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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2019-04-23 231-888-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E TWIN LAKE MI
2019-04-10 231-531-9XXX 9000–9999Assigned METROPCS, INC. 5562 MUSKEGON MI
2019-02-28 231-257-0XXX 0000–0999Assigned PENINSULA FIBER NETWORK, LLC - MI 116F LAKE CITY MI
2019-02-27 231-564-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 KALKASKA MI
2019-01-08 231-340-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ELMIRA MI
2019-01-08 231-340-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ELMIRA MI
2019-01-03 231-261-0XXX 0000–0999Assigned PENINSULA FIBER NETWORK, LLC - MI 116F LUDINGTON MI
2018-11-28 231-247-1XXX 1000–1999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G WILLIAMSBG MI
2018-11-28 231-442-3XXX 3000–3999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G HARRIETTA MI
2018-11-28 231-464-1XXX 1000–1999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G FREESOIL MI
2018-11-28 231-787-3XXX 3000–3999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G WHITECLOUD MI
2018-11-28 231-819-8XXX 8000–8999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G TUSTIN MI
2018-11-28 231-833-8XXX 8000–8999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G WOLVERINE MI
2018-11-15 231-624-9XXX 9000–9999Assigned PENINSULA FIBER NETWORK, LLC - MI 116F KALKASKA MI
2018-11-14 231-277-4XXX 4000–4999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G FOUNTAIN MI
2018-11-14 231-465-7XXX 7000–7999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G REED CITY MI
2018-11-14 231-484-2XXX 2000–2999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G EASTJORDAN MI
2018-11-14 231-939-1XXX 1000–1999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G PETOSKEY MI
2018-11-09 231-253-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 CADILLAC MI
2018-11-09 231-253-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 CADILLAC MI
2018-11-09 231-253-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 CADILLAC MI
2018-11-09 231-253-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 CADILLAC MI
2018-11-06 231-942-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 CADILLAC MI
2018-10-22 231-289-9XXX 9000–9999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G CHARLEVOIX MI
2018-10-22 231-751-3XXX 3000–3999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G WALLOON LK MI
2018-10-22 231-886-9XXX 9000–9999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G KALKASKA MI
2018-10-01 231-247-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E WILLIAMSBG MI
2018-09-26 231-216-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E FRANKFORT MI
2018-09-26 231-310-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C FALMOUTH MI
2018-09-26 231-564-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E KALKASKA MI
2018-09-26 231-923-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 HART MI
2018-09-20 231-201-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C CHIPPEWALK MI
2018-09-20 231-202-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C MECOSTA MI
2018-09-18 231-260-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MUSKEGON MI
2018-08-30 231-251-9XXX 9000–9999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G LKLEELANAU MI
2018-08-20 231-216-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C FRANKFORT MI
2018-08-20 231-251-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C LKLEELANAU MI
2018-08-20 231-666-7XXX 7000–7999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G MUSKEGON MI
2018-08-13 231-666-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MUSKEGON MI
2018-08-13 231-666-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MUSKEGON MI
2018-08-08 231-246-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E MUSKEGON MI
2018-07-31 231-480-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E LUDINGTON MI
2018-07-20 231-289-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E CHARLEVOIX MI
2018-06-15 231-244-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C BOYNE CITY MI
2018-06-13 231-655-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MANISTEE MI
2018-05-22 231-237-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E CHARLEVOIX MI
2018-05-03 231-239-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E LUDINGTON MI
2018-05-03 231-307-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E MORLEY MI
2018-04-11 231-434-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MANTON MI
2018-04-11 231-444-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CADILLAC 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.