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
2019-12-12 734-492-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 ANN ARBOR MI
2019-12-11 734-492-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E ANN ARBOR MI
2019-12-03 734-492-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ANN ARBOR MI
2019-12-03 734-737-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PLYMOUTH MI
2019-11-26 734-969-2XXX 2000–2999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G ROCKWOOD MI
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
2019-10-10 734-492-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J ANN ARBOR MI
2019-09-27 734-280-3XXX 3000–3999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G WYANDOTTE MI
2019-09-27 734-382-9XXX 9000–9999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G GREGORY MI
2019-09-27 734-470-8XXX 8000–8999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G SALINE MI
2019-09-19 734-346-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TRENTON MI
2019-09-19 734-410-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MONROE MI
2019-09-11 734-492-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ANN ARBOR MI
2019-09-09 734-899-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E WAYNE MI
2019-09-03 734-412-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ANN ARBOR MI
2019-08-21 734-492-1XXX 1000–1999Assigned 123.NET, LLC 2550 ANN ARBOR MI
2019-08-07 734-518-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LIVONIA MI
2019-06-19 734-493-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TRENTON MI
2019-06-11 734-366-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 WAYNE MI
2019-06-11 734-724-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DEXTER MI
2019-05-30 734-415-1XXX 1000–1999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G NEW BOSTON MI
2019-05-28 734-884-4XXX 4000–4999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G LIVONIA MI
2019-05-28 734-897-7XXX 7000–7999Assigned METROPCS, INC. 5562 FLAT ROCK MI
2019-05-28 734-897-8XXX 8000–8999Assigned METROPCS, INC. 5562 FLAT ROCK MI
2019-05-24 734-492-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E ANN ARBOR MI
2019-05-20 734-489-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E ANN ARBOR MI
2019-05-15 734-897-1XXX 1000–1999Assigned 123.NET, LLC 2550 FLAT ROCK MI
2019-04-30 734-212-9XXX 9000–9999Assigned 123.NET, LLC 2550 MANCHESTER MI
2019-04-25 734-807-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E TEMPERANCE MI
2019-04-09 734-412-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E ANN ARBOR MI
2019-04-09 734-412-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E ANN ARBOR MI
2019-04-05 734-412-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ANN ARBOR MI
2019-04-05 734-800-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ANN ARBOR MI
2019-03-29 734-410-7XXX 7000–7999Assigned CHARTER IP ENABLED SERVICES, LLC 792K MONROE MI
2019-02-28 734-412-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E ANN ARBOR MI
2019-02-06 734-346-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TRENTON 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.