NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

4 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 — NPA 945
TELEPORT COMMUNICATIONS AMERICA, LLC - TX 1
ONVOY, LLC - TX 1
NEW CINGULAR WIRELESS PCS, LLC - IL 1
8X8, INC. 1
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
2021-08-12 945-209 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 GRANDPRARI TX
2021-08-11 945-208 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 GRANDPRARI TX
2021-07-27 945-207 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - TX 903C PROSPER TX
2021-07-20 945-206 0XXX1XXX2XXX3XXX4XXX6XXX7XXX9XXX · 4 holders which blocks → ONVOY, LLC - TX 903C FARMERSVL TX
2021-07-06 945-212 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - TX 903C CEDAR HILL TX
2021-06-30 945-205 0XXX1XXX2XXX3XXX6XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F BLUE RIDGE TX
2021-06-21 945-202 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C NEVADA TX
2021-06-21 945-203 0XXX2XXX3XXX4XXX5XXX6XXX8XXX which blocks → ONVOY, LLC - TX 903C SCURRY TX
2021-06-18 945-201 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 GRANDPRARI TX
2021-06-10 945-255 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H ANNA TX
2021-06-10 945-355 3XXX5XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H BRISTOL TX
2021-05-19 945-468 0–9 XXXall 10 · 6 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J DALLAS TX
2021-05-07 945-699 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H MCKINNEY TX
2021-05-07 945-788 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H WILMER TX
2021-05-07 945-899 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H GRANDPRARI TX
2021-04-06 945-542 0–9 XXXall 10 · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J WAXAHACHIE TX
2021-04-02 945-204 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 PROSPER TX
2021-03-18 945-810 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C IRVING TX
2021-03-02 945-386 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H FORNEY TX
2021-03-02 945-758 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H ALLEN TX
2021-03-02 945-766 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H TERRELL TX
2021-01-22 945-745 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - TX 903C ROYSE CITY TX
2021-01-18 945-245 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - TX 903C MAYPEARL TX
2021-01-11 945-200 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H ENNIS TX
2021-01-11 945-234 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H MCKINNEY TX
2021-01-11 945-345 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H MIDLOTHIAN TX
2020-12-08 945-910 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C DALLAS TX
2020-11-27 945-336 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H GRANDPRARI TX
2020-11-27 945-348 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H FRISCO TX
2020-11-27 945-356 0XXX1XXX2XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H DLFTWTARPT TX
2020-11-27 945-465 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 7 holders which blocks → FRACTEL, LLC 965H COMBINE TX
2020-11-27 945-529 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H VENUS TX
2020-11-27 945-600 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → FRACTEL, LLC 965H CELINA TX
2020-11-19 945-222 0–9 XXXall 10 · 5 holders which blocks → USFON, INC. - TX 473F CRANDALL TX
2020-11-19 945-300 0–9 XXXall 10 · 4 holders which blocks → USFON, INC. - TX 473F LEWISVILLE TX
2020-11-19 945-333 0–9 XXXall 10 · 2 holders which blocks → USFON, INC. - TX 473F MCKINNEY TX
2020-11-19 945-400 0–9 XXXall 10 · 3 holders which blocks → USFON, INC. - TX 473F FRISCO TX
2020-11-19 945-444 0–9 XXXall 10 · 2 holders which blocks → USFON, INC. - TX 473F GRANDPRARI TX
2020-11-19 945-500 0–9 XXXall 10 · 6 holders which blocks → USFON, INC. - TX 473F CARROLLTON TX
2020-11-19 945-666 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → USFON, INC. - TX 473F PALMER TX
2020-11-19 945-800 0–9 XXXall 10 · 4 holders which blocks → USFON, INC. - TX 473F PLANO TX
2020-11-19 945-900 0–9 XXXall 10 · 5 holders which blocks → USFON, INC. - TX 473F WAXAHACHIE TX
2020-11-17 945-777 0–9 XXXall 10 · 6 holders which blocks → TERRA NOVA TELECOM INC. 145J ANNA TX
2020-11-17 945-888 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TERRA NOVA TELECOM INC. 145J BLUE RIDGE TX
2020-11-17 945-999 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TERRA NOVA TELECOM INC. 145J BRISTOL TX
— 945-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TX
— 945-221 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 DALLAS TX
— 945-291 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 FRISCO TX
— 945-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TX
— 945-411 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.