NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

10 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 4
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
2017-07-03 608-319-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DODGEVILLE WI
2017-07-03 608-383-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 RICHLD CTR WI
2017-06-22 608-471-1XXX 1000–1999Assigned PEERLESS NETWORK OF WISCONSIN, LLC - WI 227F MADISON WI
2017-06-22 608-640-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MADISON WI
2017-06-21 608-530-5XXX 5000–5999Assigned CHARTER IP ENABLED SERVICES, LLC 792K JANESVILLE WI
2017-05-26 608-299-6XXX 6000–6999Assigned ONVOY, LLC - WI 225C BELOIT WI
2017-05-26 608-480-1XXX 1000–1999Assigned ONVOY, LLC - WI 225C STOUGHTON WI
2017-05-26 608-530-0XXX 0000–0999Assigned ONVOY, LLC - WI 225C JANESVILLE WI
2017-05-26 608-888-7XXX 7000–7999Assigned ONVOY, LLC - WI 225C MADISON WI
2017-05-25 608-800-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 MADISON WI
2017-05-22 608-405-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MADISON WI
2017-05-22 608-640-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MADISON WI
2017-05-10 608-405-8XXX 8000–8999Assigned PEERLESS NETWORK OF WISCONSIN, LLC - WI 227F MADISON WI
2017-05-05 608-478-5XXX 5000–5999Assigned TDS METROCOM, LLC 520K SUNPRAIRIE WI
2017-05-03 608-736-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - WI 007F EVANSVILLE WI
2017-05-03 608-736-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - WI 007F EVANSVILLE WI
2017-04-26 608-748-3XXX 3000–3999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J FAIRPLAY WI
2017-04-11 608-615-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 LA CROSSE WI
2017-04-11 608-748-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 FAIRPLAY WI
2017-04-10 608-404-4XXX 4000–4999Assigned METROPCS, INC. 5562 WISCONDLLS WI
2017-04-06 608-693-0XXX 0000–0999Assigned UNITED STATES CELLULAR - WI 6274 WESTBY WI
2017-04-05 608-530-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JANESVILLE WI
2017-04-05 608-530-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JANESVILLE WI
2017-04-05 608-530-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JANESVILLE WI
2017-03-17 608-606-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 VIROQUA WI
2017-03-13 608-396-2XXX 2000–2999Assigned UNITED STATES CELLULAR - WI 6274 MELROSE WI
2017-03-09 608-731-2XXX 2000–2999Assigned ONVOY, LLC - WI 225C WEST SALEM WI
2017-03-02 608-299-9XXX 9000–9999Assigned TELNYX LLC 073H BELOIT WI
2017-03-02 608-305-2XXX 2000–2999Assigned TELNYX LLC 073H JANESVILLE WI
2017-03-02 608-581-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 BARABOO WI
2017-02-27 608-405-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MADISON WI
2017-02-27 608-851-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MONROE WI
2017-02-24 608-405-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MADISON WI
2017-02-24 608-405-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MADISON WI
2017-02-13 608-409-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 ARCADIA WI
2017-01-30 608-618-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 EDGERTON WI
2017-01-23 608-841-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 MIDDLETON WI
2016-12-13 608-259-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MADISON WI
2016-12-12 608-863-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 ARCADIA WI
2016-12-08 608-341-5XXX 5000–5999Assigned UNITED STATES CELLULAR - WI 6274 DODGEVILLE WI
2016-12-08 608-405-1XXX 1000–1999Assigned TELNYX LLC 073H MADISON WI
2016-12-05 608-312-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BELOIT WI
2016-12-05 608-800-3XXX 3000–3999Assigned METROPCS, INC. 5562 MADISON WI
2016-12-05 608-800-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 MADISON WI
2016-11-21 608-898-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 JANESVILLE WI
2016-11-18 608-898-6XXX 6000–6999Assigned ONVOY, LLC - WI 225C JANESVILLE WI
2016-10-26 608-580-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MILTON WI
2016-10-14 608-497-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 VERONA WI
2016-10-14 608-573-2XXX 2000–2999Assigned UNITED STATES CELLULAR - WI 6274 POYNETTE WI
2016-10-12 608-800-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 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.