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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2004-12-29 231-498-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 ELK RAPIDS MI
2004-12-13 231-903-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MUSKEGON MI
2004-11-15 231-747-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MUSKEGON MI
2004-11-15 231-747-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MUSKEGON MI
2004-10-22 231-498-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 ELK RAPIDS MI
2004-10-20 231-237-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 CHARLEVOIX MI
2004-10-18 231-267-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 WILLIAMSBG MI
2004-10-18 231-535-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 WALLOON LK MI
2004-10-18 231-903-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MUSKEGON MI
2004-10-18 231-981-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 WHITEHALL MI
2004-10-14 231-242-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 HARBOR SPG MI
2004-10-14 231-256-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 LKLEELANAU MI
2004-10-14 231-276-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 INTERLOCHN MI
2004-10-14 231-389-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 HARRIETTA MI
2004-10-14 231-539-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 PELLSTON MI
2004-10-14 231-821-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 HOLTON MI
2004-10-14 231-824-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 MANTON MI
2004-10-14 231-825-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 MCBAIN MI
2004-10-14 231-828-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 TWIN LAKE MI
2004-10-14 231-853-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 RAVENNA MI
2004-10-05 231-534-8XXX 8000–8999Assigned MICHIGAN BELL TEL CO 9323 TRAVERSECY MI
2004-10-04 231-794-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MANISTEE MI
2004-09-24 231-222-1XXX 1000–1999Assigned ACD TELECOM, INC. - MI 3535 EASTJORDAN MI
2004-09-24 231-237-3XXX 3000–3999Assigned ACD TELECOM, INC. - MI 3535 CHARLEVOIX MI
2004-09-24 231-264-1XXX 1000–1999Assigned ACD TELECOM, INC. - MI 3535 ELK RAPIDS MI
2004-09-24 231-331-0XXX 0000–0999Assigned ACD TELECOM, INC. - MI 3535 ALDEN MI
2004-09-24 231-333-2XXX 2000–2999Assigned ACD TELECOM, INC. - MI 3535 CHEBOYGAN MI
2004-09-24 231-354-1XXX 1000–1999Assigned ACD TELECOM, INC. - MI 3535 CORAL MI
2004-09-24 231-377-0XXX 0000–0999Assigned ACD TELECOM, INC. - MI 3535 CLAM RIVER MI
2004-09-24 231-392-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 TRAVERSECY MI
2004-09-24 231-459-0XXX 0000–0999Assigned ACD TELECOM, INC. - MI 3535 BOYNE CITY MI
2004-09-24 231-468-0XXX 0000–0999Assigned ACD TELECOM, INC. - MI 3535 CADILLAC MI
2004-09-24 231-533-0XXX 0000–0999Assigned ACD TELECOM, INC. - MI 3535 BELLAIRE MI
2004-09-24 231-544-0XXX 0000–0999Assigned ACD TELECOM, INC. - MI 3535 CENTRAL LK MI
2004-09-24 231-588-0XXX 0000–0999Assigned ACD TELECOM, INC. - MI 3535 ELLSWORTH MI
2004-09-24 231-599-0XXX 0000–0999Assigned ACD TELECOM, INC. - MI 3535 EASTPORT MI
2004-09-24 231-629-3XXX 3000–3999Assigned ACD TELECOM, INC. - MI 3535 BIG RAPIDS MI
2004-09-24 231-930-1XXX 1000–1999Assigned ACD TELECOM, INC. - MI 3535 BEULAH MI
2004-09-24 231-970-4XXX 4000–4999Assigned ACD TELECOM, INC. - MI 3535 BEAR LAKE MI
2004-09-17 231-571-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MUSKEGON MI
2004-09-17 231-571-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MUSKEGON MI
2004-08-25 231-944-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 TRAVERSECY MI
2004-08-25 231-944-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 TRAVERSECY MI
2004-08-25 231-944-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 TRAVERSECY MI
2004-07-16 231-668-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 TRAVERSECY MI
2004-07-15 231-747-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MUSKEGON MI
2004-06-22 231-352-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 FRANKFORT MI
2004-06-22 231-432-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 NORTHPORT MI
2004-06-22 231-436-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 MACKINAWCY MI
2004-06-22 231-518-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 KALKASKA 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.