NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

0 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, all time — NPA 734
MICHIGAN BELL TEL CO 66
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
2019-10-31 734-350-0XXX 0000–0999Assigned MICHIGAN BELL TEL CO 9323 YPSILANTI MI
2019-10-31 734-350-1XXX 1000–1999Assigned MICHIGAN BELL TEL CO 9323 YPSILANTI MI
2019-10-31 734-350-2XXX 2000–2999Assigned MICHIGAN BELL TEL CO 9323 YPSILANTI MI
2019-10-31 734-350-3XXX 3000–3999Assigned MICHIGAN BELL TEL CO 9323 YPSILANTI MI
2019-10-31 734-350-4XXX 4000–4999Assigned MICHIGAN BELL TEL CO 9323 YPSILANTI MI
2019-10-31 734-350-5XXX 5000–5999Assigned MICHIGAN BELL TEL CO 9323 YPSILANTI MI
2019-10-31 734-350-6XXX 6000–6999Assigned MICHIGAN BELL TEL CO 9323 YPSILANTI MI
2019-10-31 734-350-7XXX 7000–7999Assigned MICHIGAN BELL TEL CO 9323 YPSILANTI MI
2019-10-31 734-350-8XXX 8000–8999Assigned MICHIGAN BELL TEL CO 9323 YPSILANTI MI
2019-10-31 734-350-9XXX 9000–9999Assigned MICHIGAN BELL TEL CO 9323 YPSILANTI MI
2019-10-31 734-601-5XXX 5000–5999Assigned MICHIGAN BELL TEL CO 9323 LIVONIA MI
2019-10-31 734-601-6XXX 6000–6999Assigned MICHIGAN BELL TEL CO 9323 LIVONIA MI
2019-10-31 734-601-7XXX 7000–7999Assigned MICHIGAN BELL TEL CO 9323 LIVONIA MI
2019-10-31 734-601-8XXX 8000–8999Assigned MICHIGAN BELL TEL CO 9323 LIVONIA MI
2019-10-31 734-601-9XXX 9000–9999Assigned MICHIGAN BELL TEL CO 9323 LIVONIA MI
2015-10-15 734-779-7XXX 7000–7999Assigned MICHIGAN BELL TEL CO 9323 LIVONIA MI
2015-09-08 734-921-5XXX 5000–5999Assigned MICHIGAN BELL TEL CO 9323 ROMULUS MI
2015-09-08 734-921-6XXX 6000–6999Assigned MICHIGAN BELL TEL CO 9323 ROMULUS MI
2015-09-08 734-921-7XXX 7000–7999Assigned MICHIGAN BELL TEL CO 9323 ROMULUS MI
2015-09-08 734-921-8XXX 8000–8999Assigned MICHIGAN BELL TEL CO 9323 ROMULUS MI
2015-09-08 734-921-9XXX 9000–9999Assigned MICHIGAN BELL TEL CO 9323 ROMULUS MI
2013-07-19 734-221-1XXX 1000–1999Assigned MICHIGAN BELL TEL CO 9323 YPSILANTI MI
2013-07-19 734-221-2XXX 2000–2999Assigned MICHIGAN BELL TEL CO 9323 YPSILANTI MI
2010-12-28 734-707-2XXX 2000–2999Assigned MICHIGAN BELL TEL CO 9323 ANN ARBOR MI
2010-02-25 734-331-1XXX 1000–1999Assigned MICHIGAN BELL TEL CO 9323 WAYNE MI
2007-07-12 734-695-2XXX 2000–2999Assigned MICHIGAN BELL TEL CO 9323 YPSILANTI MI
2007-07-12 734-695-3XXX 3000–3999Assigned MICHIGAN BELL TEL CO 9323 YPSILANTI MI
2007-07-12 734-695-4XXX 4000–4999Assigned MICHIGAN BELL TEL CO 9323 YPSILANTI MI
2007-07-12 734-695-5XXX 5000–5999Assigned MICHIGAN BELL TEL CO 9323 YPSILANTI MI
2007-07-12 734-695-6XXX 6000–6999Assigned MICHIGAN BELL TEL CO 9323 YPSILANTI MI
2007-01-22 734-619-5XXX 5000–5999Assigned MICHIGAN BELL TEL CO 9323 ANN ARBOR MI
2006-12-12 734-979-5XXX 5000–5999Assigned MICHIGAN BELL TEL CO 9323 PLYMOUTH MI
2006-12-01 734-979-2XXX 2000–2999Assigned MICHIGAN BELL TEL CO 9323 PLYMOUTH MI
2006-12-01 734-979-3XXX 3000–3999Assigned MICHIGAN BELL TEL CO 9323 PLYMOUTH MI
2006-12-01 734-979-4XXX 4000–4999Assigned MICHIGAN BELL TEL CO 9323 PLYMOUTH MI
2006-11-13 734-619-3XXX 3000–3999Assigned MICHIGAN BELL TEL CO 9323 ANN ARBOR MI
2006-11-13 734-619-4XXX 4000–4999Assigned MICHIGAN BELL TEL CO 9323 ANN ARBOR MI
2006-09-13 734-845-3XXX 3000–3999Assigned MICHIGAN BELL TEL CO 9323 ANN ARBOR MI
2006-09-13 734-845-5XXX 5000–5999Assigned MICHIGAN BELL TEL CO 9323 ANN ARBOR MI
2005-12-14 734-386-2XXX 2000–2999Assigned MICHIGAN BELL TEL CO 9323 PLYMOUTH MI
2005-12-14 734-386-3XXX 3000–3999Assigned MICHIGAN BELL TEL CO 9323 PLYMOUTH MI
2005-12-14 734-386-4XXX 4000–4999Assigned MICHIGAN BELL TEL CO 9323 PLYMOUTH MI
2005-12-14 734-386-5XXX 5000–5999Assigned MICHIGAN BELL TEL CO 9323 PLYMOUTH MI
2005-10-18 734-759-5XXX 5000–5999Assigned MICHIGAN BELL TEL CO 9323 WYANDOTTE MI
2005-10-18 734-759-6XXX 6000–6999Assigned MICHIGAN BELL TEL CO 9323 WYANDOTTE MI
2004-06-01 734-232-0XXX 0000–0999Assigned MICHIGAN BELL TEL CO 9323 ANN ARBOR MI
2004-06-01 734-232-1XXX 1000–1999Assigned MICHIGAN BELL TEL CO 9323 ANN ARBOR MI
2004-06-01 734-232-2XXX 2000–2999Assigned MICHIGAN BELL TEL CO 9323 ANN ARBOR MI
2004-06-01 734-232-3XXX 3000–3999Assigned MICHIGAN BELL TEL CO 9323 ANN ARBOR MI
2004-06-01 734-232-4XXX 4000–4999Assigned MICHIGAN BELL TEL CO 9323 ANN ARBOR MI

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.