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
2022-02-18 945-362 1XXX2XXX6XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CELINA TX
2022-02-17 945-248 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 MCKINNEY TX
2022-02-09 945-446 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CARROLLTON TX
2022-02-01 945-667 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H ROCKWALL TX
2022-02-01 945-732 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H FRISCO TX
2022-01-27 945-786 0XXX1XXX2XXX3XXX4XXX7XXX · 4 holders which blocks → FRACTEL, LLC 965H ENNIS TX
2022-01-27 945-842 5XXX which blocks → FRACTEL, LLC 965H DLFTWTARPT TX
2022-01-27 945-946 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H TERRELL TX
2022-01-26 945-243 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 GRANDPRARI TX
2022-01-26 945-244 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 GRANDPRARI TX
2022-01-26 945-246 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 GRANDPRARI TX
2022-01-26 945-247 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 GRANDPRARI TX
2022-01-26 945-599 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J TERRELL TX
2022-01-25 945-867 0–9 XXXall 10 · 5 holders which blocks → COMMIO, LLC 939H PLANO TX
2022-01-24 945-242 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F FORNEY TX
2022-01-19 945-240 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 MIDLOTHIAN TX
2022-01-19 945-241 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 FRISCO TX
2022-01-17 945-239 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANDPRARI TX
2022-01-10 945-426 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J PLANO TX
2022-01-10 945-435 0–9 XXXall 10 · 7 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ENNIS TX
2022-01-10 945-527 0–9 XXXall 10 · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MCKINNEY TX
2022-01-10 945-536 0–9 XXXall 10 · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J GRANDPRARI TX
2022-01-10 945-546 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ROCKWALL TX
2022-01-07 945-322 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J DE SOTO TX
2022-01-07 945-837 0XXX4XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J DLFTWTARPT TX
2021-12-22 945-237 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J MCKINNEY TX
2021-12-22 945-238 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J TERRELL TX
2021-11-17 945-236 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 ROCKWALL TX
2021-11-11 945-235 0–9 XXXall 10 · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J DALLAS TX
2021-11-05 945-232 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 GRANDPRARI TX
2021-11-05 945-233 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 GRANDPRARI TX
2021-11-03 945-231 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F SEAGOVILLE TX
2021-11-02 945-230 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANDPRARI TX
2021-11-01 945-229 0–9 XXXall 10 · 6 holders which blocks → CALLWORKS CORPORATION 475J DALLAS TX
2021-10-28 945-228 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F CEDAR HILL TX
2021-10-26 945-227 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PLANO TX
2021-10-19 945-226 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 RED OAK TX
2021-09-30 945-225 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 GRANDPRARI TX
2021-09-29 945-224 0–9 XXXall 10 · 5 holders which blocks → AT&T - LOCAL 7421 MCKINNEY TX
2021-09-24 945-223 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CARROLLTON TX
2021-09-14 945-219 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C DALLAS TX
2021-09-13 945-220 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MCKINNEY TX
2021-09-07 945-455 0–9 XXXall 10 · 5 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J IRVING TX
2021-08-31 945-218 0–9 XXXall 10 · 4 holders which blocks → LEAP TELECOM, LLC 616J DALLAS TX
2021-08-24 945-215 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C ALLEN TX
2021-08-24 945-216 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 FRISCO TX
2021-08-24 945-217 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 FRISCO TX
2021-08-17 945-213 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FRISCO TX
2021-08-17 945-214 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANDPRARI TX
2021-08-13 945-210 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 GRANDPRARI 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.