NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

36 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 346
ONVOY, LLC - TX 21
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 9
PAETEC ITEL, LLC 2
BANDWIDTH.COM CLEC, LLC - TX 2
TELNYX 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
2014-02-27 346-728-3XXX 3000–3999Assigned SOUTHWESTERN BELL 9533 HOUSTON TX
2014-02-27 346-728-4XXX 4000–4999Assigned SOUTHWESTERN BELL 9533 HOUSTON TX
2014-02-27 346-728-5XXX 5000–5999Assigned SOUTHWESTERN BELL 9533 HOUSTON TX
2014-02-27 346-728-6XXX 6000–6999Assigned SOUTHWESTERN BELL 9533 HOUSTON TX
2014-02-27 346-728-7XXX 7000–7999Assigned SOUTHWESTERN BELL 9533 HOUSTON TX
2014-02-27 346-728-8XXX 8000–8999Assigned SOUTHWESTERN BELL 9533 HOUSTON TX
2014-02-27 346-728-9XXX 9000–9999Assigned SOUTHWESTERN BELL 9533 HOUSTON TX
2014-02-27 346-729-0XXX 0000–0999Assigned SOUTHWESTERN BELL 9533 HOUSTON TX
2014-02-27 346-729-1XXX 1000–1999Assigned SOUTHWESTERN BELL 9533 HOUSTON TX
2014-02-27 346-729-2XXX 2000–2999Assigned SOUTHWESTERN BELL 9533 HOUSTON TX
2014-02-27 346-729-3XXX 3000–3999Assigned SOUTHWESTERN BELL 9533 HOUSTON TX
2014-02-27 346-729-4XXX 4000–4999Assigned SOUTHWESTERN BELL 9533 HOUSTON TX
2014-02-27 346-729-5XXX 5000–5999Assigned SOUTHWESTERN BELL 9533 HOUSTON TX
2014-02-27 346-729-6XXX 6000–6999Assigned SOUTHWESTERN BELL 9533 HOUSTON TX
2014-02-27 346-729-7XXX 7000–7999Assigned SOUTHWESTERN BELL 9533 HOUSTON TX
2014-02-27 346-729-8XXX 8000–8999Assigned SOUTHWESTERN BELL 9533 HOUSTON TX
2014-02-27 346-729-9XXX 9000–9999Assigned SOUTHWESTERN BELL 9533 HOUSTON TX
2014-02-27 346-834-0XXX 0000–0999Assigned SOUTHWESTERN BELL 9533 HOUSTON TX
2014-02-27 346-834-1XXX 1000–1999Assigned SOUTHWESTERN BELL 9533 HOUSTON TX
2014-02-27 346-834-2XXX 2000–2999Assigned SOUTHWESTERN BELL 9533 HOUSTON TX
2014-02-27 346-834-3XXX 3000–3999Assigned SOUTHWESTERN BELL 9533 HOUSTON TX
2014-02-27 346-834-4XXX 4000–4999Assigned SOUTHWESTERN BELL 9533 HOUSTON TX
2014-02-27 346-834-5XXX 5000–5999Assigned SOUTHWESTERN BELL 9533 HOUSTON TX
2014-02-27 346-834-6XXX 6000–6999Assigned SOUTHWESTERN BELL 9533 HOUSTON TX
2014-02-27 346-834-7XXX 7000–7999Assigned SOUTHWESTERN BELL 9533 HOUSTON TX
2014-02-27 346-834-8XXX 8000–8999Assigned SOUTHWESTERN BELL 9533 HOUSTON TX
2014-02-27 346-834-9XXX 9000–9999Assigned SOUTHWESTERN BELL 9533 HOUSTON TX
2014-02-03 346-247-7XXX 7000–7999Assigned ONVOY, LLC - TX 903C HOUSTON TX
2014-01-16 346-222-2XXX 2000–2999Assigned FOREMOST TELECOMMUNICATIONS CORPORATION - TX 319D LA PORTE TX
2014-01-16 346-333-3XXX 3000–3999Assigned FOREMOST TELECOMMUNICATIONS CORPORATION - TX 319D LANGHAMCRK TX
2014-01-16 346-444-4XXX 4000–4999Assigned FOREMOST TELECOMMUNICATIONS CORPORATION - TX 319D HOUSTON TX
2014-01-16 346-777-7XXX 7000–7999Assigned FOREMOST TELECOMMUNICATIONS CORPORATION - TX 319D BAMMEL TX
2014-01-16 346-888-8XXX 8000–8999Assigned FOREMOST TELECOMMUNICATIONS CORPORATION - TX 319D HSTNSUBURB TX
2014-01-16 346-999-9XXX 9000–9999Assigned FOREMOST TELECOMMUNICATIONS CORPORATION - TX 319D HUFFMAN 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.