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 480
LEVEL 3 COMMUNICATIONS, LLC - AZ 294
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
2022-12-01 480-856-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2022-04-22 480-856-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2022-04-22 480-856-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2022-04-12 480-741-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2022-04-12 480-790-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2022-03-29 480-863-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2022-03-29 480-863-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2022-03-29 480-863-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2022-02-25 480-896-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2022-02-25 480-896-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2022-02-16 480-790-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2022-02-16 480-790-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2022-02-16 480-790-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2022-02-16 480-790-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2021-12-29 480-847-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2021-12-29 480-847-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2021-11-24 480-764-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2021-11-24 480-764-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2021-11-24 480-764-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2021-11-24 480-764-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2021-07-21 480-746-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2021-07-21 480-746-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2021-07-21 480-746-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2021-07-21 480-746-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2021-06-30 480-746-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2021-06-30 480-746-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2021-06-30 480-746-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2021-06-30 480-746-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2021-06-10 480-791-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2021-05-20 480-803-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2021-05-20 480-803-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2021-03-10 480-761-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2021-03-10 480-761-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2021-03-10 480-761-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2020-11-19 480-674-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2020-11-19 480-674-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2020-11-19 480-674-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2020-10-21 480-801-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2020-10-21 480-801-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2020-08-11 480-697-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2020-08-11 480-697-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2020-08-11 480-697-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2020-08-11 480-697-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2020-05-19 480-691-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2020-05-12 480-597-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2020-03-31 480-618-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2020-03-31 480-618-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2020-03-31 480-618-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2020-03-31 480-618-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2020-01-08 480-576-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ

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.