NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

1 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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
— 956-794 0XXX which blocks → SOUTHWESTERN BELL 9533 LAREDO TX
— 956-795 not yet reported which blocks → SOUTHWESTERN BELL 9533 LAREDO TX
— 956-796 not yet reported which blocks → SOUTHWESTERN BELL 9533 LAREDO TX
— 956-797 6XXX7XXX which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 LA FERIA TX
— 956-799 not yet reported which blocks → ALENCO COMMUNICATIONS, INC. 2090 DOLORES TX
— 956-802 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 EDINBURG TX
— 956-806 not yet reported which blocks → TX
— 956-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TX
— 956-821 none assigned yet which blocks → STPCS JOINT VENTURE, LLC 4290 MCALLEN TX
— 956-825 0XXX1XXX2XXX3XXX4XXX6XXX8XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 MERCEDES TX
— 956-830 not yet reported which blocks → TX
— 956-831 not yet reported which blocks → SOUTHWESTERN BELL 9533 BROWNSVL TX
— 956-832 2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 BROWNSVL TX
— 956-838 9XXX which blocks → SOUTHWESTERN BELL 9533 BROWNSVL TX
— 956-842 not yet reported which blocks → VALLEY TEL. COOP., INC. 2159 MCCOOK TX
— 956-843 0XXX which blocks → SOUTHWESTERN BELL 9533 MCALLEN TX
— 956-844 none assigned yet which blocks → STPCS JOINT VENTURE, LLC 4290 ROMA TX
— 956-845 not yet reported which blocks → VALLEY TEL. COOP., INC. 2159 HARGILL TX
— 956-847 3XXX4XXX5XXX8XXX9XXX · 5 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 ROMA TX
— 956-848 0XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → SOUTHWESTERN BELL 9533 FALCON HTS TX
— 956-849 6XXX8XXX · 2 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 ROMA TX
— 956-854 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K WESLACO TX
— 956-857 1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - TX 903C LAREDO TX
— 956-873 4XXX5XXX6XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HARLINGEN TX
— 956-874 0XXX1XXX2XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 EDINBURG TX
— 956-878 0–9 XXXall 10 · 2 holders which blocks → STPCS JOINT VENTURE, LLC 4290 MCALLEN TX
— 956-898 0–9 XXXall 10 · 4 holders which blocks → STPCS JOINT VENTURE, LLC 4290 LAREDO TX
— 956-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TX
— 956-926 9XXX which blocks → SOUTHWESTERN BELL 9533 MCALLEN TX
— 956-928 9XXX which blocks → SOUTHWESTERN BELL 9533 MCALLEN TX
— 956-934 0XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - TX 903C SAN BENITO TX
— 956-936 not yet reported which blocks → BORDER TO BORDER COMMUNICATIONS 2073 FALCON TX
— 956-943 8XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 PORTISABEL TX
— 956-944 not yet reported which blocks → VALLEY TEL. COOP., INC. 2159 PT MANSFLD TX
— 956-948 0XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → SOUTHWESTERN BELL 9533 ENCINAL TX
— 956-950 not yet reported which blocks → TX
— 956-956 not yet reported which blocks → TX
— 956-958 not yet reported which blocks → TX
— 956-959 not yet reported which blocks → TX
— 956-968 not yet reported which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 WESLACO TX
— 956-969 not yet reported which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 WESLACO TX
— 956-971 7XXX which blocks → SOUTHWESTERN BELL 9533 MCALLEN TX
— 956-972 not yet reported which blocks → SOUTHWESTERN BELL 9533 MCALLEN TX
— 956-973 4XXX which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 WESLACO TX
— 956-975 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WESLACO TX
— 956-976 not yet reported which blocks → TX
— 956-982 not yet reported which blocks → SOUTHWESTERN BELL 9533 BROWNSVL TX
— 956-983 0XXX2XXX3XXX8XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 BROWNSVL TX
— 956-984 8XXX9XXX which blocks → SOUTHWESTERN BELL 9533 MCALLEN TX
— 956-986 1XXX which blocks → SOUTHWESTERN BELL 9533 BROWNSVL TX

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.