NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

1 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, last 30 days — NPA 972
NEW CINGULAR WIRELESS PCS, LLC - IL 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 thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2017-05-31 972-433-0XXX 0000–0999Assigned TELNYX LLC 073H PROSPER TX
2017-05-25 972-324-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 FRISCO TX
2017-05-22 972-433-1XXX 1000–1999Assigned SOUTHWESTERN BELL 9533 PROSPER TX
2017-05-18 972-324-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 FRISCO TX
2017-05-11 972-903-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 WAXAHACHIE TX
2017-03-29 972-990-0XXX 0000–0999Assigned SOUTHWESTERN BELL TELEPHONE COMPANY - TX 7726 IRVING TX
2017-03-29 972-990-1XXX 1000–1999Assigned SOUTHWESTERN BELL TELEPHONE COMPANY - TX 7726 IRVING TX
2017-03-29 972-990-2XXX 2000–2999Assigned SOUTHWESTERN BELL TELEPHONE COMPANY - TX 7726 IRVING TX
2017-03-29 972-990-3XXX 3000–3999Assigned SOUTHWESTERN BELL TELEPHONE COMPANY - TX 7726 IRVING TX
2017-03-29 972-990-4XXX 4000–4999Assigned SOUTHWESTERN BELL TELEPHONE COMPANY - TX 7726 IRVING TX
2017-03-29 972-990-5XXX 5000–5999Assigned SOUTHWESTERN BELL TELEPHONE COMPANY - TX 7726 IRVING TX
2017-03-29 972-990-6XXX 6000–6999Assigned SOUTHWESTERN BELL TELEPHONE COMPANY - TX 7726 IRVING TX
2017-03-29 972-990-7XXX 7000–7999Assigned SOUTHWESTERN BELL TELEPHONE COMPANY - TX 7726 IRVING TX
2017-03-29 972-990-8XXX 8000–8999Assigned SOUTHWESTERN BELL TELEPHONE COMPANY - TX 7726 IRVING TX
2017-03-29 972-990-9XXX 9000–9999Assigned SOUTHWESTERN BELL TELEPHONE COMPANY - TX 7726 IRVING TX
2017-03-22 972-940-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 DALLAS TX
2017-03-22 972-940-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 DALLAS TX
2017-03-22 972-940-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 DALLAS TX
2017-03-22 972-940-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 DALLAS TX
2017-03-10 972-903-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 WAXAHACHIE TX
2017-03-10 972-903-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 WAXAHACHIE TX
2017-03-10 972-903-8XXX 8000–8999Assigned TELNYX LLC 073H WAXAHACHIE TX
2017-03-02 972-806-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 PLANO TX
2017-03-02 972-806-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 PLANO TX
2017-03-02 972-806-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 PLANO TX
2017-03-02 972-806-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 PLANO TX
2017-03-02 972-806-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 PLANO TX
2017-03-02 972-806-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 PLANO TX
2017-03-02 972-806-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 PLANO TX
2017-01-26 972-940-6XXX 6000–6999Assigned SOUTHWESTERN BELL 9533 DALLAS TX
2017-01-26 972-940-7XXX 7000–7999Assigned SOUTHWESTERN BELL 9533 DALLAS TX
2017-01-05 972-750-7XXX 7000–7999Assigned METROPCS, INC. 5562 TERRELL TX
2016-12-14 972-349-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J DALLAS TX
2016-12-12 972-348-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C DALLAS TX
2016-09-30 972-903-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WAXAHACHIE TX
2016-09-28 972-737-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ALLEN TX
2016-09-26 972-430-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 BLUE RIDGE TX
2016-09-13 972-946-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANDPRARI TX
2016-09-13 972-946-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANDPRARI TX
2016-09-13 972-946-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANDPRARI TX
2016-09-13 972-946-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANDPRARI TX
2016-09-02 972-214-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FRISCO TX
2016-09-02 972-214-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FRISCO TX
2016-09-02 972-817-2XXX 2000–2999Assigned SOUTHWESTERN BELL TELEPHONE COMPANY - TX 7726 IRVING TX
2016-09-02 972-817-3XXX 3000–3999Assigned SOUTHWESTERN BELL TELEPHONE COMPANY - TX 7726 IRVING TX
2016-09-02 972-817-4XXX 4000–4999Assigned SOUTHWESTERN BELL TELEPHONE COMPANY - TX 7726 IRVING TX
2016-09-02 972-817-5XXX 5000–5999Assigned SOUTHWESTERN BELL TELEPHONE COMPANY - TX 7726 IRVING TX
2016-09-02 972-817-6XXX 6000–6999Assigned SOUTHWESTERN BELL TELEPHONE COMPANY - TX 7726 IRVING TX
2016-09-02 972-817-7XXX 7000–7999Assigned SOUTHWESTERN BELL TELEPHONE COMPANY - TX 7726 IRVING TX
2016-09-02 972-817-8XXX 8000–8999Assigned SOUTHWESTERN BELL TELEPHONE COMPANY - TX 7726 IRVING TX

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.