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
2001-01-29 512-782-3XXX 3000–3999Assigned SOUTHWESTERN BELL 9533 AUSTIN TX
2001-01-29 512-782-5XXX 5000–5999Assigned SOUTHWESTERN BELL 9533 AUSTIN TX
2001-01-29 512-782-6XXX 6000–6999Assigned SOUTHWESTERN BELL 9533 AUSTIN TX
2001-01-29 512-782-7XXX 7000–7999Assigned SOUTHWESTERN BELL 9533 AUSTIN TX
2000-10-16 512-670-5XXX 5000–5999Assigned SOUTHWESTERN BELL 9533 AUSTIN TX
2000-09-15 512-854-0XXX 0000–0999Assigned SOUTHWESTERN BELL 9533 AUSTIN TX
2000-09-15 512-854-1XXX 1000–1999Assigned SOUTHWESTERN BELL 9533 AUSTIN TX
2000-09-15 512-854-2XXX 2000–2999Assigned SOUTHWESTERN BELL 9533 AUSTIN TX
2000-09-15 512-854-3XXX 3000–3999Assigned SOUTHWESTERN BELL 9533 AUSTIN TX
2000-09-15 512-854-4XXX 4000–4999Assigned SOUTHWESTERN BELL 9533 AUSTIN TX
2000-09-15 512-854-5XXX 5000–5999Assigned SOUTHWESTERN BELL 9533 AUSTIN TX
2000-09-15 512-854-6XXX 6000–6999Assigned SOUTHWESTERN BELL 9533 AUSTIN TX
2000-09-15 512-854-7XXX 7000–7999Assigned SOUTHWESTERN BELL 9533 AUSTIN TX
2000-09-15 512-854-8XXX 8000–8999Assigned SOUTHWESTERN BELL 9533 AUSTIN TX
2000-09-15 512-854-9XXX 9000–9999Assigned SOUTHWESTERN BELL 9533 AUSTIN TX
2000-09-14 512-247-6XXX 6000–6999Assigned SOUTHWESTERN BELL 9533 AUSTIN TX
2000-09-14 512-670-0XXX 0000–0999Assigned SOUTHWESTERN BELL 9533 AUSTIN TX
2000-09-14 512-670-2XXX 2000–2999Assigned SOUTHWESTERN BELL 9533 AUSTIN TX
2000-09-14 512-670-7XXX 7000–7999Assigned SOUTHWESTERN BELL 9533 AUSTIN TX
2000-09-14 512-828-4XXX 4000–4999Assigned SOUTHWESTERN BELL 9533 AUSTIN TX
2000-09-14 512-828-5XXX 5000–5999Assigned SOUTHWESTERN BELL 9533 AUSTIN TX
2000-09-06 512-225-1XXX 1000–1999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2000-09-06 512-225-7XXX 7000–7999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2000-09-06 512-334-1XXX 1000–1999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2000-09-06 512-334-4XXX 4000–4999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2000-09-06 512-439-1XXX 1000–1999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2000-07-25 512-334-6XXX 6000–6999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2000-07-25 512-334-7XXX 7000–7999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2000-07-25 512-439-6XXX 6000–6999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2000-07-25 512-439-7XXX 7000–7999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2000-07-24 512-334-2XXX 2000–2999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2000-07-24 512-439-2XXX 2000–2999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2000-07-24 512-439-3XXX 3000–3999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 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.