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 618
LEVEL 3 COMMUNICATIONS, LLC - IL 194
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
2025-10-31 618-871-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ALLENDALE IL
2025-09-22 618-742-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 MOUND CITY IL
2025-05-16 618-840-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 STAUNTON IL
2024-06-20 618-986-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 WATERLOO IL
2023-02-07 618-677-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 FAYETTEVL IL
2020-08-05 618-716-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 TRENTON IL
2020-05-28 618-577-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 BREESE IL
2019-05-15 618-320-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 OLNEY IL
2018-12-03 618-421-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ROBINSON IL
2018-09-21 618-893-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 COBDEN IL
2018-03-23 618-212-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 BELLEVILLE IL
2018-03-08 618-200-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 BENTON IL
2017-10-17 618-440-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 MARION IL
2017-08-21 618-270-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 WAYNE CITY IL
2017-08-21 618-378-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 NORRISCITY IL
2017-08-21 618-609-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 GRAYVILLE IL
2017-08-21 618-754-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 DUNDAS IL
2017-08-21 618-852-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 NEWTON IL
2017-08-21 618-963-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ENFIELD IL
2017-08-10 618-423-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 RAMSEY IL
2017-08-10 618-427-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 BROWNSTOWN IL
2017-08-09 618-295-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 MARISSA IL
2017-08-09 618-629-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 EWING IL
2017-08-01 618-445-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ALBION IL
2017-01-04 618-961-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 GLENCARBON IL
2016-08-19 618-440-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 MARION IL
2016-05-04 618-726-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 O FALLON IL
2016-04-28 618-300-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CARBONDALE IL
2016-03-29 618-942-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 HERRIN IL
2016-03-18 618-744-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 BELLEVILLE IL
2016-01-12 618-437-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 INA IL
2016-01-12 618-478-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 NEW MINDEN IL
2016-01-12 618-619-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ALTON IL
2015-12-30 618-703-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 GREENVILLE IL
2015-10-07 618-684-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 MURPHYSBO IL
2015-09-29 618-619-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ALTON IL
2015-07-30 618-803-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 COLLINSVL IL
2014-09-26 618-263-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 MT CARMEL IL
2014-09-26 618-560-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 COLLINSVL IL
2014-09-26 618-690-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 GREENVILLE IL
2014-04-16 618-508-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 FLORA IL
2014-01-29 618-944-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 MARION IL
2014-01-22 618-319-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CARBONDALE IL
2013-12-17 618-681-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CARTERVL IL
2013-08-28 618-202-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ANNA IL
2013-07-25 618-309-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 METROPOLIS IL
2013-07-02 618-364-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 MARION IL
2013-05-30 618-767-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 BELLEVILLE IL
2013-01-04 618-589-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 O FALLON IL
2012-11-30 618-816-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 MT VERNON IL

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.