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
2016-08-03 734-228-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J PLYMOUTH MI
2016-08-02 734-767-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WYANDOTTE MI
2016-08-02 734-767-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WYANDOTTE MI
2016-08-01 734-767-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WYANDOTTE MI
2016-06-27 734-746-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C DUNDEE MI
2016-06-22 734-544-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E YPSILANTI MI
2016-06-21 734-228-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E PLYMOUTH MI
2016-06-21 734-366-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E WAYNE MI
2016-06-20 734-263-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E ANN ARBOR MI
2016-06-20 734-304-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E TRENTON MI
2016-06-20 734-666-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E LIVONIA MI
2016-06-20 734-767-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E WYANDOTTE MI
2016-06-17 734-742-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E LIVONIA MI
2016-06-17 734-957-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BELLEVILLE MI
2016-06-15 734-366-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 WAYNE MI
2016-05-13 734-767-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 WYANDOTTE MI
2016-04-28 734-201-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 DEXTER MI
2016-04-28 734-201-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 DEXTER MI
2016-04-28 734-201-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 DEXTER MI
2016-04-28 734-201-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 DEXTER MI
2016-04-28 734-201-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 DEXTER MI
2016-04-28 734-201-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 DEXTER MI
2016-04-28 734-201-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 DEXTER MI
2016-04-28 734-201-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 DEXTER MI
2016-04-28 734-577-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 WILLIS MI
2016-04-28 734-577-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 WILLIS MI
2016-04-28 734-577-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 WILLIS MI
2016-04-28 734-577-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 WILLIS MI
2016-04-28 734-577-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 WILLIS MI
2016-04-28 734-577-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 WILLIS MI
2016-04-28 734-577-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 WILLIS MI
2016-04-28 734-577-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 WILLIS MI
2016-04-28 734-773-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J ANN ARBOR MI
2016-04-27 734-466-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C LIVONIA MI
2016-04-14 734-415-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E NEW BOSTON MI
2016-04-11 734-234-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E TEMPERANCE MI
2016-04-11 734-441-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E ROCKWOOD MI
2016-04-11 734-666-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E LIVONIA MI
2016-04-11 734-743-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E LIVONIA MI
2016-04-11 734-767-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E WYANDOTTE MI
2016-04-11 734-772-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E LIVONIA MI
2016-04-11 734-772-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E LIVONIA MI
2016-04-11 734-793-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E LIVONIA MI
2016-04-11 734-984-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E FLAT ROCK MI
2016-04-06 734-351-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 WAYNE MI
2016-04-06 734-793-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 LIVONIA MI
2016-04-05 734-228-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C PLYMOUTH MI
2016-04-05 734-228-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C PLYMOUTH MI
2016-03-30 734-247-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROMULUS MI
2016-03-30 734-442-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROMULUS 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.