NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

12 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 608
ONVOY, LLC - WI 6
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 4
NEW CINGULAR WIRELESS PCS, LLC - IL 1
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
2005-05-31 608-237-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J MADISON WI
2005-05-26 608-830-4XXX 4000–4999Assigned MID-PLAINS TEL., INC. 0881 MIDDLETON WI
2005-05-23 608-493-4XXX 4000–4999Assigned TDS METROCOM, LLC 520K MERRIMAC WI
2005-05-23 608-852-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MADISON WI
2005-05-19 608-310-4XXX 4000–4999Assigned TDS METROCOM, LLC 520K MADISON WI
2005-05-19 608-310-5XXX 5000–5999Assigned TDS METROCOM, LLC 520K MADISON WI
2005-05-03 608-563-4XXX 4000–4999Assigned CHARTER IP ENABLED SERVICES, LLC 792K JANESVILLE WI
2005-04-21 608-852-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MADISON WI
2005-04-21 608-852-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MADISON WI
2005-04-12 608-207-9XXX 9000–9999Assigned CHARTER IP ENABLED SERVICES, LLC 792K BELOIT WI
2005-04-05 608-852-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MADISON WI
2005-03-28 608-333-1XXX 1000–1999Assigned UNITED STATES CELLULAR - WI 6274 MADISON WI
2005-03-28 608-333-2XXX 2000–2999Assigned UNITED STATES CELLULAR - WI 6274 MADISON WI
2005-03-28 608-333-3XXX 3000–3999Assigned UNITED STATES CELLULAR - WI 6274 MADISON WI
2005-03-28 608-333-4XXX 4000–4999Assigned UNITED STATES CELLULAR - WI 6274 MADISON WI
2005-03-28 608-333-5XXX 5000–5999Assigned UNITED STATES CELLULAR - WI 6274 MADISON WI
2005-03-28 608-333-6XXX 6000–6999Assigned UNITED STATES CELLULAR - WI 6274 MADISON WI
2005-03-28 608-333-7XXX 7000–7999Assigned UNITED STATES CELLULAR - WI 6274 MADISON WI
2005-03-28 608-333-8XXX 8000–8999Assigned UNITED STATES CELLULAR - WI 6274 MADISON WI
2005-03-28 608-333-9XXX 9000–9999Assigned UNITED STATES CELLULAR - WI 6274 MADISON WI
2005-03-28 608-412-4XXX 4000–4999Assigned UNITED STATES CELLULAR - WI 6274 PRARIDCHIN WI
2005-03-17 608-588-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 SPG GREEN WI
2005-03-10 608-739-2XXX 2000–2999Assigned UNITED STATES CELLULAR - WI 6274 MUSCODA WI
2005-02-25 608-719-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 STOUGHTON WI
2005-02-23 608-359-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 JANESVILLE WI
2005-02-22 608-443-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 MADISON WI
2005-02-15 608-466-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 BELOIT WI
2005-02-14 608-318-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 SUNPRAIRIE WI
2005-02-14 608-588-4XXX 4000–4999Assigned UNITED STATES CELLULAR - WI 6274 SPG GREEN WI
2005-02-14 608-588-5XXX 5000–5999Assigned UNITED STATES CELLULAR - WI 6274 SPG GREEN WI
2005-02-14 608-884-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 EDGERTON WI
2005-02-07 608-467-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MADISON WI
2005-02-01 608-448-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 BARABOO WI
2005-02-01 608-567-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 TOMAH WI
2005-01-21 608-237-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J MADISON WI
2005-01-21 608-541-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J STOUGHTON WI
2005-01-21 608-852-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MADISON WI
2005-01-14 608-408-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 BRIGGSVL WI
2005-01-14 608-467-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MADISON WI
2005-01-05 608-403-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 ADAMS WI
2005-01-04 608-443-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MADISON WI
2005-01-04 608-498-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LA CROSSE WI
2005-01-03 608-312-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BELOIT WI
2004-12-22 608-370-6XXX 6000–6999Assigned CHARTER IP ENABLED SERVICES, LLC 792K SAUK CITY WI
2004-12-22 608-415-5XXX 5000–5999Assigned CHARTER IP ENABLED SERVICES, LLC 792K REEDSBURG WI
2004-12-22 608-566-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K PORTAGE WI
2004-12-13 608-448-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BARABOO WI
2004-12-09 608-541-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J STOUGHTON WI
2004-12-09 608-541-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J STOUGHTON WI
2004-12-09 608-541-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J STOUGHTON WI

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.