NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

7 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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 231
NEW CINGULAR WIRELESS PCS, LLC - IL 2
EXIANT COMMUNICATIONS LLC 2
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 2
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
2004-06-22 231-525-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 WOLVERINE MI
2004-06-22 231-613-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 SCOTTVILLE MI
2004-06-22 231-674-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 GRANT MI
2004-06-22 231-794-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 MANISTEE MI
2004-06-22 231-803-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 MORLEY MI
2004-06-22 231-844-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 INDIAN RIV MI
2004-06-22 231-861-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 SHELBY MI
2004-06-22 231-916-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 MANCELONA MI
2004-06-22 231-923-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 HART MI
2004-06-22 231-937-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 HOWARDCITY MI
2004-06-15 231-354-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 CORAL MI
2004-06-15 231-544-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 CENTRAL LK MI
2004-06-15 231-570-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 FIFE LAKE MI
2004-06-15 231-930-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 BEULAH MI
2004-06-14 231-668-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 TRAVERSECY MI
2004-06-14 231-668-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 TRAVERSECY MI
2004-06-04 231-222-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 EASTJORDAN MI
2004-06-04 231-333-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 CHEBOYGAN MI
2004-06-04 231-480-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 LUDINGTON MI
2004-05-28 231-225-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 FREMONT MI
2004-05-27 231-758-3XXX 3000–3999Assigned CYNERGYCOMM.NET, INC. - MI 9245 PETOSKEY MI
2004-05-12 231-534-6XXX 6000–6999Assigned MICHIGAN BELL TEL CO 9323 TRAVERSECY MI
2004-05-12 231-534-7XXX 7000–7999Assigned MICHIGAN BELL TEL CO 9323 TRAVERSECY MI
2004-04-08 231-735-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 TRAVERSECY MI
2004-03-15 231-392-0XXX 0000–0999Assigned MICHIGAN BELL TEL CO 9323 TRAVERSECY MI
2004-02-24 231-392-7XXX 7000–7999Assigned MICHIGAN BELL TEL CO 9323 TRAVERSECY MI
2004-02-24 231-392-8XXX 8000–8999Assigned MICHIGAN BELL TEL CO 9323 TRAVERSECY MI
2004-02-02 231-944-1XXX 1000–1999Assigned CYNERGYCOMM.NET, INC. - MI 9245 TRAVERSECY MI
2004-01-12 231-267-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J WILLIAMSBG MI
2004-01-12 231-432-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J NORTHPORT MI
2004-01-12 231-436-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J MACKINAWCY MI
2004-01-12 231-459-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J BOYNE CITY MI
2004-01-12 231-525-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J WOLVERINE MI
2004-01-12 231-535-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J WALLOON LK MI
2004-01-12 231-539-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J PELLSTON MI
2004-01-12 231-667-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J MARION MI
2004-01-12 231-753-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J PETOSKEY MI
2004-01-12 231-791-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J REED CITY MI
2004-01-12 231-794-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J MANISTEE MI
2004-01-12 231-797-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J LUTHER MI
2004-01-12 231-824-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J MANTON MI
2004-01-12 231-825-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J MCBAIN MI
2004-01-12 231-829-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J TUSTIN MI
2004-01-12 231-856-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J MORLEY MI
2004-01-12 231-889-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J ONEKAMA MI
2004-01-12 231-916-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J MANCELONA MI
2004-01-12 231-936-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J SCOTTVILLE MI
2003-12-30 231-222-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J EASTJORDAN MI
2003-12-30 231-256-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J LKLEELANAU MI
2003-12-30 231-264-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J ELK RAPIDS MI

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.