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
2007-09-05 608-316-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MADISON WI
2007-09-05 608-408-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 BRIGGSVL WI
2007-09-05 608-509-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MADISON WI
2007-09-05 608-630-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MADISON WI
2007-08-31 608-630-8XXX 8000–8999Assigned CHARTER IP ENABLED SERVICES, LLC 792K MADISON WI
2007-08-29 608-566-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PORTAGE WI
2007-07-31 608-738-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LA CROSSE WI
2007-07-31 608-738-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LA CROSSE WI
2007-07-30 608-403-1XXX 1000–1999Assigned UNITED STATES CELLULAR - WI 6274 ADAMS WI
2007-07-24 608-297-3XXX 3000–3999Assigned FRONTIER NORTH INC. - WI 0886 MONTELLO WI
2007-07-23 608-474-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ADAMS WI
2007-07-19 608-448-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BARABOO WI
2007-07-05 608-371-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 JANESVILLE WI
2007-07-05 608-630-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MADISON WI
2007-07-05 608-630-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MADISON WI
2007-06-21 608-554-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 JANESVILLE WI
2007-06-20 608-316-3XXX 3000–3999Assigned TDS METROCOM, LLC 520K MADISON WI
2007-06-20 608-316-4XXX 4000–4999Assigned TDS METROCOM, LLC 520K MADISON WI
2007-05-29 608-822-5XXX 5000–5999Assigned UNITED STATES CELLULAR - WI 6274 FENNIMORE WI
2007-05-21 608-312-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 BELOIT WI
2007-05-21 608-395-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 MADISON WI
2007-05-21 608-395-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 MADISON WI
2007-05-21 608-395-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 MADISON WI
2007-05-21 608-395-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 MADISON WI
2007-05-21 608-395-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 MADISON WI
2007-05-21 608-395-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MADISON WI
2007-05-15 608-322-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 JANESVILLE WI
2007-05-15 608-630-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MADISON WI
2007-05-15 608-630-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MADISON WI
2007-05-03 608-497-4XXX 4000–4999Assigned MT. VERNON TEL. CO. 0917 VERONA WI
2007-04-27 608-395-6XXX 6000–6999Assigned TDS METROCOM, LLC 520K MADISON WI
2007-04-20 608-323-0XXX 0000–0999Assigned UNITED STATES CELLULAR - WI 6274 ARCADIA WI
2007-04-20 608-525-0XXX 0000–0999Assigned UNITED STATES CELLULAR - WI 6274 ETTRICK WI
2007-04-20 608-534-0XXX 0000–0999Assigned UNITED STATES CELLULAR - WI 6274 TREMPEALEU WI
2007-04-12 608-929-1XXX 1000–1999Assigned UNITED STATES CELLULAR - WI 6274 HIGHLAND WI
2007-04-05 608-819-8XXX 8000–8999Assigned CHARTER IP ENABLED SERVICES, LLC 792K MADISON WI
2007-04-03 608-842-0XXX 0000–0999Assigned CHARTER IP ENABLED SERVICES, LLC 792K DE FOREST WI
2007-03-30 608-635-5XXX 5000–5999Assigned UNITED STATES CELLULAR - WI 6274 POYNETTE WI
2007-03-29 608-723-9XXX 9000–9999Assigned UNITED STATES CELLULAR - WI 6274 LANCASTER WI
2007-03-28 608-383-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 RICHLD CTR WI
2007-03-23 608-340-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 BRIGGSVL WI
2007-03-23 608-350-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MAUSTON WI
2007-03-22 608-490-0XXX 0000–0999Assigned UNITED STATES CELLULAR - WI 6274 EVANSVILLE WI
2007-03-20 608-477-3XXX 3000–3999Assigned UNITED STATES CELLULAR - WI 6274 BARABOO WI
2007-03-19 608-906-1XXX 1000–1999Assigned TDS METROCOM, LLC 520K MADISON WI
2007-03-19 608-906-2XXX 2000–2999Assigned TDS METROCOM, LLC 520K MADISON WI
2007-03-19 608-906-3XXX 3000–3999Assigned TDS METROCOM, LLC 520K MADISON WI
2007-03-19 608-906-4XXX 4000–4999Assigned TDS METROCOM, LLC 520K MADISON WI
2007-03-19 608-906-5XXX 5000–5999Assigned TDS METROCOM, LLC 520K MADISON WI
2007-03-19 608-906-6XXX 6000–6999Assigned TDS METROCOM, LLC 520K MADISON 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.