NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

0 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, all time — NPA 608
LEVEL 3 COMMUNICATIONS, LLC - WI 191
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
2025-03-28 608-613-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 NEW LISBON WI
2025-02-04 608-218-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MADISON WI
2024-10-11 608-608-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MADISON WI
2024-08-22 608-418-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 ALMA WI
2024-08-22 608-560-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 NECEDAH WI
2024-06-12 608-994-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 BLOOMINGTN WI
2023-12-28 608-893-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MADISON WI
2023-10-24 608-893-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MADISON WI
2023-09-29 608-670-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MOUNTHOREB WI
2023-03-02 608-401-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MAZOMANIE WI
2023-02-17 608-523-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 BLANCHADVL WI
2023-02-09 608-502-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 EVANSVILLE WI
2023-02-08 608-506-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 WONEWOC WI
2023-02-08 608-805-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 REEDSBURG WI
2023-02-08 608-899-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 WOODMAN WI
2023-02-08 608-900-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 CATARACT WI
2023-02-03 608-551-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 BRODHEAD WI
2023-02-03 608-726-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 DARLINGTON WI
2023-02-02 608-696-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 SPARTA WI
2022-12-27 608-508-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 WESTFIELD WI
2022-12-16 608-485-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 BOSCOBEL WI
2022-12-16 608-885-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 LANCASTER WI
2022-11-08 608-529-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 CUBA CITY WI
2022-08-10 608-479-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 HILLSBORO WI
2022-07-14 608-601-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MCFARLAND WI
2022-07-14 608-997-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 WAUNAKEE WI
2022-05-10 608-621-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MADISON WI
2022-04-06 608-690-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MADISON WI
2022-02-01 608-499-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 HAZELGREEN WI
2022-02-01 608-690-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MADISON WI
2022-01-31 608-816-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 LA CROSSE WI
2022-01-25 608-619-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 COONVALLEY WI
2022-01-25 608-679-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 STODDARD WI
2021-11-05 608-810-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 PORTAGE WI
2021-04-15 608-710-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MADISON WI
2021-02-02 608-820-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MIDDLETON WI
2021-01-25 608-909-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 OREGON WI
2020-12-22 608-394-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 LA CROSSE WI
2020-11-17 608-668-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 LA CROSSE WI
2020-10-15 608-668-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 LA CROSSE WI
2020-09-15 608-484-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 GALESVILLE WI
2020-04-21 608-360-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 LOGANVILLE WI
2020-04-09 608-688-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 COTTAGEGRV WI
2020-04-07 608-330-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 PLATTEVL WI
2020-02-19 608-306-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 PRARIDCHIN WI
2020-01-16 608-540-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 HOLMEN WI
2020-01-07 608-710-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MADISON WI
2019-12-18 608-912-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 DE FOREST WI
2019-10-09 608-570-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 RICHLD CTR WI
2019-10-09 608-668-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 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.