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
2012-08-22 231-714-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E TRAVERSECY MI
2012-08-06 231-445-9XXX 9000–9999Assigned CHARTER IP ENABLED SERVICES, LLC 792K CHEBOYGAN MI
2012-08-06 231-943-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K TRAVERSECY MI
2012-08-03 231-598-9XXX 9000–9999Assigned CHARTER IP ENABLED SERVICES, LLC 792K BIG RAPIDS MI
2012-07-12 231-303-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 NEWAYGO MI
2012-07-12 231-660-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 BIG RAPIDS MI
2012-07-12 231-846-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 CADILLAC MI
2012-06-13 231-588-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E ELLSWORTH MI
2012-06-07 231-282-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E GRANT MI
2012-06-07 231-383-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E BEULAH MI
2012-06-07 231-384-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E KALKASKA MI
2012-06-07 231-399-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E FRANKFORT MI
2012-06-07 231-497-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E BOYNE CITY MI
2012-06-07 231-689-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E WHITECLOUD MI
2012-06-04 231-642-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J TRAVERSECY MI
2012-06-04 231-903-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 MUSKEGON MI
2012-05-14 231-291-0XXX 0000–0999Assigned TELNET WORLDWIDE, INC. 817J MUSKEGON MI
2012-05-14 231-291-1XXX 1000–1999Assigned TELNET WORLDWIDE, INC. 817J MUSKEGON MI
2012-05-14 231-291-2XXX 2000–2999Assigned TELNET WORLDWIDE, INC. 817J MUSKEGON MI
2012-05-14 231-291-3XXX 3000–3999Assigned TELNET WORLDWIDE, INC. 817J MUSKEGON MI
2012-05-14 231-291-4XXX 4000–4999Assigned TELNET WORLDWIDE, INC. 817J MUSKEGON MI
2012-05-14 231-291-5XXX 5000–5999Assigned TELNET WORLDWIDE, INC. 817J MUSKEGON MI
2012-05-14 231-291-6XXX 6000–6999Assigned TELNET WORLDWIDE, INC. 817J MUSKEGON MI
2012-05-14 231-291-7XXX 7000–7999Assigned TELNET WORLDWIDE, INC. 817J MUSKEGON MI
2012-05-14 231-291-8XXX 8000–8999Assigned TELNET WORLDWIDE, INC. 817J MUSKEGON MI
2012-05-14 231-291-9XXX 9000–9999Assigned TELNET WORLDWIDE, INC. 817J MUSKEGON MI
2012-05-04 231-222-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C EASTJORDAN MI
2012-05-04 231-237-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C CHARLEVOIX MI
2012-05-04 231-290-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C INDIAN RIV MI
2012-05-04 231-299-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C MANISTEE MI
2012-05-04 231-354-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C CORAL MI
2012-05-04 231-389-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C HARRIETTA MI
2012-05-04 231-399-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C FRANKFORT MI
2012-05-04 231-403-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C WILLIAMSBG MI
2012-05-04 231-412-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C HARBOR SPG MI
2012-05-04 231-427-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C MACKINAWCY MI
2012-05-04 231-432-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C NORTHPORT MI
2012-05-04 231-468-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C CADILLAC MI
2012-05-04 231-498-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C ELK RAPIDS MI
2012-05-04 231-518-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C KALKASKA MI
2012-05-04 231-525-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C WOLVERINE MI
2012-05-04 231-535-9XXX 9000–9999Assigned ONVOY, LLCV - MI 543C WALLOON LK MI
2012-05-04 231-536-6XXX 6000–6999Assigned 123.NET, LLC 2550 EASTJORDAN MI
2012-05-04 231-597-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C CHEBOYGAN MI
2012-05-04 231-598-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C BIG RAPIDS MI
2012-05-04 231-674-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C GRANT MI
2012-05-04 231-680-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C REED CITY MI
2012-05-04 231-758-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C PETOSKEY MI
2012-05-04 231-774-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C INTERLOCHN MI
2012-05-04 231-790-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C FREESOIL 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.