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
2024-05-15 231-648-7XXX 7000–7999Assigned BOOST SUBSCRIBERCO L.L.C. 490J HOWARDCITY MI
2024-04-29 231-968-2XXX 2000–2999Assigned TERRA NOVA TELECOM INC. 145J CADILLAC MI
2024-04-25 231-320-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H TRCHRIVBDG MI
2024-04-25 231-417-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H PETOSKEY MI
2024-04-25 231-418-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H MARION MI
2024-04-25 231-475-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H MANTON MI
2024-04-19 231-430-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H BOYNE CITY MI
2024-04-01 231-559-5XXX 5000–5999Assigned CHARTER IP ENABLED SERVICES, LLC 792K MCBAIN MI
2024-03-15 231-844-7XXX 7000–7999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G INDIAN RIV MI
2024-03-07 231-594-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 HART MI
2024-03-01 231-453-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K HOLTON MI
2024-02-26 231-367-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K WOLVERINE MI
2024-02-21 231-406-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K FALMOUTH MI
2024-01-17 231-643-3XXX 3000–3999Assigned TERRA NOVA TELECOM INC. 145J MORLEY MI
2024-01-12 231-279-7XXX 7000–7999Assigned TERRA NOVA TELECOM INC. 145J BIG RAPIDS MI
2024-01-12 231-371-1XXX 1000–1999Assigned TERRA NOVA TELECOM INC. 145J TUSTIN MI
2024-01-12 231-925-5XXX 5000–5999Assigned TERRA NOVA TELECOM INC. 145J SCOTTVILLE MI
2024-01-10 231-224-2XXX 2000–2999Assigned TERRA NOVA TELECOM INC. 145J FREMONT MI
2024-01-10 231-270-0XXX 0000–0999Assigned TERRA NOVA TELECOM INC. 145J BOYNE CITY MI
2024-01-10 231-284-5XXX 5000–5999Assigned TERRA NOVA TELECOM INC. 145J MANISTEE MI
2024-01-10 231-379-9XXX 9000–9999Assigned TERRA NOVA TELECOM INC. 145J ONEKAMA MI
2024-01-10 231-380-0XXX 0000–0999Assigned TERRA NOVA TELECOM INC. 145J NEWAYGO MI
2024-01-10 231-475-2XXX 2000–2999Assigned TERRA NOVA TELECOM INC. 145J MANTON MI
2024-01-10 231-797-7XXX 7000–7999Assigned TERRA NOVA TELECOM INC. 145J LUTHER MI
2024-01-10 231-831-1XXX 1000–1999Assigned TERRA NOVA TELECOM INC. 145J EASTJORDAN MI
2024-01-04 231-721-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 HART MI
2023-12-05 231-428-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MUSKEGON MI
2023-10-16 231-846-6XXX 6000–6999Assigned TERRA NOVA TELECOM INC. 145J CADILLAC MI
2023-09-29 231-280-9XXX 9000–9999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G MANCELONA MI
2023-09-29 231-391-9XXX 9000–9999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G WALLOON LK MI
2023-09-29 231-418-9XXX 9000–9999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G MARION MI
2023-09-29 231-466-9XXX 9000–9999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G EVART MI
2023-09-29 231-475-8XXX 8000–8999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G MANTON MI
2023-09-29 231-613-9XXX 9000–9999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G SCOTTVILLE MI
2023-09-29 231-831-9XXX 9000–9999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G EASTJORDAN MI
2023-09-29 231-872-8XXX 8000–8999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G REED CITY MI
2023-09-29 231-977-9XXX 9000–9999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G MACKINAWCY MI
2023-09-28 231-419-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 BELLAIRE MI
2023-09-08 231-210-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E ST JAMES MI
2023-09-08 231-224-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C FREMONT MI
2023-09-08 231-278-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C HESPERIA MI
2023-09-01 231-428-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MUSKEGON MI
2023-09-01 231-563-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MUSKEGON MI
2023-08-30 231-320-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C TRCHRIVBDG MI
2023-08-25 231-367-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C WOLVERINE MI
2023-08-25 231-466-1XXX 1000–1999Assigned AT&T ENTERPRISES, LLC 516C EVART MI
2023-08-25 231-475-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C MANTON MI
2023-08-25 231-800-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C LUTHER MI
2023-08-23 231-212-9XXX 9000–9999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G INTERLOCHN MI
2023-08-23 231-224-9XXX 9000–9999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G FREMONT 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.