NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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 567
LEVEL 3 COMMUNICATIONS, LLC - OH 122
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
2024-10-29 567-441-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 LIMA OH
2024-10-29 567-441-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 LIMA OH
2024-10-29 567-441-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 LIMA OH
2024-10-29 567-441-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 LIMA OH
2024-09-25 567-440-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 TOLEDO OH
2024-06-12 567-440-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 TOLEDO OH
2024-06-03 567-319-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 WAPAKONETA OH
2023-06-13 567-666-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 TOLEDO OH
2023-03-22 567-666-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 TOLEDO OH
2023-03-09 567-482-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 WOODVILLE OH
2023-03-09 567-487-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 GREEN SPG OH
2023-03-09 567-639-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 RCFLDCTBRY OH
2023-03-07 567-456-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 PERRYSBURG OH
2023-02-01 567-808-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 PAULDING OH
2022-09-27 567-600-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 TOLEDO OH
2022-03-22 567-304-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 TOLEDO OH
2021-10-28 567-599-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 GENOA OH
2021-08-23 567-236-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 ELMORE OH
2021-04-30 567-287-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 DELTA OH
2018-09-05 567-430-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BUTLER OH
2018-09-05 567-483-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 LUCAS OH
2018-08-23 567-978-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 JOHNSVILLE OH
2018-08-02 567-381-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 LEXINGTON OH
2018-07-26 567-345-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MANSFIELD OH
2017-05-09 567-290-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 TOLEDO OH
2017-05-01 567-286-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 ST MARYS OH
2017-02-07 567-970-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 TOLEDO OH
2017-02-01 567-970-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 TOLEDO OH
2015-12-23 567-806-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 TOLEDO OH
2015-07-15 567-806-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 TOLEDO OH
2015-06-08 567-309-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MANSFIELD OH
2015-06-08 567-309-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MANSFIELD OH
2015-06-08 567-309-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MANSFIELD OH
2015-06-08 567-309-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MANSFIELD OH
2015-06-08 567-309-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MANSFIELD OH
2015-06-08 567-309-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MANSFIELD OH
2014-10-24 567-806-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 TOLEDO OH
2014-09-12 567-242-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 LIMA OH
2014-05-28 567-241-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MANSFIELD OH
2014-03-24 567-843-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 STRYKER OH
2014-01-16 567-763-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 SHILOH OH
2013-10-30 567-324-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 ROCKFORD OH
2013-09-25 567-320-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 LAFAYETTE OH
2013-09-25 567-802-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 GOMER OH
2013-09-23 567-323-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 ADARIO OH
2013-09-16 567-229-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 DUNKIRK OH
2013-09-16 567-364-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 WESTMINSTR OH
2013-09-16 567-749-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BEAVERDAM OH
2013-08-22 567-316-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 TOLEDO OH
2013-08-12 567-302-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MAUMEE OH

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.