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
2015-12-07 231-681-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C FRUITPORT MI
2015-12-07 231-681-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C FRUITPORT MI
2015-12-07 231-788-9XXX 9000–9999Assigned ONVOY, LLCV - MI 543C MUSKEGON MI
2015-12-02 231-403-9XXX 9000–9999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G WILLIAMSBG MI
2015-12-02 231-525-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C WOLVERINE MI
2015-12-02 231-787-2XXX 2000–2999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G WHITECLOUD MI
2015-12-02 231-833-6XXX 6000–6999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G WOLVERINE MI
2015-12-02 231-938-6XXX 6000–6999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G TRAVERSECY MI
2015-12-01 231-216-1XXX 1000–1999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G FRANKFORT MI
2015-12-01 231-442-1XXX 1000–1999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G HARRIETTA MI
2015-12-01 231-790-8XXX 8000–8999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G FREESOIL MI
2015-11-30 231-386-0XXX 0000–0999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G NORTHPORT MI
2015-11-30 231-422-0XXX 0000–0999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G PELLSTON MI
2015-11-30 231-427-9XXX 9000–9999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G MACKINAWCY MI
2015-11-30 231-434-0XXX 0000–0999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G MANTON MI
2015-11-30 231-465-6XXX 6000–6999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G REED CITY MI
2015-11-30 231-489-1XXX 1000–1999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G PETOSKEY MI
2015-11-30 231-587-3XXX 3000–3999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G MANCELONA MI
2015-11-30 231-655-0XXX 0000–0999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G MANISTEE MI
2015-11-30 231-797-9XXX 9000–9999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G LUTHER MI
2015-11-30 231-936-3XXX 3000–3999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G SCOTTVILLE MI
2015-11-27 231-220-9XXX 9000–9999Assigned ONVOY, LLCV - MI 543C MUSKEGON MI
2015-11-27 231-366-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C FRUITPORT MI
2015-11-27 231-571-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C MUSKEGON MI
2015-11-27 231-599-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C EASTPORT MI
2015-11-27 231-599-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C EASTPORT MI
2015-11-27 231-681-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C FRUITPORT MI
2015-11-25 231-221-0XXX 0000–0999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G HARBOR SPG MI
2015-11-25 231-266-9XXX 9000–9999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G IRONS MI
2015-11-25 231-290-6XXX 6000–6999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G INDIAN RIV MI
2015-11-25 231-538-1XXX 1000–1999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G FREMONT MI
2015-11-25 231-774-9XXX 9000–9999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G INTERLOCHN MI
2015-11-24 231-262-0XXX 0000–0999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G ELMIRA MI
2015-11-24 231-264-2XXX 2000–2999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G ELK RAPIDS MI
2015-11-24 231-265-0XXX 0000–0999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G CORAL MI
2015-11-24 231-462-8XXX 8000–8999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G FOUNTAIN MI
2015-11-24 231-484-1XXX 1000–1999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G EASTJORDAN MI
2015-11-24 231-734-8XXX 8000–8999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G EVART MI
2015-11-23 231-237-7XXX 7000–7999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G CHARLEVOIX MI
2015-11-23 231-333-1XXX 1000–1999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G CHEBOYGAN MI
2015-11-23 231-444-0XXX 0000–0999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G CADILLAC MI
2015-11-20 231-440-8XXX 8000–8999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G BALDWIN MI
2015-11-16 231-518-1XXX 1000–1999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G KALKASKA MI
2015-11-11 231-835-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E GLEN LAKE MI
2015-10-21 231-375-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J MUSKEGON MI
2015-10-16 231-203-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ALANSON MI
2015-10-06 231-377-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C CLAM RIVER MI
2015-10-01 231-747-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MUSKEGON MI
2015-09-22 231-328-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 MERRITT MI
2015-09-22 231-549-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BOYNEFALLS 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.