NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

360 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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, last 30 days
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - IL 26
Rogers Communications Canada Inc. (Wireless) 23
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
— 314-605 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KIRKWOOD MO
— 314-606 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KIRKWOOD MO
— 314-607 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KIRKWOOD MO
— 314-608 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KIRKWOOD MO
— 314-609 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KIRKWOOD MO
— 314-610 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 LADUE MO
— 314-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX MO
— 314-612 0XXX4XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-613 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-614 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LADUE MO
— 314-615 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-616 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LADUE MO
— 314-619 6XXX7XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 LADUE MO
— 314-620 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → AT&T - LOCAL 7421 KIRKWOOD MO
— 314-621 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-622 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-623 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KIRKWOOD MO
— 314-625 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → ONVOY, LLC - MO 093F LADUE MO
— 314-626 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - MO 993E KIRKWOOD MO
— 314-628 0XXX1XXX7XXX8XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 CREVECOEUR MO
— 314-629 not yet reported which blocks → T-MOBILE USA, INC. 6529 ST LOUIS MO
— 314-630 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KIRKWOOD MO
— 314-631 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-632 6XXX which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-633 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-635 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MO 4932 SAPPINGTON MO
— 314-637 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 LADUE MO
— 314-638 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-640 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KIRKWOOD MO
— 314-641 1XXX4XXX6XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-642 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - MO 4932 LADUE MO
— 314-643 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LADUE MO
— 314-644 8XXX which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-645 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-646 9XXX which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-647 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-649 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MO 7218 MEHLVILLE MO
— 314-650 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KIRKWOOD MO
— 314-651 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LADUE MO
— 314-652 3XXX which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-653 not yet reported which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-654 not yet reported which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-655 8XXX which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MO 7218 ST LOUIS MO
— 314-656 6XXX7XXX8XXX9XXX · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MO 7218 LADUE MO
— 314-657 0XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MO 7218 ST LOUIS MO
— 314-658 4XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-659 0XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MO 7218 ST LOUIS MO
— 314-660 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KIRKWOOD MO
— 314-662 5XXX7XXX which blocks → T-MOBILE USA, INC. 6529 LADUE MO
— 314-663 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 ST LOUIS MO

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.