NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 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, all time — NPA 979
SOUTHWESTERN BELL 59
FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 54
NEW CINGULAR WIRELESS PCS, LLC - IL 47
LEVEL 3 COMMUNICATIONS, LLC - TX 30
AERIAL COMMUNICATIONS, INC. 29
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
— 979-217 0XXX1XXX2XXX3XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 WALLIS TX
— 979-218 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 BRYAN TX
— 979-219 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 BRYAN TX
— 979-220 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 BRYAN TX
— 979-221 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HEMPSTEAD TX
— 979-222 not yet reported which blocks → TEXAS COMMUNICATIONS, INC. 6820 BRYAN TX
— 979-223 not yet reported which blocks → SPOK, INC. 6630 BRYAN TX
— 979-224 none assigned yet which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BRYAN TX
— 979-226 not yet reported which blocks → SPOK, INC. 6630 BRYAN TX
— 979-227 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → GRANDE COMMUNICATIONS NETWORKS, INC. - TX 7670 BELLVILLE TX
— 979-228 not yet reported which blocks → SPOK, INC. 6630 BRYAN TX
— 979-229 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BRYAN TX
— 979-230 1XXX8XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 FREEPORT TX
— 979-233 not yet reported which blocks → SOUTHWESTERN BELL 9533 FREEPORT TX
— 979-234 0XXX4XXX8XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 EAGLE LAKE TX
— 979-235 not yet reported which blocks → SOUTHWESTERN BELL 9533 FREEPORT TX
— 979-236 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FREEPORT TX
— 979-237 not yet reported which blocks → SOUTHWESTERN BELL 9533 FREEPORT TX
— 979-238 not yet reported which blocks → SOUTHWESTERN BELL 9533 FREEPORT TX
— 979-239 not yet reported which blocks → SOUTHWESTERN BELL 9533 FREEPORT TX
— 979-240 1XXX6XXX7XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 BAY CITY TX
— 979-241 none assigned yet which blocks → SOUTHWESTERN BELL 9533 BAY CITY TX
— 979-242 not yet reported which blocks → COLORADO VALLEY TEL. COOP., INC. 2059 PLUM TX
— 979-244 0XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 BAY CITY TX
— 979-245 not yet reported which blocks → SOUTHWESTERN BELL 9533 BAY CITY TX
— 979-247 not yet reported which blocks → COLORADO VALLEY TEL. COOP., INC. 2059 HOSTYN TX
— 979-249 none assigned yet which blocks → COLORADO VALLEY TEL. COOP., INC. 2059 WARRENTON TX
— 979-251 not yet reported which blocks → SOUTHWESTERN BELL 9533 BRENHAM TX
— 979-254 not yet reported which blocks → TEXAS COMMUNICATIONS, INC. 6820 FRANKLIN TX
— 979-255 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BRYAN TX
— 979-259 not yet reported which blocks → SOUTHWESTERN BELL 9533 XXXXXXXXXX TX
— 979-260 not yet reported which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 BRYAN TX
— 979-263 none assigned yet which blocks → COLORADO VALLEY TEL. COOP., INC. 2059 BORDEN TX
— 979-265 not yet reported which blocks → SOUTHWESTERN BELL 9533 CLTLKJCKSN TX
— 979-266 0XXX6XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 CLTLKJCKSN TX
— 979-268 not yet reported which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 BRYAN TX
— 979-272 4XXX5XXX6XXX · 2 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 SNOOKTUNIS TX
— 979-277 not yet reported which blocks → SOUTHWESTERN BELL 9533 BRENHAM TX
— 979-278 not yet reported which blocks → INDUSTRY TEL. CO. 2093 CARMINE TX
— 979-279 0XXX7XXX8XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 HEARNE TX
— 979-280 2XXX3XXX4XXX6XXX8XXX9XXX · 5 holders which blocks → SOUTHWESTERN BELL 9533 HEARNE TX
— 979-281 not yet reported which blocks → TX
— 979-282 0XXX3XXX4XXX5XXX7XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 WHARTON TX
— 979-285 none assigned yet which blocks → SOUTHWESTERN BELL 9533 CLTLKJCKSN TX
— 979-289 1XXX6XXX7XXX8XXX · 3 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 2154 BURTON TX
— 979-291 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F ANGLETON TX
— 979-292 7XXX8XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 CLTLKJCKSN TX
— 979-297 not yet reported which blocks → SOUTHWESTERN BELL 9533 CLTLKJCKSN TX
— 979-299 none assigned yet which blocks → SOUTHWESTERN BELL 9533 CLTLKJCKSN TX
— 979-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX 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.