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
Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 314-801 3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 LADUE MO
— 314-802 4XXX7XXX8XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 ST LOUIS MO
— 314-803 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KIRKWOOD MO
— 314-805 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KIRKWOOD MO
— 314-807 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KIRKWOOD MO
— 314-808 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KIRKWOOD MO
— 314-809 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KIRKWOOD MO
— 314-810 2XXX4XXX6XXX7XXX9XXX which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX MO
— 314-812 not yet reported which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-813 0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 LADUE MO
— 314-814 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 ST LOUIS MO
— 314-815 3XXX5XXX8XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 MEHLVILLE MO
— 314-817 4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 LADUE MO
— 314-819 3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 CREVECOEUR MO
— 314-821 not yet reported which blocks → SOUTHWESTERN BELL 9533 KIRKWOOD MO
— 314-822 not yet reported which blocks → SOUTHWESTERN BELL 9533 KIRKWOOD MO
— 314-823 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-824 4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MO 7218 LADUE MO
— 314-826 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-829 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-830 8XXX which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-831 not yet reported which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-832 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-835 7XXX8XXX which blocks → SOUTHWESTERN BELL 9533 KIRKWOOD MO
— 314-836 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 ST LOUIS MO
— 314-837 not yet reported which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-838 not yet reported which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-839 not yet reported which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-841 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 ST LOUIS MO
— 314-842 not yet reported which blocks → SOUTHWESTERN BELL 9533 SAPPINGTON MO
— 314-843 not yet reported which blocks → SOUTHWESTERN BELL 9533 SAPPINGTON MO
— 314-844 not yet reported which blocks → SOUTHWESTERN BELL 9533 CREVECOEUR MO
— 314-845 4XXX which blocks → SOUTHWESTERN BELL 9533 MEHLVILLE MO
— 314-846 not yet reported which blocks → SOUTHWESTERN BELL 9533 OAKVILLE MO
— 314-848 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-849 not yet reported which blocks → SOUTHWESTERN BELL 9533 SAPPINGTON MO
— 314-851 not yet reported which blocks → SOUTHWESTERN BELL 9533 CREVECOEUR MO
— 314-852 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KIRKWOOD MO
— 314-853 none assigned yet which blocks → T-MOBILE USA, INC. 6529 LADUE MO
— 314-854 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-855 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-856 2XXX3XXX5XXX8XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 KIRKWOOD MO
— 314-862 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-863 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-865 9XXX which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-867 not yet reported which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-868 not yet reported which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-869 not yet reported which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-870 not yet reported which blocks → SPOK, INC. 6630 LADUE 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.