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 920
LEVEL 3 COMMUNICATIONS, LLC - WI 166
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
2026-08-04 920-571-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MANITOWOC WI
2025-11-05 920-652-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MANITOWOC WI
2024-08-26 920-300-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 CLEVELAND WI
2024-05-30 920-873-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 GREEN BAY WI
2023-06-20 920-414-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 NEENAH WI
2023-03-22 920-641-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 GREEN BAY WI
2023-02-13 920-990-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 RIPON WI
2023-02-09 920-861-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 WINNECONNE WI
2022-12-16 920-595-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 SEYMOUR WI
2022-12-06 920-760-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 APPLETON WI
2022-11-18 920-565-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 HOWARDSGRV WI
2022-05-02 920-409-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 JOHNSONCRK WI
2022-04-05 920-503-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 PULASKI WI
2022-03-04 920-607-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 CAMPBELSPT WI
2022-02-11 920-953-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 VALDERS WI
2021-06-28 920-668-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 CEDARGROVE WI
2021-05-08 920-601-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 WRIGHTSTN WI
2020-07-22 920-305-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 GREEN BAY WI
2020-07-14 920-808-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 OSHKOSH WI
2020-06-04 920-441-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 APPLETON WI
2020-05-19 920-377-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 SHEBOYGAN WI
2020-03-11 920-930-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 GREEN BAY WI
2019-12-26 920-297-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 LAKE MILLS WI
2019-12-17 920-694-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 SHEBOYGAN WI
2019-12-12 920-581-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 FONDDU LAC WI
2019-02-20 920-502-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 NEENAH WI
2019-02-20 920-502-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 NEENAH WI
2019-02-20 920-502-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 NEENAH WI
2019-02-20 920-502-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 NEENAH WI
2019-01-22 920-516-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 OCONTO WI
2018-10-25 920-441-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 APPLETON WI
2018-09-12 920-618-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 SURING WI
2018-09-12 920-672-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 LENA WI
2018-09-12 920-855-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 GILLETT WI
2018-09-12 920-897-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 COLEMAN WI
2018-09-07 920-671-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 OCONTO FLS WI
2018-04-18 920-442-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 APPLETON WI
2016-11-22 920-666-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 APPLETON WI
2016-04-13 920-269-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 LOMIRA WI
2016-03-29 920-521-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 NEENAH WI
2015-10-01 920-891-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 OSHKOSH WI
2015-08-07 920-570-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 APPLETON WI
2014-12-02 920-289-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 PICKETT WI
2014-12-02 920-463-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 RANDOLPH WI
2014-12-02 920-614-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 RIO WI
2014-12-02 920-852-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 ROSENDALE WI
2014-11-26 920-282-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 CAMBRIA WI
2014-11-26 920-394-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 KINGSTON WI
2014-11-26 920-520-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 FOX LAKE WI
2014-11-26 920-709-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 JUNEAU 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.