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
2016-02-03 608-305-8XXX 8000–8999Assigned ONVOY, LLC - WI 225C JANESVILLE WI
2016-01-27 608-383-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 RICHLD CTR WI
2016-01-26 608-855-9XXX 9000–9999Assigned PEERLESS NETWORK OF WISCONSIN, LLC - WI 227F SPARTA WI
2016-01-25 608-591-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 LODI WI
2016-01-22 608-975-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 BELLEVILLE WI
2016-01-20 608-459-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 SPG GREEN WI
2016-01-20 608-580-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 MILTON WI
2016-01-20 608-655-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 MARSHALL WI
2016-01-20 608-909-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 OREGON WI
2016-01-14 608-885-0XXX 0000–0999Assigned UNITED STATES CELLULAR - WI 6274 LANCASTER WI
2016-01-08 608-236-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 MADISON WI
2016-01-08 608-598-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 MADISON WI
2016-01-08 608-598-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 MADISON WI
2015-12-31 608-371-1XXX 1000–1999Assigned PEERLESS NETWORK OF WISCONSIN, LLC - WI 227F JANESVILLE WI
2015-12-31 608-598-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MADISON WI
2015-12-28 608-685-9XXX 9000–9999Assigned COCHRANE COOP. TEL. CO. 0866 ALMA WI
2015-12-17 608-581-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BARABOO WI
2015-12-17 608-743-9XXX 9000–9999Assigned CHARTER IP ENABLED SERVICES, LLC 792K JANESVILLE WI
2015-12-15 608-495-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 REEDSBURG WI
2015-12-15 608-598-1XXX 1000–1999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MADISON WI
2015-12-15 608-598-2XXX 2000–2999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MADISON WI
2015-12-15 608-598-3XXX 3000–3999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MADISON WI
2015-12-15 608-598-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MADISON WI
2015-12-15 608-598-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MADISON WI
2015-12-15 608-598-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MADISON WI
2015-12-09 608-573-1XXX 1000–1999Assigned UNITED STATES CELLULAR - WI 6274 POYNETTE WI
2015-12-04 608-888-0XXX 0000–0999Assigned ONVOY, LLC - WI 225C MADISON WI
2015-12-04 608-888-1XXX 1000–1999Assigned ONVOY, LLC - WI 225C MADISON WI
2015-12-04 608-888-2XXX 2000–2999Assigned ONVOY, LLC - WI 225C MADISON WI
2015-12-02 608-567-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 TOMAH WI
2015-11-20 608-800-0XXX 0000–0999Assigned ONVOY, LLC - WI 225C MADISON WI
2015-11-20 608-800-8XXX 8000–8999Assigned ONVOY, LLC - WI 225C MADISON WI
2015-11-12 608-581-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 BARABOO WI
2015-11-10 608-352-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 JANESVILLE WI
2015-11-06 608-440-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MADISON WI
2015-10-29 608-888-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 MADISON WI
2015-10-22 608-977-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MADISON WI
2015-10-15 608-450-2XXX 2000–2999Assigned UNITED STATES CELLULAR - WI 6274 OXFORD WI
2015-10-09 608-501-4XXX 4000–4999Assigned UNITED STATES CELLULAR - WI 6274 STOUGHTON WI
2015-10-05 608-841-2XXX 2000–2999Assigned CHARTER IP ENABLED SERVICES, LLC 792K MIDDLETON WI
2015-10-01 608-987-8XXX 8000–8999Assigned PEERLESS NETWORK OF WISCONSIN, LLC - WI 227F MINERAL PT WI
2015-09-28 608-425-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 DODGEVILLE WI
2015-09-24 608-747-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MAUSTON WI
2015-09-11 608-632-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 WESTBY WI
2015-09-03 608-977-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MADISON WI
2015-09-03 608-977-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MADISON WI
2015-08-18 608-888-8XXX 8000–8999Assigned ONVOY, LLC - WI 225C MADISON WI
2015-08-18 608-888-9XXX 9000–9999Assigned ONVOY, LLC - WI 225C MADISON WI
2015-08-17 608-440-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 MADISON WI
2015-08-17 608-440-4XXX 4000–4999Assigned 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.