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 205
LEVEL 3 COMMUNICATIONS, LLC - AL 198
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
2024-01-03 205-840-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 ALABASTER AL
2022-11-09 205-840-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 ALABASTER AL
2022-09-20 205-460-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 BIRMINGHAM AL
2021-07-27 205-961-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 BIRMINGHAM AL
2020-09-09 205-974-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 ALABASTER AL
2020-08-25 205-771-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 TUSCALOOSA AL
2020-08-17 205-946-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 BIRMINGHAM AL
2020-08-10 205-974-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 ALABASTER AL
2020-06-18 205-634-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 WINFIELD AL
2020-06-09 205-974-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 ALABASTER AL
2020-04-20 205-952-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 HAMILTON AL
2020-04-14 205-850-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 WARRIOR AL
2020-01-14 205-360-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 ODENVILLE AL
2019-11-06 205-729-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 ALABASTER AL
2019-10-08 205-761-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 BIRMINGHAM AL
2019-06-25 205-729-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 ALABASTER AL
2019-06-25 205-829-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 BIRMINGHAM AL
2019-04-15 205-729-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 ALABASTER AL
2019-02-05 205-367-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 CARROLLTON AL
2019-01-23 205-431-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 VERNON AL
2018-11-14 205-762-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 ASHVILLE AL
2018-03-26 205-596-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 KENNEDY AL
2018-03-26 205-662-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 MILLPORT AL
2018-01-24 205-709-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 BIRMINGHAM AL
2017-11-01 205-594-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 ASHVILLE AL
2017-09-22 205-303-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 FAYETTE AL
2017-09-22 205-779-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 ALICEVILLE AL
2017-08-29 205-878-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 JASPER AL
2017-07-17 205-537-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 TRUSSVILLE AL
2016-12-07 205-847-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 BIRMINGHAM AL
2016-12-07 205-847-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 BIRMINGHAM AL
2016-12-07 205-847-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 BIRMINGHAM AL
2016-12-07 205-847-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 BIRMINGHAM AL
2016-09-22 205-814-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 PELL CITY AL
2016-07-26 205-649-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 DORA AL
2016-06-02 205-710-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 TUSCALOOSA AL
2016-06-01 205-730-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 BIRMINGHAM AL
2016-02-23 205-548-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 LINCOLN AL
2016-01-20 205-216-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 ALABASTER AL
2015-12-30 205-730-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 BIRMINGHAM AL
2015-11-24 205-327-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 BIRMINGHAM AL
2015-09-30 205-773-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 LEEDS AL
2015-09-23 205-803-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 BIRMINGHAM AL
2015-08-05 205-438-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 BIRMINGHAM AL
2015-08-05 205-453-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 BIRMINGHAM AL
2015-07-23 205-725-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 BIRMINGHAM AL
2015-06-23 205-725-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 BIRMINGHAM AL
2015-04-28 205-650-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 TUSCALOOSA AL
2015-02-19 205-419-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 ALABASTER AL
2014-09-24 205-510-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 BIRMINGHAM AL

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.