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 813
LEVEL 3 COMMUNICATIONS, LLC - FL 196
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
2024-07-02 813-656-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPACEN FL
2024-07-02 813-656-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPACEN FL
2021-09-14 813-869-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPACEN FL
2021-08-27 813-834-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPACEN FL
2021-07-08 813-776-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPAWST FL
2021-06-29 813-705-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPACEN FL
2021-06-23 813-709-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPACEN FL
2021-04-12 813-776-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPAWST FL
2021-03-31 813-697-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPACEN FL
2020-11-04 813-692-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPACEN FL
2020-07-28 813-733-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPANTH FL
2020-07-22 813-582-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPACEN FL
2020-01-21 813-219-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPAWST FL
2020-01-21 813-565-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPAEST FL
2019-08-22 813-568-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPACEN FL
2019-07-17 813-560-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPACEN FL
2019-06-18 813-560-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPACEN FL
2019-05-31 813-565-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPAEST FL
2019-05-07 813-499-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPACEN FL
2019-03-01 813-556-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPACEN FL
2019-01-30 813-524-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPACEN FL
2018-11-20 813-462-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPACEN FL
2018-09-20 813-519-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPACEN FL
2018-07-31 813-467-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPACEN FL
2017-08-17 813-543-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPAWST FL
2017-07-18 813-437-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPACEN FL
2017-06-07 813-437-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPACEN FL
2017-04-05 813-392-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPACEN FL
2017-02-09 813-488-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPACEN FL
2016-12-06 813-981-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPACEN FL
2016-02-24 813-533-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPACEN FL
2016-01-12 813-940-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPACEN FL
2015-12-30 813-993-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPAEST FL
2015-09-16 813-255-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPACEN FL
2015-09-16 813-666-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPACEN FL
2015-06-09 813-682-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPACEN FL
2015-06-09 813-682-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPACEN FL
2015-03-23 813-867-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPACEN FL
2015-03-23 813-906-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPACEN FL
2015-02-18 813-603-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPAEST FL
2014-12-02 813-575-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPANTH FL
2014-11-19 813-473-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 PLANT CITY FL
2014-11-19 813-580-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPAWST FL
2014-11-19 813-815-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 ZEPHYRHILS FL
2014-09-25 813-327-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPACEN FL
2014-09-25 813-327-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPACEN FL
2014-09-25 813-603-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPAEST FL
2014-09-25 813-605-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPACEN FL
2014-09-11 813-327-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPACEN FL
2014-09-11 813-327-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPACEN FL

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.