— 314-714 0XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J MEHLVILLE MO
— 314-715 1XXX2XXX3XXX4XXX5XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-716 2XXX3XXX8XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-718 1XXX2XXX3XXX4XXX5XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 LADUE MO
— 314-719 none assigned yet which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-720 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MO 4932 CREVECOEUR MO
— 314-721 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-722 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J SAPPINGTON MO
— 314-723 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 ST LOUIS MO
— 314-724 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LADUE MO
— 314-725 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-726 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-727 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-729 not yet reported which blocks → SOUTHWESTERN BELL 9533 SAPPINGTON MO
— 314-730 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 SAPPINGTON MO
— 314-731 6XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-732 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MO 4932 ST LOUIS MO
— 314-734 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 LADUE MO
— 314-738 1XXX3XXX4XXX8XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-739 not yet reported which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-740 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 LADUE MO
— 314-741 not yet reported which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-743 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J LADUE MO
— 314-744 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - MO 093F CREVECOEUR MO
— 314-746 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-747 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-748 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 SAPPINGTON MO
— 314-749 none assigned yet which blocks → T-MOBILE USA, INC. 6529 LADUE MO
— 314-750 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 LADUE MO
— 314-751 not yet reported which blocks → SPOK, INC. 6630 ST LOUIS MO
— 314-752 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-753 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LADUE MO
— 314-754 not yet reported which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 ST LOUIS MO
— 314-756 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → ONVOY, LLC - MO 093F SAPPINGTON MO
— 314-757 8XXX which blocks → T-MOBILE USA, INC. 6529 LADUE MO
— 314-758 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-761 0XXX2XXX which blocks → T-MOBILE USA, INC. 6529 LADUE MO
— 314-762 1XXX6XXX7XXX8XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-763 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-765 5XXX which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-766 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - MO 4932 ST LOUIS MO
— 314-767 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-768 0XXX3XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-769 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-770 not yet reported which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-771 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-772 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-773 9XXX which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-775 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J KIRKWOOD MO
— 314-776 8XXX9XXX · 2 holders 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.