NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

1 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, last 30 days — NPA 956
8X8, INC. 1
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
— 956-690 1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 8 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 RAYMONDVL TX
— 956-691 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 732J LAREDO TX
— 956-700 not yet reported which blocks → TX
— 956-702 not yet reported which blocks → SOUTHWESTERN BELL 9533 PHARR TX
— 956-706 0–9 XXXwhole prefix which blocks → STPCS JOINT VENTURE, LLC 4290 HARLINGEN TX
— 956-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TX
— 956-712 not yet reported which blocks → SOUTHWESTERN BELL 9533 LAREDO TX
— 956-716 none assigned yet which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 RIGRANDECY TX
— 956-717 not yet reported which blocks → SOUTHWESTERN BELL 9533 LAREDO TX
— 956-718 not yet reported which blocks → SOUTHWESTERN BELL 9533 LAREDO TX
— 956-721 6XXX which blocks → SOUTHWESTERN BELL 9533 LAREDO TX
— 956-722 not yet reported which blocks → SOUTHWESTERN BELL 9533 LAREDO TX
— 956-723 not yet reported which blocks → SOUTHWESTERN BELL 9533 LAREDO TX
— 956-724 not yet reported which blocks → SOUTHWESTERN BELL 9533 LAREDO TX
— 956-725 not yet reported which blocks → SOUTHWESTERN BELL 9533 LAREDO TX
— 956-726 not yet reported which blocks → SOUTHWESTERN BELL 9533 LAREDO TX
— 956-727 not yet reported which blocks → SOUTHWESTERN BELL 9533 LAREDO TX
— 956-728 not yet reported which blocks → SOUTHWESTERN BELL 9533 LAREDO TX
— 956-729 not yet reported which blocks → SOUTHWESTERN BELL 9533 LAREDO TX
— 956-730 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 HARLINGEN TX
— 956-734 2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → AT&T - LOCAL 7421 HARLINGEN TX
— 956-739 not yet reported which blocks → STPCS JOINT VENTURE, LLC 4290 MCALLEN TX
— 956-740 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LAREDO TX
— 956-743 not yet reported which blocks → VALLEY TEL. COOP., INC. 2159 STILLMAN TX
— 956-744 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LAREDO TX
— 956-748 0XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → SOUTHWESTERN BELL 9533 RIO HONDO TX
— 956-750 3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → STPCS JOINT VENTURE, LLC 4290 ZAPATA TX
— 956-752 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 HARLINGEN TX
— 956-753 not yet reported which blocks → SOUTHWESTERN BELL 9533 LAREDO TX
— 956-755 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 BROWNSVL TX
— 956-758 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF TEXAS, LLC - TX 177F ENCINAL TX
— 956-760 not yet reported which blocks → SOUTHWESTERN BELL 9533 HARLINGEN TX
— 956-761 9XXX which blocks → SOUTHWESTERN BELL 9533 PORTISABEL TX
— 956-762 0–9 XXXall 10 · 4 holders which blocks → COMMIO, LLC 939H MCALLEN TX
— 956-763 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LAREDO TX
— 956-764 0XXX9XXX which blocks → SOUTHWESTERN BELL 9533 LAREDO TX
— 956-765 0XXX2XXX7XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 ZAPATA TX
— 956-771 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LAREDO TX
— 956-772 0XXX2XXX3XXX4XXX5XXX7XXX8XXX · 6 holders which blocks → SOUTHWESTERN BELL 9533 PORTISABEL TX
— 956-778 none assigned yet which blocks → STPCS JOINT VENTURE, LLC 4290 HARLINGEN TX
— 956-781 not yet reported which blocks → SOUTHWESTERN BELL 9533 PHARR TX
— 956-782 6XXX which blocks → SOUTHWESTERN BELL 9533 PHARR TX
— 956-783 not yet reported which blocks → SOUTHWESTERN BELL 9533 PHARR TX
— 956-784 0XXX1XXX2XXX4XXX5XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 PHARR TX
— 956-787 not yet reported which blocks → SOUTHWESTERN BELL 9533 PHARR TX
— 956-789 not yet reported which blocks → STPCS JOINT VENTURE, LLC 4290 MCALLEN TX
— 956-790 0XXX8XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 LAREDO TX
— 956-791 not yet reported which blocks → SOUTHWESTERN BELL 9533 LAREDO TX
— 956-792 none assigned yet which blocks → STPCS JOINT VENTURE, LLC 4290 HARLINGEN TX
— 956-793 none assigned yet which blocks → STPCS JOINT VENTURE, LLC 4290 HARLINGEN TX

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.