NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

3 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, last 30 days — NPA 734
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 1
EXIANT COMMUNICATIONS LLC 1
AHOI 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
2013-09-06 734-389-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 ANN ARBOR MI
2013-09-05 734-249-7XXX 7000–7999Assigned CLEAR RATE COMMUNICATIONS, LLC 046L ANN ARBOR MI
2013-08-23 734-927-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PLYMOUTH MI
2013-08-23 734-992-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E ROMULUS MI
2013-08-09 734-431-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 WAYNE MI
2013-08-09 734-431-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 WAYNE MI
2013-07-23 734-738-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J PLYMOUTH 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
2013-07-12 734-589-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J WAYNE MI
2013-07-10 734-357-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 PLYMOUTH MI
2013-07-10 734-357-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 PLYMOUTH MI
2013-07-10 734-357-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 PLYMOUTH MI
2013-07-10 734-357-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 PLYMOUTH MI
2013-07-10 734-357-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 PLYMOUTH MI
2013-07-10 734-357-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 PLYMOUTH MI
2013-07-10 734-392-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 PLYMOUTH MI
2013-07-10 734-392-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 PLYMOUTH MI
2013-07-10 734-392-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 PLYMOUTH MI
2013-07-10 734-392-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 PLYMOUTH MI
2013-07-10 734-392-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 PLYMOUTH MI
2013-07-10 734-392-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 PLYMOUTH MI
2013-07-10 734-414-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 PLYMOUTH MI
2013-07-10 734-456-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 PLYMOUTH MI
2013-07-10 734-456-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 PLYMOUTH MI
2013-07-10 734-461-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 WILLIS MI
2013-07-10 734-461-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 WILLIS MI
2013-07-10 734-461-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 WILLIS MI
2013-07-10 734-461-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 WILLIS MI
2013-07-10 734-554-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 WILLIS MI
2013-07-10 734-554-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 WILLIS MI
2013-07-10 734-554-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 WILLIS MI
2013-07-10 734-567-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 WILLIS MI
2013-07-10 734-588-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 WILLIS MI
2013-07-10 734-588-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 WILLIS MI
2013-07-10 734-784-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROMULUS MI
2013-07-10 734-784-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROMULUS MI
2013-07-10 734-784-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROMULUS MI
2013-07-10 734-840-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROMULUS MI
2013-07-10 734-840-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROMULUS MI
2013-07-10 734-857-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROMULUS MI
2013-07-10 734-857-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROMULUS MI
2013-07-10 734-857-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROMULUS MI
2013-07-10 734-857-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROMULUS MI
2013-07-10 734-857-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROMULUS MI
2013-07-02 734-374-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C WYANDOTTE MI
2013-07-01 734-430-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E MONROE MI
2013-07-01 734-655-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E LIVONIA MI
2013-06-14 734-258-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 WYANDOTTE MI
2013-06-14 734-431-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 WAYNE MI

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.