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
2015-08-17 608-440-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 MADISON WI
2015-08-17 608-726-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 DARLINGTON WI
2015-08-13 608-447-1XXX 1000–1999Assigned UNITED STATES CELLULAR - WI 6274 BRODHEAD WI
2015-08-06 608-422-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MADISON WI
2015-08-04 608-598-0XXX 0000–0999Assigned UNITED STATES CELLULAR - WI 6274 MADISON WI
2015-08-03 608-286-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K MADISON WI
2015-07-30 608-881-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 LA CROSSE WI
2015-07-28 608-416-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MADISON WI
2015-07-14 608-352-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - WI 007F JANESVILLE WI
2015-07-02 608-643-9XXX 9000–9999Assigned UNITED STATES CELLULAR - WI 6274 SAUK CITY WI
2015-07-02 608-999-2XXX 2000–2999Assigned ONVOY, LLC - WI 225C MADISON WI
2015-07-02 608-999-3XXX 3000–3999Assigned ONVOY, LLC - WI 225C MADISON WI
2015-07-02 608-999-4XXX 4000–4999Assigned ONVOY, LLC - WI 225C MADISON WI
2015-07-02 608-999-5XXX 5000–5999Assigned ONVOY, LLC - WI 225C MADISON WI
2015-07-02 608-999-6XXX 6000–6999Assigned ONVOY, LLC - WI 225C MADISON WI
2015-07-02 608-999-7XXX 7000–7999Assigned ONVOY, LLC - WI 225C MADISON WI
2015-07-02 608-999-8XXX 8000–8999Assigned ONVOY, LLC - WI 225C MADISON WI
2015-06-24 608-285-9XXX 9000–9999Assigned CHARTER IP ENABLED SERVICES, LLC 792K MADISON WI
2015-06-19 608-881-6XXX 6000–6999Assigned CHARTER IP ENABLED SERVICES, LLC 792K LA CROSSE WI
2015-06-18 608-999-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MADISON WI
2015-06-18 608-999-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MADISON WI
2015-06-08 608-416-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MADISON WI
2015-05-29 608-713-9XXX 9000–9999Assigned PEERLESS NETWORK OF WISCONSIN, LLC - WI 227F BELOIT WI
2015-05-22 608-495-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 REEDSBURG WI
2015-05-20 608-416-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MADISON WI
2015-05-18 608-440-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MADISON WI
2015-05-18 608-881-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 LA CROSSE WI
2015-05-11 608-440-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MADISON WI
2015-05-11 608-881-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LA CROSSE WI
2015-05-11 608-881-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LA CROSSE WI
2015-04-30 608-977-5XXX 5000–5999Assigned WISCONSIN BELL INC 9327 MADISON WI
2015-04-30 608-977-6XXX 6000–6999Assigned WISCONSIN BELL INC 9327 MADISON WI
2015-04-30 608-977-7XXX 7000–7999Assigned WISCONSIN BELL INC 9327 MADISON WI
2015-04-30 608-977-8XXX 8000–8999Assigned WISCONSIN BELL INC 9327 MADISON WI
2015-04-30 608-977-9XXX 9000–9999Assigned WISCONSIN BELL INC 9327 MADISON WI
2015-04-17 608-497-6XXX 6000–6999Assigned MT. VERNON TEL. CO. 0917 VERONA WI
2015-04-16 608-402-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 BARABOO WI
2015-03-16 608-618-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - WI 007F EDGERTON WI
2015-03-16 608-618-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - WI 007F EDGERTON WI
2015-03-16 608-618-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - WI 007F EDGERTON WI
2015-03-02 608-318-6XXX 6000–6999Assigned CHARTER IP ENABLED SERVICES, LLC 792K SUNPRAIRIE WI
2015-02-20 608-440-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MADISON WI
2015-02-19 608-909-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WI 007F OREGON WI
2015-02-19 608-909-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - WI 007F OREGON WI
2015-02-19 608-999-9XXX 9000–9999Assigned ONVOY, LLC - WI 225C MADISON WI
2015-02-12 608-440-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - WI 007F MADISON WI
2015-02-12 608-440-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - WI 007F MADISON WI
2015-02-12 608-501-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - WI 007F STOUGHTON WI
2015-02-12 608-501-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - WI 007F STOUGHTON WI
2015-02-12 608-571-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - WI 007F 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.