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 720
LEVEL 3 COMMUNICATIONS, LLC - CO 207
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
2026-01-29 720-997-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 BENNETT CO
2022-03-15 720-824-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 HUDSON CO
2022-01-25 720-814-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DEER TRAIL CO
2021-04-15 720-844-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DENVER CO
2021-03-17 720-844-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DENVER CO
2021-03-17 720-844-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DENVER CO
2021-02-16 720-844-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DENVER CO
2020-12-22 720-716-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DENVER CO
2020-08-27 720-790-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 ALLNSPKLYN CO
2020-08-19 720-752-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DENVER CO
2020-08-19 720-752-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DENVER CO
2020-08-19 720-752-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DENVER CO
2020-08-19 720-752-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DENVER CO
2020-08-19 720-752-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DENVER CO
2020-08-19 720-752-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DENVER CO
2020-08-19 720-752-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DENVER CO
2020-08-19 720-752-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DENVER CO
2020-08-19 720-752-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DENVER CO
2020-08-19 720-752-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DENVER CO
2020-06-17 720-672-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DENVER CO
2020-06-17 720-678-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DENVER CO
2020-04-07 720-716-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DENVER CO
2020-04-07 720-716-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DENVER CO
2020-03-25 720-716-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DENVER CO
2020-01-28 720-653-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DENVER CO
2019-12-04 720-687-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DENVER CO
2019-10-15 720-715-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DECKERS CO
2019-09-17 720-713-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 LONGMONT CO
2019-09-06 720-673-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DENVER CO
2019-09-06 720-673-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DENVER CO
2019-09-03 720-640-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 HUDSON CO
2019-09-03 720-826-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DENVER CO
2019-06-25 720-779-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DENVER CO
2019-05-22 720-738-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DENVER CO
2019-01-29 720-640-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 HUDSON CO
2019-01-07 720-731-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 LONGMONT CO
2017-09-08 720-815-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 LONGMONT CO
2017-08-18 720-676-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DENVER CO
2017-01-31 720-693-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DENVER CO
2016-05-10 720-595-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DENVER CO
2015-09-29 720-893-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 ALLNSPKLYN CO
2015-08-31 720-930-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DENVER CO
2015-08-25 720-643-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DENVER CO
2015-08-25 720-643-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DENVER CO
2015-08-25 720-643-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DENVER CO
2015-06-02 720-893-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 ALLNSPKLYN CO
2015-05-20 720-709-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DENVER CO
2015-04-20 720-745-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 LONGMONT CO
2015-04-14 720-410-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DENVER CO
2015-03-31 720-778-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DENVER CO

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.