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 320
LEVEL 3 COMMUNICATIONS, LLC - MN 86
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
2025-01-17 320-206-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 RICHMOND MN
2024-02-26 320-393-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 RICE MN
2023-02-13 320-329-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 RENVILLE MN
2023-02-01 320-343-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 CLINTON MN
2023-02-01 320-389-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 BUFFALO LK MN
2023-02-01 320-408-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 PLATO MN
2023-02-01 320-427-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 BEARDSLEY MN
2023-02-01 320-449-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 PIERZ MN
2023-02-01 320-457-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 VILLARD MN
2023-02-01 320-461-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 BROWERVL MN
2023-02-01 320-562-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 STEWART MN
2023-02-01 320-613-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 LESTERPRRI MN
2023-02-01 320-657-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 GRACEVILLE MN
2023-02-01 320-753-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 SILVERLAKE MN
2023-02-01 320-832-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 BROWNTON MN
2023-02-01 320-887-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 BENSON MN
2022-12-27 320-422-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 WHEATON MN
2022-08-04 320-430-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 ANNANDALE MN
2022-01-28 320-900-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 CLEARWATER MN
2021-03-23 320-636-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 SOUTHHAVEN MN
2021-03-10 320-340-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 PAYNESVL MN
2020-11-13 320-347-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 NEW LONDON MN
2020-11-13 320-399-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 IRVING MN
2020-11-13 320-409-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 SPICER MN
2020-10-26 320-415-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 MELROSE MN
2020-03-20 320-398-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 KIMBALL MN
2020-03-20 320-453-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 EDENVALLEY MN
2020-03-20 320-764-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 WATKINS MN
2020-02-18 320-405-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 HUTCHINSON MN
2018-09-26 320-840-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 ALBANY MN
2017-12-06 320-378-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 HERMAN MN
2017-06-07 320-319-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 CLEAR LAKE MN
2017-05-18 320-344-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 HECTOR MN
2017-05-18 320-362-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 MILACA MN
2017-05-18 320-853-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 MADISON MN
2015-07-28 320-316-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 ST CLOUD MN
2015-07-28 320-316-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 ST CLOUD MN
2015-01-13 320-242-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 CLOVERTON MN
2014-12-18 320-372-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 SANDSTONE MN
2014-08-06 320-412-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 LITTLE FLS MN
2014-02-27 320-345-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 ST CLOUD MN
2013-08-28 320-317-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 OGILVIE MN
2012-05-07 320-495-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 WAHKON MN
2012-04-30 320-525-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 GARRISON MN
2012-01-30 320-429-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 SAUKCENTRE MN
2012-01-30 320-818-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 FOLEY MN
2011-04-28 320-537-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 ISLE MN
2011-04-28 320-738-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 ONAMIA MN
2008-05-08 320-262-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 WILLMAR MN
2008-04-16 320-626-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MN 5256 DASSEL MN

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.