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
Clear Download CSV ↓
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 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.