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
2012-05-22 608-286-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 MADISON WI
2012-05-02 608-850-7XXX 7000–7999Assigned CHARTER IP ENABLED SERVICES, LLC 792K WAUNAKEE WI
2012-05-01 608-399-3XXX 3000–3999Assigned CHARTER IP ENABLED SERVICES, LLC 792K HOLMEN WI
2012-05-01 608-839-6XXX 6000–6999Assigned CHARTER IP ENABLED SERVICES, LLC 792K COTTAGEGRV WI
2012-04-09 608-286-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MADISON WI
2012-03-30 608-304-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 LA CROSSE WI
2012-03-30 608-839-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - WI 007F COTTAGEGRV WI
2012-03-19 608-208-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 JANESVILLE WI
2012-02-28 608-475-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 RICHLD CTR WI
2012-02-27 608-402-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 BARABOO WI
2012-02-07 608-678-4XXX 4000–4999Assigned ONVOY, LLC - WI 225C WISCONDLLS WI
2012-02-07 608-678-6XXX 6000–6999Assigned ONVOY, LLC - WI 225C WISCONDLLS WI
2012-02-07 608-727-7XXX 7000–7999Assigned ONVOY, LLC - WI 225C LOGANVILLE WI
2012-02-07 608-986-7XXX 7000–7999Assigned ONVOY, LLC - WI 225C LIME RIDGE WI
2012-02-01 608-203-9XXX 9000–9999Assigned CHARTER IP ENABLED SERVICES, LLC 792K MIDDLETON WI
2012-01-13 608-208-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 JANESVILLE WI
2011-12-28 608-424-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - WI 007F BELLEVILLE WI
2011-12-28 608-490-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - WI 007F EVANSVILLE WI
2011-12-16 608-678-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 WISCONDLLS WI
2011-12-16 608-719-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 STOUGHTON WI
2011-12-08 608-713-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 BELOIT WI
2011-12-08 608-879-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WI 007F ORFORDVL WI
2011-12-05 608-719-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C STOUGHTON WI
2011-12-02 608-351-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 WEST SALEM WI
2011-12-02 608-535-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 MADISON WI
2011-11-10 608-415-9XXX 9000–9999Assigned UNITED STATES CELLULAR - WI 6274 REEDSBURG WI
2011-11-10 608-478-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 SUNPRAIRIE WI
2011-11-02 608-745-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 PORTAGE WI
2011-11-01 608-338-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MADISON WI
2011-11-01 608-338-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MADISON WI
2011-10-28 608-519-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 LA CROSSE WI
2011-10-27 608-897-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - WI 007F BRODHEAD WI
2011-10-24 608-298-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 MADISON WI
2011-10-24 608-433-6XXX 6000–6999Assigned METROPCS, INC. 5562 LA CROSSE WI
2011-10-14 608-497-9XXX 9000–9999Assigned MT. VERNON TEL. CO. 0917 VERONA WI
2011-09-30 608-403-7XXX 7000–7999Assigned UNITED STATES CELLULAR - WI 6274 ADAMS WI
2011-09-30 608-535-2XXX 2000–2999Assigned UNITED STATES CELLULAR - WI 6274 MADISON WI
2011-09-28 608-298-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MADISON WI
2011-09-23 608-287-5XXX 5000–5999Assigned WISCONSIN BELL INC 9327 MADISON WI
2011-09-23 608-381-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MADISON WI
2011-09-15 608-247-7XXX 7000–7999Assigned UNITED STATES CELLULAR - WI 6274 JANESVILLE WI
2011-09-13 608-291-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - WI 007F OREGON WI
2011-09-02 608-676-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WI 007F CLINTON WI
2011-09-02 608-764-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WI 007F DEERFIELD WI
2011-08-31 608-302-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JANESVILLE WI
2011-08-31 608-844-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 WISCONDLLS WI
2011-08-31 608-863-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 ARCADIA WI
2011-08-26 608-369-4XXX 4000–4999Assigned UNITED STATES CELLULAR - WI 6274 WESTFIELD WI
2011-08-26 608-606-6XXX 6000–6999Assigned UNITED STATES CELLULAR - WI 6274 VIROQUA WI
2011-08-23 608-406-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 LA CROSSE 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.