NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

0 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, all time — NPA 737
INVOXIO INCORPORATED 19
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
2018-07-12 737-973-9XXX 9000–9999Assigned INVOXIO INCORPORATED 158H BRIGGS TX
2018-07-09 737-980-0XXX 0000–0999Assigned INVOXIO INCORPORATED 158H COUPLAND TX
2018-07-05 737-216-6XXX 6000–6999Assigned INVOXIO INCORPORATED 158H TAYLOR TX
2018-07-05 737-225-0XXX 0000–0999Assigned INVOXIO INCORPORATED 158H ROCKDALE TX
2018-07-05 737-227-2XXX 2000–2999Assigned INVOXIO INCORPORATED 158H WIMBERLEY TX
2018-07-05 737-233-3XXX 3000–3999Assigned INVOXIO INCORPORATED 158H ELGIN TX
2018-07-05 737-234-4XXX 4000–4999Assigned INVOXIO INCORPORATED 158H JARRELL TX
2018-07-05 737-245-9XXX 9000–9999Assigned INVOXIO INCORPORATED 158H GEORGETOWN TX
2018-07-05 737-248-9XXX 9000–9999Assigned INVOXIO INCORPORATED 158H KYLE TX
2018-07-05 737-250-5XXX 5000–5999Assigned INVOXIO INCORPORATED 158H MARTINDALE TX
2018-07-05 737-260-9XXX 9000–9999Assigned INVOXIO INCORPORATED 158H DRIPPNGSPG TX
2018-07-05 737-299-9XXX 9000–9999Assigned INVOXIO INCORPORATED 158H LAMPASAS TX
2018-07-05 737-302-0XXX 0000–0999Assigned INVOXIO INCORPORATED 158H SMITHVILLE TX
2018-07-05 737-702-9XXX 9000–9999Assigned INVOXIO INCORPORATED 158H GRANGER TX
2018-07-05 737-757-5XXX 5000–5999Assigned INVOXIO INCORPORATED 158H LEANDER TX
2018-07-03 737-770-0XXX 0000–0999Assigned INVOXIO INCORPORATED 158H BUDA TX
2018-06-29 737-747-5XXX 5000–5999Assigned INVOXIO INCORPORATED 158H BURNET TX
2018-06-29 737-881-6XXX 6000–6999Assigned INVOXIO INCORPORATED 158H BASTROP TX
2018-05-23 737-990-0XXX 0000–0999Assigned INVOXIO INCORPORATED 158H AUSTIN 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.