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 779
LEVEL 3 COMMUNICATIONS, LLC - IL 56
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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2023-02-10 779-286-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 SPRING GRV IL
2022-11-09 779-291-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 WONDERLAKE IL
2022-10-21 779-262-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 OGLESBY IL
2022-10-12 779-269-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ROCKFORD IL
2022-10-05 779-778-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 WINNEBAGO IL
2022-04-12 779-345-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 BYRON IL
2022-03-31 779-353-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 FORRESTON IL
2022-03-31 779-354-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 DAVIS IL
2022-03-31 779-355-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 HARMON IL
2022-03-24 779-332-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 DURAND IL
2022-03-24 779-344-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 SEWARD IL
2022-03-24 779-722-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ASHTON IL
2022-01-31 779-347-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 WINSLOW IL
2022-01-31 779-729-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 LENA IL
2021-08-24 779-293-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 NEW LENOX IL
2021-07-29 779-266-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 LANARK IL
2021-05-26 779-289-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 SO BELOIT IL
2020-11-13 779-249-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 DWIGHT IL
2020-11-05 779-334-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 DE KALB IL
2020-11-05 779-334-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 DE KALB IL
2020-11-05 779-334-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 DE KALB IL
2020-11-05 779-334-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 DE KALB IL
2020-11-05 779-334-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 DE KALB IL
2020-11-05 779-334-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 DE KALB IL
2020-11-05 779-334-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 DE KALB IL
2020-11-05 779-334-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 DE KALB IL
2020-08-13 779-277-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 FLANAGAN IL
2020-05-04 779-251-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 DIXON IL
2020-04-27 779-382-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 GENOA IL
2019-10-09 779-265-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 MCHENRY IL
2018-11-14 779-222-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 SYCAMORE IL
2016-04-28 779-513-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ROCKFORD IL
2016-03-03 779-254-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 FRANKFORT IL
2016-03-03 779-254-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 FRANKFORT IL
2016-03-03 779-254-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 FRANKFORT IL
2015-07-30 779-208-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ROCKFORD IL
2015-06-17 779-888-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ROCKFORD IL
2015-05-20 779-227-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 JOLIET IL
2014-01-09 779-203-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ROCKFORD IL
2013-10-18 779-222-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 SYCAMORE IL
2012-10-17 779-203-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ROCKFORD IL
2012-08-09 779-232-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 WILMINGTON IL
2012-05-16 779-774-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ROCKFORD IL
2012-02-15 779-548-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 MARENGO IL
2011-10-28 779-379-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 JOLIET IL
2011-10-12 779-232-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 WILMINGTON IL
2011-09-21 779-368-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 NEWMILFORD IL
2011-03-04 779-548-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 MARENGO IL
2011-02-24 779-545-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 MT MORRIS IL
2011-02-17 779-200-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ROCKFORD IL

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.