NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

3 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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 512
HD CARRIER LLC 2
INTRADO COMMUNICATIONS, LLC 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
2003-12-19 512-300-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2003-12-18 512-228-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2003-12-17 512-519-1XXX 1000–1999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2003-12-17 512-519-2XXX 2000–2999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2003-12-17 512-519-4XXX 4000–4999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2003-12-17 512-519-7XXX 7000–7999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2003-12-17 512-519-8XXX 8000–8999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2003-12-17 512-597-2XXX 2000–2999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2003-12-17 512-597-3XXX 3000–3999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2003-12-17 512-597-4XXX 4000–4999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2003-12-17 512-597-7XXX 7000–7999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2003-12-17 512-597-8XXX 8000–8999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2003-12-17 512-597-9XXX 9000–9999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2003-12-10 512-285-8XXX 8000–8999Assigned ONVOY, LLC - TX 903C ELGIN TX
2003-12-10 512-772-8XXX 8000–8999Assigned ONVOY, LLC - TX 903C BASTROP TX
2003-12-04 512-456-2XXX 2000–2999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 LEANDER TX
2003-12-02 512-312-3XXX 3000–3999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 BUDA TX
2003-12-01 512-228-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2003-11-04 512-581-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BASTROP TX
2003-11-04 512-718-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BASTROP TX
2003-11-04 512-718-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BASTROP TX
2003-10-30 512-281-7XXX 7000–7999Assigned ONVOY, LLC - TX 903C ELGIN TX
2003-10-27 512-228-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2003-10-27 512-228-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2003-10-24 512-225-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2003-10-23 512-417-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2003-10-06 512-581-6XXX 6000–6999Assigned ONVOY, LLC - TX 903C BASTROP TX
2003-10-06 512-690-8XXX 8000–8999Assigned ONVOY, LLC - TX 903C LEANDER TX
2003-09-18 512-203-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2003-09-18 512-228-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2003-09-15 512-692-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2003-09-15 512-692-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2003-09-15 512-692-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2003-09-15 512-692-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2003-09-15 512-692-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2003-09-12 512-276-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 AUSTIN TX
2003-09-10 512-203-8XXX 8000–8999Assigned METROPCS, INC. 5562 AUSTIN TX
2003-09-10 512-652-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2003-09-02 512-690-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 LEANDER TX
2003-08-28 512-639-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 GEORGETOWN TX
2003-08-05 512-247-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2003-06-19 512-203-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2003-06-19 512-203-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2003-06-19 512-203-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2003-06-19 512-233-9XXX 9000–9999Assigned METROPCS, INC. 5562 AUSTIN TX
2003-06-10 512-553-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 BURNET TX
2003-05-28 512-281-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ELGIN TX
2003-05-16 512-233-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2003-04-18 512-203-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2003-04-18 512-203-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.