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
2006-12-15 231-942-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CADILLAC MI
2006-12-15 231-944-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 TRAVERSECY MI
2006-12-15 231-944-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 TRAVERSECY MI
2006-12-06 231-652-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 NEWAYGO MI
2006-11-29 231-981-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 WHITEHALL MI
2006-11-29 231-981-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 WHITEHALL MI
2006-10-20 231-464-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 FREESOIL MI
2006-10-13 231-241-0XXX 0000–0999Assigned DAYSTARR LLC DBA DAYSTARR COMMUNICATIONS 993L PENTWATER MI
2006-10-09 231-360-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 TRAVERSECY MI
2006-10-09 231-903-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MUSKEGON MI
2006-10-09 231-903-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MUSKEGON MI
2006-10-05 231-288-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MUSKEGON MI
2006-10-05 231-288-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MUSKEGON MI
2006-09-06 231-288-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MUSKEGON MI
2006-08-10 231-421-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 TRAVERSECY MI
2006-08-10 231-421-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 TRAVERSECY MI
2006-08-10 231-622-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 PETOSKEY MI
2006-08-10 231-622-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 PETOSKEY MI
2006-07-25 231-335-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 FREMONT MI
2006-07-24 231-753-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E PETOSKEY MI
2006-07-21 231-668-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 TRAVERSECY MI
2006-06-30 231-577-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 CADILLAC MI
2006-06-20 231-335-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 FREMONT MI
2006-06-08 231-903-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MUSKEGON MI
2006-06-06 231-563-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MUSKEGON MI
2006-06-06 231-742-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HART MI
2006-05-26 231-769-4XXX 4000–4999Assigned CYNERGYCOMM.NET, INC. - MI 9245 MUSKEGON MI
2006-05-19 231-460-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 BIG RAPIDS MI
2006-05-19 231-769-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MUSKEGON MI
2006-05-18 231-923-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 HART MI
2006-04-27 231-322-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 TRCHRIVBDG MI
2006-04-27 231-414-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 NEWAYGO MI
2006-04-27 231-459-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 BOYNE CITY MI
2006-04-27 231-646-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 ELLSWORTH MI
2006-04-27 231-889-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 ONEKAMA MI
2006-04-25 231-350-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 BELLAIRE MI
2006-04-25 231-942-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 CADILLAC MI
2006-04-20 231-384-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 KALKASKA MI
2006-03-21 231-457-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MUSKEGON MI
2006-03-21 231-457-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MUSKEGON MI
2006-03-10 231-683-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 7157 MUSKEGON MI
2006-03-01 231-683-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 MUSKEGON MI
2006-02-14 231-220-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MUSKEGON MI
2006-01-23 231-414-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 NEWAYGO MI
2006-01-20 231-622-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 PETOSKEY MI
2006-01-18 231-384-4XXX 4000–4999Assigned CYNERGYCOMM.NET, INC. - MI 9245 KALKASKA MI
2006-01-18 231-679-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 BIG RAPIDS MI
2006-01-18 231-679-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 BIG RAPIDS MI
2006-01-18 231-679-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 BIG RAPIDS MI
2006-01-10 231-457-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MUSKEGON 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.