NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

10 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 517
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 5
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 1
LEVEL 3 COMMUNICATIONS, LLC - MI 1
INTRADO COMMUNICATIONS, LLC 1
BOOST SUBSCRIBERCO L.L.C. 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
2009-08-27 517-996-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WILLIAMSTN MI
2009-08-20 517-338-9XXX 9000–9999Assigned CLEAR RATE COMMUNICATIONS, LLC 046L HOWELL MI
2009-08-18 517-612-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 JACKSON MI
2009-07-30 517-554-7XXX 7000–7999Assigned METROPCS, INC. 5562 ALBION MI
2009-07-30 517-883-3XXX 3000–3999Assigned METROPCS, INC. 5562 MASON MI
2009-07-24 517-925-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J GRANDLEDGE MI
2009-07-20 517-348-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LANSING MI
2009-07-20 517-348-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LANSING MI
2009-07-20 517-348-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LANSING MI
2009-07-13 517-817-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JACKSON MI
2009-07-13 517-817-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JACKSON MI
2009-07-13 517-817-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JACKSON MI
2009-07-07 517-697-0XXX 0000–0999Assigned DAYSTARR LLC DBA DAYSTARR COMMUNICATIONS 993L PERRY MI
2009-06-29 517-586-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 7279 HOWELL MI
2009-06-26 517-515-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LANSING MI
2009-06-26 517-802-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LANSING MI
2009-06-26 517-802-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LANSING MI
2009-06-12 517-908-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E LANSING MI
2009-05-22 517-703-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LANSING MI
2009-05-22 517-703-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LANSING MI
2009-05-22 517-750-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JACKSON MI
2009-05-22 517-750-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JACKSON MI
2009-05-15 517-769-8XXX 8000–8999Assigned CLEAR RATE COMMUNICATIONS, LLC 046L JACKSON MI
2009-05-15 517-920-7XXX 7000–7999Assigned CLEAR RATE COMMUNICATIONS, LLC 046L ADRIAN MI
2009-05-14 517-348-1XXX 1000–1999Assigned FIRST COMMUNICATIONS, LLC 460K LANSING MI
2009-05-14 517-993-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 LANSING MI
2009-05-14 517-993-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 LANSING MI
2009-05-13 517-769-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 JACKSON MI
2009-05-13 517-769-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 JACKSON MI
2009-05-04 517-209-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E HOLT MI
2009-04-23 517-769-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JACKSON MI
2009-04-23 517-769-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JACKSON MI
2009-04-17 517-515-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LANSING MI
2009-04-17 517-515-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LANSING MI
2009-03-31 517-630-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ALBION MI
2009-03-17 517-306-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 HUDSON MI
2009-03-02 517-920-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 ADRIAN MI
2009-02-19 517-441-2XXX 2000–2999Assigned 123.NET, LLC 2550 EATON RPD MI
2009-02-19 517-945-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JACKSON MI
2009-02-19 517-945-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JACKSON MI
2009-02-18 517-515-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LANSING MI
2009-02-12 517-742-4XXX 4000–4999Assigned 123.NET, LLC 2550 HOLT MI
2009-02-06 517-348-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C LANSING MI
2009-01-23 517-826-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E JONESVILLE MI
2009-01-20 517-883-0XXX 0000–0999Assigned FIRST COMMUNICATIONS, LLC 460K MASON MI
2009-01-13 517-315-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JACKSON MI
2009-01-13 517-748-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 JACKSON MI
2009-01-13 517-977-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 LANSING MI
2009-01-13 517-977-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 LANSING MI
2009-01-13 517-977-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 LANSING 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.