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 740
LEVEL 3 COMMUNICATIONS, LLC - OH 180
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
2024-03-05 740-884-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 RICHMONDL OH
2024-02-01 740-626-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BOURNEVL OH
2024-02-01 740-634-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BAINBDG OH
2024-02-01 740-642-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 KINGSTON OH
2024-02-01 740-655-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 HALLSVILLE OH
2024-02-01 740-770-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 FRANKFORT OH
2024-02-01 740-887-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 LONDONDRRY OH
2024-02-01 740-940-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MASSIEVL OH
2024-02-01 740-993-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLARKSBURG OH
2022-08-11 740-672-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CHILLICOTH OH
2021-06-18 740-930-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CIRCLEVL OH
2021-05-25 740-752-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 GLENFORD OH
2021-02-05 740-805-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 GLOUSTER OH
2020-12-07 740-880-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 GRANVILLE OH
2020-12-03 740-736-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MARION OH
2020-07-30 740-484-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BETHESDA OH
2020-02-28 740-672-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CHILLICOTH OH
2020-02-19 740-447-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 ATHENS OH
2019-09-26 740-234-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 HOPEDALE OH
2019-05-30 740-402-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CONESVILLE OH
2019-03-28 740-782-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MORRISTOWN OH
2018-08-06 740-736-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MARION OH
2018-08-06 740-748-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 FREDERCKTN OH
2018-08-03 740-494-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 PROSPECT OH
2018-08-02 740-726-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 WALDO OH
2018-01-23 740-544-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 KNOXVILLE OH
2018-01-23 740-733-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 SMITHFIELD OH
2017-09-28 740-672-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CHILLICOTH OH
2017-08-30 740-618-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 NEWARK OH
2016-09-20 740-921-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BELLAIRE OH
2016-05-04 740-737-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 NELSONVL OH
2015-12-09 740-370-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 PORTSMOUTH OH
2014-10-01 740-251-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MARION OH
2014-09-02 740-951-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 PATASKALA OH
2014-06-10 740-493-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 IDAHO OH
2014-06-10 740-765-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 RICHMOND OH
2014-06-10 740-946-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 JEWETT OH
2014-06-09 740-546-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 ADENA OH
2014-06-09 740-658-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 FREEPORT OH
2014-06-09 740-677-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 THE PLAINS OH
2014-06-09 740-769-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 DLVLMTPLNT OH
2014-06-09 740-861-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CHESAPEAKE OH
2014-06-09 740-968-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 FLUSHING OH
2014-06-06 740-486-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MCARTHUR OH
2014-06-06 740-738-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MARTISFRRY OH
2014-06-06 740-854-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 ALBANY OH
2014-06-05 740-309-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BARNESVL OH
2014-06-05 740-419-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MILLEDGEVL OH
2014-05-07 740-688-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 JACKSON OH
2014-01-17 740-791-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MARTINSBG OH

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.