NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

338 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
8X8, INC. 38
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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
— 254-207 0XXX which blocks → SOUTHWESTERN BELL 9533 TEMPLE TX
— 254-208 not yet reported which blocks → HELMSCO, INC. 6833 MERIDIAN TX
— 254-209 not yet reported which blocks → HELMSCO, INC. 6833 HUBBARD TX
— 254-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TX
— 254-213 5XXX6XXX7XXX8XXX · 2 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K KILLEEN TX
— 254-214 7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 WACO TX
— 254-217 8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 TEMPLE TX
— 254-218 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C WACO TX
— 254-222 not yet reported which blocks → HELMSCO, INC. 6833 HILLSBORO TX
— 254-223 5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GATESVILLE TX
— 254-224 1XXX2XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → AT&T - LOCAL 7421 WACO TX
— 254-228 2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → GRANDE COMMUNICATIONS NETWORKS, INC. - TX 7670 TEMPLE TX
— 254-234 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BREMOND TX
— 254-235 not yet reported which blocks → GRANDE COMMUNICATIONS NETWORKS, INC. - TX 7670 WACO TX
— 254-236 0–9 XXXall 10 · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K MCGREGOR TX
— 254-248 8XXX9XXX · 2 holders which blocks → BRIGHTSPEED OF EASTERN TEXAS, INC. 2084 GATESVILLE TX
— 254-249 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K HOLLAND TX
— 254-250 not yet reported which blocks → HELMSCO, INC. 6833 TEMPLE TX
— 254-259 6XXX which blocks → VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW 1181 MAY TX
— 254-260 not yet reported which blocks → HELMSCO, INC. 6833 WACO TX
— 254-262 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 WACO TX
— 254-267 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - TX 903C RANGER TX
— 254-277 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K MOFFAT TX
— 254-285 1XXX4XXX7XXX8XXX9XXX · 2 holders which blocks → BRIGHTSPEED OF TEXAS, INC. 2114 KILLEEN TX
— 254-286 not yet reported which blocks → BRIGHTSPEED OF TEXAS, INC. 2114 KILLEEN TX
— 254-287 not yet reported which blocks → BRIGHTSPEED OF TEXAS, INC. 2114 FORT HOOD TX
— 254-288 not yet reported which blocks → BRIGHTSPEED OF TEXAS, INC. 2114 FORT HOOD TX
— 254-289 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KILLEEN TX
— 254-290 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 KILLEEN TX
— 254-291 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KILLEEN TX
— 254-292 0XXX2XXX3XXX8XXX9XXX which blocks → SOUTHWESTERN BELL 9533 WACO TX
— 254-295 0XXX1XXX3XXX6XXX7XXX9XXX · 5 holders which blocks → SOUTHWESTERN BELL 9533 TEMPLE TX
— 254-296 1XXX4XXX8XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 WACO TX
— 254-297 9XXX which blocks → SOUTHWESTERN BELL 9533 WACO TX
— 254-298 9XXX which blocks → SOUTHWESTERN BELL 9533 TEMPLE TX
— 254-299 3XXX5XXX7XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 WACO TX
— 254-303 not yet reported which blocks → HELMSCO, INC. 6833 TEAGUE TX
— 254-305 not yet reported which blocks → BRIGHTSPEED OF TEXAS, INC. 2114 KILLEEN TX
— 254-309 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J ROSEBUD TX
— 254-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TX
— 254-323 0–9 XXXall 10 · 3 holders which blocks → TELNYX LLC 073H EDDY TX
— 254-333 not yet reported which blocks → HELMSCO, INC. 6833 KILLEEN TX
— 254-334 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 EASTLAND TX
— 254-336 0–9 XXXwhole prefix which blocks → BRIGHTSPEED OF TEXAS, INC. 2114 KILLEEN TX
— 254-337 2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → METROPCS, INC. 5562 HILLSBORO TX
— 254-338 none assigned yet which blocks → T-MOBILE USA, INC. 6529 KILLEEN TX
— 254-344 0XXX which blocks → WINDSTREAM SUGAR LAND, LLC 2147 PRAIRIE HL TX
— 254-352 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 STEPHENVL TX
— 254-353 none assigned yet which blocks → WINDSTREAM SUGAR LAND, LLC 2147 SANDY TX
— 254-355 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - TX 903C MEXIA 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.