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
2014-09-18 734-780-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ANN ARBOR MI
2014-09-15 734-743-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J LIVONIA MI
2014-09-12 734-999-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 YPSILANTI MI
2014-09-12 734-999-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 YPSILANTI MI
2014-09-12 734-999-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 YPSILANTI MI
2014-09-08 734-636-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C MONROE MI
2014-09-08 734-636-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C MONROE MI
2014-09-05 734-887-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C ANN ARBOR MI
2014-09-05 734-887-9XXX 9000–9999Assigned ONVOY, LLCV - MI 543C ANN ARBOR MI
2014-09-02 734-790-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MONROE MI
2014-08-28 734-743-4XXX 4000–4999Assigned TELNET WORLDWIDE, INC. 817J LIVONIA MI
2014-08-25 734-256-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E WILLIS MI
2014-08-20 734-275-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E PINCKNEY MI
2014-08-20 734-436-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E ANN ARBOR MI
2014-08-20 734-470-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E SALINE MI
2014-08-20 734-656-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E PLYMOUTH MI
2014-08-20 734-725-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 WAYNE MI
2014-08-20 734-725-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 WAYNE MI
2014-08-20 734-743-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E LIVONIA MI
2014-08-11 734-203-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E NEW BOSTON MI
2014-08-07 734-335-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J PLYMOUTH MI
2014-08-05 734-666-9XXX 9000–9999Assigned ONVOY, LLCV - MI 543C LIVONIA MI
2014-08-05 734-999-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E YPSILANTI MI
2014-08-04 734-582-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C PLYMOUTH MI
2014-08-04 734-790-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MONROE MI
2014-07-25 734-235-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J IDA MI
2014-07-25 734-436-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J ANN ARBOR MI
2014-07-23 734-666-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 LIVONIA MI
2014-07-11 734-928-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PLYMOUTH MI
2014-07-11 734-983-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PLYMOUTH MI
2014-06-27 734-224-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E TEMPERANCE MI
2014-06-27 734-249-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E ANN ARBOR MI
2014-06-27 734-530-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E WYANDOTTE MI
2014-06-27 734-535-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E FLAT ROCK MI
2014-06-27 734-796-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E BELLEVILLE MI
2014-06-24 734-992-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J ROMULUS MI
2014-06-19 734-820-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MAYBEE MI
2014-06-19 734-820-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MAYBEE MI
2014-06-19 734-820-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MAYBEE MI
2014-06-19 734-820-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MAYBEE MI
2014-06-19 734-820-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MAYBEE MI
2014-06-16 734-275-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 PINCKNEY MI
2014-06-16 734-275-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 PINCKNEY MI
2014-06-16 734-275-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 PINCKNEY MI
2014-06-16 734-275-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 PINCKNEY MI
2014-06-16 734-275-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 PINCKNEY MI
2014-06-16 734-403-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROMULUS MI
2014-06-16 734-403-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROMULUS MI
2014-06-16 734-413-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROMULUS MI
2014-06-16 734-413-6XXX 6000–6999Assigned 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.