NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

7 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 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
2012-05-04 231-824-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C MANTON MI
2012-05-04 231-825-9XXX 9000–9999Assigned ONVOY, LLCV - MI 543C MCBAIN MI
2012-05-04 231-829-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C TUSTIN MI
2012-05-04 231-856-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C MORLEY MI
2012-05-04 231-879-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C FIFE LAKE MI
2012-05-04 231-916-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C MANCELONA MI
2012-05-04 231-930-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C BEULAH MI
2012-05-04 231-936-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C SCOTTVILLE MI
2012-05-04 231-994-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C LKLEELANAU MI
2012-05-02 231-299-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K MANISTEE MI
2012-04-16 231-222-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E EASTJORDAN MI
2012-04-11 231-299-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MANISTEE MI
2012-03-19 231-780-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MUSKEGON MI
2012-03-16 231-331-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E ALDEN MI
2012-03-09 231-714-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E TRAVERSECY MI
2012-03-06 231-570-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FIFE LAKE MI
2012-03-06 231-886-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KALKASKA MI
2012-02-13 231-290-7XXX 7000–7999Assigned CLEAR RATE COMMUNICATIONS, LLC 046L INDIAN RIV MI
2012-02-13 231-660-7XXX 7000–7999Assigned CLEAR RATE COMMUNICATIONS, LLC 046L BIG RAPIDS MI
2012-02-13 231-715-7XXX 7000–7999Assigned CLEAR RATE COMMUNICATIONS, LLC 046L TRAVERSECY MI
2012-02-10 231-766-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J MUSKEGON MI
2012-02-08 231-350-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 BELLAIRE MI
2012-02-03 231-714-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C TRAVERSECY MI
2012-02-03 231-928-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C FREMONT MI
2012-01-30 231-538-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 FREMONT MI
2012-01-17 231-923-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 HART MI
2011-12-28 231-299-9XXX 9000–9999Assigned METROPCS, INC. 5562 MANISTEE MI
2011-12-08 231-887-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E MANISTEE MI
2011-12-01 231-267-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E WILLIAMSBG MI
2011-12-01 231-525-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E WOLVERINE MI
2011-12-01 231-714-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E TRAVERSECY MI
2011-11-02 231-303-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NEWAYGO MI
2011-10-21 231-638-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 MUSKEGON MI
2011-10-21 231-907-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 LUDINGTON MI
2011-10-06 231-599-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K EASTPORT MI
2011-10-04 231-497-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BOYNE CITY MI
2011-10-04 231-660-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 BIG RAPIDS MI
2011-09-28 231-923-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 HART MI
2011-09-26 231-881-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PETOSKEY MI
2011-08-25 231-676-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BELLAIRE MI
2011-08-17 231-403-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C WILLIAMSBG MI
2011-08-17 231-427-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C MACKINAWCY MI
2011-08-15 231-942-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 CADILLAC MI
2011-08-11 231-238-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C INDIAN RIV MI
2011-08-11 231-303-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C NEWAYGO MI
2011-08-11 231-335-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C FREMONT MI
2011-08-11 231-338-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C BALDWIN MI
2011-08-11 231-354-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C CORAL MI
2011-08-11 231-388-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C LE ROY MI
2011-08-11 231-389-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C HARRIETTA 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.