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
2008-01-03 231-457-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J MUSKEGON MI
2008-01-03 231-563-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J MUSKEGON MI
2007-12-17 231-753-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E PETOSKEY MI
2007-12-14 231-457-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MUSKEGON MI
2007-11-29 231-437-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E CHARLEVOIX MI
2007-11-27 231-486-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J TRAVERSECY MI
2007-11-16 231-936-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K SCOTTVILLE MI
2007-11-15 231-571-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MUSKEGON MI
2007-11-15 231-571-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MUSKEGON MI
2007-11-05 231-944-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E TRAVERSECY MI
2007-10-30 231-288-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MUSKEGON MI
2007-10-09 231-333-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHEBOYGAN MI
2007-09-28 231-335-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 FREMONT MI
2007-09-28 231-818-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHEBOYGAN MI
2007-09-28 231-884-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CADILLAC MI
2007-09-18 231-887-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MANISTEE MI
2007-08-14 231-884-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CADILLAC MI
2007-08-07 231-388-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 LE ROY MI
2007-08-06 231-758-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 PETOSKEY MI
2007-07-12 231-676-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BELLAIRE MI
2007-07-12 231-818-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHEBOYGAN MI
2007-06-28 231-301-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 HART MI
2007-06-07 231-577-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 CADILLAC MI
2007-05-22 231-288-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MUSKEGON MI
2007-05-22 231-288-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MUSKEGON MI
2007-05-10 231-225-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 FREMONT MI
2007-05-08 231-288-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J MUSKEGON MI
2007-05-08 231-335-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J FREMONT MI
2007-05-08 231-366-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J FRUITPORT MI
2007-05-08 231-821-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J HOLTON MI
2007-05-08 231-828-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J TWIN LAKE MI
2007-04-20 231-668-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 TRAVERSECY MI
2007-04-19 231-855-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MUSKEGON MI
2007-04-12 231-224-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 FREMONT MI
2007-04-02 231-425-5XXX 5000–5999Assigned DAYSTARR LLC DBA DAYSTARR COMMUNICATIONS 993L LUDINGTON MI
2007-04-02 231-923-5XXX 5000–5999Assigned DAYSTARR LLC DBA DAYSTARR COMMUNICATIONS 993L HART MI
2007-03-27 231-394-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MOORESTOWN MI
2007-03-22 231-930-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 BEULAH MI
2007-03-12 231-276-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 INTERLOCHN MI
2007-02-19 231-354-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 CORAL MI
2007-02-13 231-360-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 TRAVERSECY MI
2007-02-13 231-855-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MUSKEGON MI
2007-02-09 231-468-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 CADILLAC MI
2007-02-08 231-237-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 CHARLEVOIX MI
2007-02-08 231-259-0XXX 0000–0999Assigned CHARTER IP ENABLED SERVICES, LLC 792K SHELBY MI
2007-02-06 231-736-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MUSKEGON MI
2007-02-06 231-760-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MUSKEGON MI
2007-01-25 231-322-3XXX 3000–3999Assigned CHARTER IP ENABLED SERVICES, LLC 792K TRCHRIVBDG MI
2007-01-25 231-331-5XXX 5000–5999Assigned CHARTER IP ENABLED SERVICES, LLC 792K ALDEN MI
2007-01-25 231-350-7XXX 7000–7999Assigned CHARTER IP ENABLED SERVICES, LLC 792K BELLAIRE 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.