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
2014-02-17 608-455-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WI 007F BROOKLYN WI
2014-02-17 608-468-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K FOUNTAINCY WI
2014-02-04 608-432-6XXX 6000–6999Assigned UNITED STATES CELLULAR - WI 6274 WISCONDLLS WI
2014-02-04 608-635-6XXX 6000–6999Assigned UNITED STATES CELLULAR - WI 6274 POYNETTE WI
2014-01-10 608-654-8XXX 8000–8999Assigned VERNON COMMUNICATIONS COOPERATIVE 717E CASHTON WI
2013-12-31 608-844-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 WISCONDLLS WI
2013-11-22 608-501-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WI 007F STOUGHTON WI
2013-11-22 608-501-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - WI 007F STOUGHTON WI
2013-11-22 608-579-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - WI 007F MCFARLAND WI
2013-11-20 608-399-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HOLMEN WI
2013-11-20 608-501-8XXX 8000–8999Assigned UNITED STATES CELLULAR - WI 6274 STOUGHTON WI
2013-11-18 608-572-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MADISON WI
2013-11-18 608-572-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MADISON WI
2013-11-18 608-572-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MADISON WI
2013-11-18 608-572-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MADISON WI
2013-11-15 608-519-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 LA CROSSE WI
2013-11-12 608-709-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MADISON WI
2013-11-08 608-381-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MADISON WI
2013-11-08 608-381-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MADISON WI
2013-11-06 608-709-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MADISON WI
2013-10-15 608-563-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 JANESVILLE WI
2013-10-15 608-563-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 JANESVILLE WI
2013-10-10 608-563-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J JANESVILLE WI
2013-10-04 608-518-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 LA CROSSE WI
2013-10-03 608-247-9XXX 9000–9999Assigned UNITED STATES CELLULAR - WI 6274 JANESVILLE WI
2013-10-03 608-535-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MADISON WI
2013-09-24 608-864-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 BLAIR WI
2013-09-20 608-402-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 BARABOO WI
2013-09-20 608-451-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 BANGOR WI
2013-09-17 608-421-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 MADISON WI
2013-09-17 608-421-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 MADISON WI
2013-09-17 608-421-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MADISON WI
2013-09-06 608-709-5XXX 5000–5999Assigned CHARTER IP ENABLED SERVICES, LLC 792K MADISON WI
2013-09-05 608-482-5XXX 5000–5999Assigned UNITED STATES CELLULAR - WI 6274 DARLINGTON WI
2013-08-26 608-924-7XXX 7000–7999Assigned MH TELECOM, INC. - WI 3043 RIDGEWAY WI
2013-08-23 608-419-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 PACKWAUKEE WI
2013-08-23 608-613-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 NEW LISBON WI
2013-08-23 608-729-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MADISON WI
2013-08-20 608-421-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 MADISON WI
2013-08-20 608-421-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 MADISON WI
2013-08-14 608-297-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MONTELLO WI
2013-08-14 608-339-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 ADAMS WI
2013-08-14 608-350-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MAUSTON WI
2013-08-13 608-709-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MADISON WI
2013-07-25 608-433-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LA CROSSE WI
2013-07-24 608-421-5XXX 5000–5999Assigned LEVEL 3 TELECOM OF WISCONSIN, LP - WI 7322 MADISON WI
2013-07-22 608-473-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BELOIT WI
2013-07-22 608-473-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BELOIT WI
2013-07-16 608-535-7XXX 7000–7999Assigned UNITED STATES CELLULAR - WI 6274 MADISON WI
2013-07-09 608-421-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 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.