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
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2005-01-18 231-432-1XXX 1000–1999Assigned ACD TELECOM, INC. - MI 3535 NORTHPORT MI
2005-01-18 231-457-1XXX 1000–1999Assigned ACD TELECOM, INC. - MI 3535 MUSKEGON MI
2005-01-18 231-465-2XXX 2000–2999Assigned ACD TELECOM, INC. - MI 3535 REED CITY MI
2005-01-18 231-535-1XXX 1000–1999Assigned ACD TELECOM, INC. - MI 3535 WALLOON LK MI
2005-01-18 231-539-2XXX 2000–2999Assigned ACD TELECOM, INC. - MI 3535 PELLSTON MI
2005-01-18 231-613-1XXX 1000–1999Assigned ACD TELECOM, INC. - MI 3535 SCOTTVILLE MI
2005-01-18 231-622-0XXX 0000–0999Assigned ACD TELECOM, INC. - MI 3535 PETOSKEY MI
2005-01-18 231-667-3XXX 3000–3999Assigned ACD TELECOM, INC. - MI 3535 MARION MI
2005-01-18 231-689-4XXX 4000–4999Assigned ACD TELECOM, INC. - MI 3535 WHITECLOUD MI
2005-01-18 231-823-5XXX 5000–5999Assigned ACD TELECOM, INC. - MI 3535 STANWOOD MI
2005-01-18 231-824-1XXX 1000–1999Assigned ACD TELECOM, INC. - MI 3535 MANTON MI
2005-01-18 231-825-7XXX 7000–7999Assigned ACD TELECOM, INC. - MI 3535 MCBAIN MI
2005-01-18 231-828-3XXX 3000–3999Assigned ACD TELECOM, INC. - MI 3535 TWIN LAKE MI
2005-01-18 231-829-1XXX 1000–1999Assigned ACD TELECOM, INC. - MI 3535 TUSTIN MI
2005-01-18 231-853-4XXX 4000–4999Assigned ACD TELECOM, INC. - MI 3535 RAVENNA MI
2005-01-18 231-861-9XXX 9000–9999Assigned ACD TELECOM, INC. - MI 3535 SHELBY MI
2005-01-18 231-866-7XXX 7000–7999Assigned ACD TELECOM, INC. - MI 3535 SUTTONSBAY MI
2005-01-18 231-869-1XXX 1000–1999Assigned ACD TELECOM, INC. - MI 3535 PENTWATER MI
2005-01-18 231-889-1XXX 1000–1999Assigned ACD TELECOM, INC. - MI 3535 ONEKAMA MI
2005-01-18 231-981-1XXX 1000–1999Assigned ACD TELECOM, INC. - MI 3535 WHITEHALL MI
2005-01-13 231-518-2XXX 2000–2999Assigned ACD TELECOM, INC. - MI 3535 KALKASKA MI
2005-01-12 231-225-7XXX 7000–7999Assigned ACD TELECOM, INC. - MI 3535 FREMONT MI
2005-01-12 231-242-9XXX 9000–9999Assigned ACD TELECOM, INC. - MI 3535 HARBOR SPG MI
2005-01-12 231-266-1XXX 1000–1999Assigned ACD TELECOM, INC. - MI 3535 IRONS MI
2005-01-12 231-282-6XXX 6000–6999Assigned ACD TELECOM, INC. - MI 3535 GRANT MI
2005-01-12 231-301-6XXX 6000–6999Assigned ACD TELECOM, INC. - MI 3535 HART MI
2005-01-12 231-366-0XXX 0000–0999Assigned ACD TELECOM, INC. - MI 3535 FRUITPORT MI
2005-01-12 231-389-4XXX 4000–4999Assigned ACD TELECOM, INC. - MI 3535 HARRIETTA MI
2005-01-12 231-425-2XXX 2000–2999Assigned ACD TELECOM, INC. - MI 3535 LUDINGTON MI
2005-01-12 231-436-0XXX 0000–0999Assigned ACD TELECOM, INC. - MI 3535 MACKINAWCY MI
2005-01-12 231-462-0XXX 0000–0999Assigned ACD TELECOM, INC. - MI 3535 FOUNTAIN MI
2005-01-12 231-570-1XXX 1000–1999Assigned ACD TELECOM, INC. - MI 3535 FIFE LAKE MI
2005-01-12 231-640-1XXX 1000–1999Assigned ACD TELECOM, INC. - MI 3535 LAKE ANN MI
2005-01-12 231-768-1XXX 1000–1999Assigned ACD TELECOM, INC. - MI 3535 LE ROY MI
2005-01-12 231-790-1XXX 1000–1999Assigned ACD TELECOM, INC. - MI 3535 FREESOIL MI
2005-01-12 231-797-0XXX 0000–0999Assigned ACD TELECOM, INC. - MI 3535 LUTHER MI
2005-01-12 231-821-4XXX 4000–4999Assigned ACD TELECOM, INC. - MI 3535 HOLTON MI
2005-01-12 231-835-4XXX 4000–4999Assigned ACD TELECOM, INC. - MI 3535 GLEN LAKE MI
2005-01-12 231-844-1XXX 1000–1999Assigned ACD TELECOM, INC. - MI 3535 INDIAN RIV MI
2005-01-12 231-887-2XXX 2000–2999Assigned ACD TELECOM, INC. - MI 3535 MANISTEE MI
2005-01-12 231-916-1XXX 1000–1999Assigned ACD TELECOM, INC. - MI 3535 MANCELONA MI
2005-01-12 231-937-0XXX 0000–0999Assigned ACD TELECOM, INC. - MI 3535 HOWARDCITY MI
2005-01-07 231-360-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 TRAVERSECY MI
2005-01-07 231-414-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 NEWAYGO MI
2005-01-07 231-534-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 TRAVERSECY MI
2005-01-07 231-534-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 TRAVERSECY MI
2005-01-05 231-747-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MUSKEGON MI
2004-12-30 231-360-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 TRAVERSECY MI
2004-12-30 231-903-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 MUSKEGON MI
2004-12-30 231-903-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MUSKEGON 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.