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
— 830-271 0–9 XXXall 10 · 3 holders which blocks → TELNYX LLC 073H DILLEY TX
— 830-274 0XXX2XXX3XXX7XXX8XXX9XXX · 4 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 CHARLOTTE TX
— 830-275 4XXX5XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 UVALDE TX
— 830-276 0XXX1XXX2XXX4XXX6XXX7XXX9XXX · 6 holders which blocks → SOUTHWESTERN BELL 9533 POTEET TX
— 830-277 0XXX7XXX8XXX · 2 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 CHARLOTTE TX
— 830-278 0XXX which blocks → SOUTHWESTERN BELL 9533 UVALDE TX
— 830-279 1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX which blocks → SOUTHWESTERN BELL 9533 UVALDE TX
— 830-281 0XXX1XXX6XXX7XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 PLEASANTON TX
— 830-285 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 KERRVILLE TX
— 830-298 not yet reported which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 DEL RIO TX
— 830-303 not yet reported which blocks → SOUTHWESTERN BELL 9533 SEGUIN TX
— 830-305 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SEGUIN TX
— 830-306 not yet reported which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 DEL RIO TX
— 830-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TX
— 830-313 5XXX7XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DEL RIO TX
— 830-317 2XXX4XXX5XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PEARSALL TX
— 830-320 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - TX 903C DEL RIO TX
— 830-323 not yet reported which blocks → MATRIX TELECOM, LLC. S/I/I TNCI - TX 7715 LACOSTE TX
— 830-324 none assigned yet which blocks → HILL COUNTRY TEL. COOP., INC. 2086 SISTERDALE TX
— 830-329 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KERRVILLE TX
— 830-330 3XXX4XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 JOHNSON CY TX
— 830-332 none assigned yet which blocks → ONVOY, LLC - TX 903C PEARSALL TX
— 830-334 0XXX which blocks → SOUTHWESTERN BELL 9533 PEARSALL TX
— 830-336 6XXX7XXX · 2 holders which blocks → GUADALUPE VALLEY TEL. COOP., INC. 2083 KENBERG TX
— 830-342 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FREDECKSBG TX
— 830-343 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 KERRVILLE TX
— 830-345 not yet reported which blocks → MATRIX TELECOM, LLC. S/I/I TNCI - TX 7715 LYTLE TX
— 830-352 none assigned yet which blocks → METROPCS, INC. 5562 EAGLE PASS TX
— 830-355 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 CASTROVL TX
— 830-357 0–9 XXXall 10 · 5 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 BOERNE TX
— 830-363 not yet reported which blocks → SOUTHWEST TEXAS TEL. CO. 2135 D HANIS TX
— 830-365 0XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → SOUTHWESTERN BELL 9533 LA PRYOR TX
— 830-367 not yet reported which blocks → HILL COUNTRY TEL. COOP., INC. 2086 INGRAM TX
— 830-372 not yet reported which blocks → SOUTHWESTERN BELL 9533 SEGUIN TX
— 830-373 not yet reported which blocks → VALLEY TEL. COOP., INC. 2159 FOWLERTON TX
— 830-374 0XXX which blocks → SOUTHWESTERN BELL 9533 CRYSTAL CY TX
— 830-376 0XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 BATESVILLE TX
— 830-377 none assigned yet which blocks → T-MOBILE USA, INC. 6529 KERRVILLE TX
— 830-378 not yet reported which blocks → VALLEY TEL. COOP., INC. 2159 MILLETT TX
— 830-379 not yet reported which blocks → SOUTHWESTERN BELL 9533 SEGUIN TX
— 830-386 1XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → SOUTHWESTERN BELL 9533 SEGUIN TX
— 830-391 4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FLORESVL TX
— 830-392 0XXX1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 BLANCO TX
— 830-393 not yet reported which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 2154 FLORESVL TX
— 830-395 not yet reported which blocks → SOUTHWEST TEXAS TEL. CO. 2135 VINEGRROON TX
— 830-400 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - TX 903C KENEDY TX
— 830-401 3XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 SEGUIN TX
— 830-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TX
— 830-420 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → SOUTHWESTERN BELL 9533 MARION TX
— 830-423 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HONDO TX

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.