NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
ONVOY, LLC - CA 21
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
— 323-987 0XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LSAN DA 04 CA
— 323-988 2XXX8XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 13 CA
— 323-992 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 09 CA
— 323-993 not yet reported which blocks → PACIFIC BELL 9740 LSAN DA 14 CA
— 323-995 1XXX which blocks → UTILITY TELECOM GROUP, LLC - CA 9262 LSAN DA 13 CA
— 323-998 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 LSAN DA 11 CA
— 323-999 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LSAN DA 03 CA
— 324-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX FL
— 324-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX FL
— 324-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX FL
— 324-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX FL
— 324-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST FL
— 324-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX FL
— 324-700 not yet reported which blocks → FL
— 324-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX FL
— 324-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX FL
— 324-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX FL
— 324-950 not yet reported which blocks → FL
— 324-958 not yet reported which blocks → FL
— 324-959 not yet reported which blocks → FL
— 324-976 not yet reported which blocks → FL
— 325-208 0–9 XXXall 10 · 7 holders which blocks → YMAX COMMUNICATIONS CORP. - TX 327E BALLINGER TX
— 325-210 not yet reported which blocks → TX
— 325-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TX
— 325-213 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SAN ANGELO TX
— 325-217 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BROWNWOOD TX
— 325-223 not yet reported which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 SAN ANGELO TX
— 325-224 not yet reported which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 SAN ANGELO TX
— 325-226 7XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OZONA TX
— 325-227 0–9 XXXall 10 · 2 holders which blocks → CSC VOICE, LLC 612K SAN ANGELO TX
— 325-228 not yet reported which blocks → TAYLOR TEL. COOP., INC. 2151 LUEDERS TX
— 325-232 0–9 XXXall 10 · 3 holders which blocks → CSC VOICE, LLC 612K ABILENE TX
— 325-234 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SAN ANGELO TX
— 325-235 not yet reported which blocks → SOUTHWESTERN BELL 9533 SWEETWATER TX
— 325-236 0XXX1XXX2XXX3XXX4XXX which blocks → SOUTHWESTERN BELL 9533 SWEETWATER TX
— 325-239 not yet reported which blocks → CENTRAL TEXAS TEL. COOP., INC. 2052 VOCA TX
— 325-243 not yet reported which blocks → CENTRAL TEXAS TEL. COOP., INC. 2052 ROCHELLE TX
— 325-245 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 SAN ANGELO TX
— 325-247 0XXX which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 LLANO TX
— 325-248 1XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 LLANO TX
— 325-250 not yet reported which blocks → TEXAS COMMUNICATIONS, INC. 6820 STAMFORD TX
— 325-251 not yet reported which blocks → HILL COUNTRY TEL. COOP., INC. 2086 PONTOTOC TX
— 325-254 not yet reported which blocks → TX
— 325-255 0XXX1XXX3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 CHRISTOVAL TX
— 325-257 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JUNCTION TX
— 325-258 not yet reported which blocks → HILL COUNTRY TEL. COOP., INC. 2086 KATEMCY TX
— 325-259 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OZONA TX
— 325-260 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ABILENE TX
— 325-265 not yet reported which blocks → HILL COUNTRY TEL. COOP., INC. 2086 STREETER TX
— 325-271 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ABILENE TX

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.