NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 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, all time — NPA 325
FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 61
SOUTHWESTERN BELL 39
NEW CINGULAR WIRELESS PCS, LLC - IL 35
ONVOY, LLC - TX 32
24
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
2001-06-27 325-430 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 BROWNWOOD TX
2001-05-30 325-214 none assigned yet which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 VALERA TX
2001-05-14 325-715 1XXX2XXX7XXX8XXX9XXX · 2 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 TOW TX
2001-03-14 325-936 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → SOUTHWESTERN BELL 9533 ROSCOE TX
2001-02-20 325-956 3XXX6XXX7XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 KINGSLAND TX
2001-02-12 325-895 2XXX3XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 SAN ANGELO TX
2001-01-03 325-518 none assigned yet which blocks → METROPCS, INC. 5562 ABILENE TX
— 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
— 325-277 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 SAN ANGELO TX
— 325-278 not yet reported which blocks → TEXAS COMMUNICATIONS, INC. 6820 SAN ANGELO TX
— 325-279 not yet reported which blocks → TEXAS COMMUNICATIONS, INC. 6820 SAN ANGELO TX
— 325-281 not yet reported which blocks → TX
— 325-282 not yet reported which blocks → VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW 1163 BLACKWELL TX
— 325-284 2XXX3XXX4XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SAN ANGELO TX
— 325-286 not yet reported which blocks → CENTRAL TEXAS TEL. COOP., INC. 2052 MELVIN TX
— 325-288 not yet reported which blocks → ALENCO COMMUNICATIONS, INC. 2090 MARYNEAL TX
— 325-303 not yet reported which blocks → SOUTHWESTERN BELL 9533 XXXXXXXXXX TX
— 325-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TX
— 325-321 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 7 holders which blocks → METROPCS, INC. 5562 COMANCHE TX
— 325-323 0–9 XXXall 10 · 6 holders which blocks → TELNYX LLC 073H BIG LAKE TX
— 325-325 not yet reported which blocks → TX
— 325-328 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 3 holders which blocks → TELNYX LLC 073H WATER VLY 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.