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 970
LEVEL 3 COMMUNICATIONS, LLC - CO 145
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
2026-05-12 970-345-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 AKRON CO
2025-01-16 970-854-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 HOLYOKE CO
2023-07-13 970-525-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 PAONIA CO
2023-02-28 970-441-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 FORTMORGAN CO
2023-02-13 970-853-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 GYPSUM CO
2023-02-09 970-543-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 MESA CO
2023-02-09 970-563-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 IGNACIO CO
2023-02-09 970-582-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 PAGOSA SPG CO
2023-02-09 970-651-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 MAYBELL CO
2023-02-09 970-733-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DOLORES CO
2023-02-09 970-738-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 NORWOOD CO
2023-02-09 970-809-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 RDFTHERLKS CO
2023-02-09 970-838-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 WALDEN CO
2023-02-09 970-843-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 ALLISON CO
2023-02-09 970-877-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 LAKE CITY CO
2023-02-09 970-933-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DINOSAUR CO
2023-02-09 970-992-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DOVE CREEK CO
2023-02-09 970-993-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 MARVEL CO
2023-02-09 970-998-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 MCCOY CO
2022-12-28 970-645-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 WELDONA CO
2022-12-13 970-638-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 YAMPA CO
2022-12-13 970-647-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 JULESBURG CO
2022-12-13 970-659-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 HILLROSE CO
2022-12-13 970-709-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 GRAND LAKE CO
2022-12-13 970-727-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 CRESTEDBTE CO
2022-12-13 970-839-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 SILT CO
2022-12-13 970-868-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 HTSLPHRSPG CO
2022-12-13 970-890-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 OAK CREEK CO
2022-12-13 970-997-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 KREMMLING CO
2021-10-22 970-671-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 COLLBRAN CO
2020-12-30 970-816-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 CORTEZ CO
2020-12-21 970-855-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 EDWARDS CO
2020-10-08 970-771-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 BRECKENRDG CO
2020-05-12 970-666-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 FT COLLINS CO
2020-05-05 970-977-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 VAIL CO
2020-01-23 970-966-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 LOVELAND CO
2020-01-14 970-730-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 GRAND JCT CO
2020-01-07 970-909-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 GREELEY CO
2019-12-12 970-732-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 FT COLLINS CO
2018-08-14 970-432-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 EAGLE CO
2017-10-02 970-592-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 WRAY CO
2017-08-09 970-693-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 MEEKER CO
2016-12-13 970-572-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 RANGELY CO
2015-12-30 970-852-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 GRAND JCT CO
2015-09-10 970-360-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 YUMA CO
2015-09-10 970-469-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 OTIS CO
2015-09-08 970-514-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 AKRON CO
2015-02-10 970-665-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 RIFLE CO
2012-12-14 970-455-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DILLON CO
2012-10-18 970-300-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CO 6118 ASPEN CO

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.