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 909
LEVEL 3 COMMUNICATIONS, LLC - CA 187
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
2025-07-22 909-951-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 REDLANDS CA
2021-04-26 909-836-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 REDLANDS CA
2020-11-17 909-712-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 REDLANDS CA
2019-01-14 909-710-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ETIWANDA CA
2018-08-06 909-513-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ARROWHEAD CA
2018-08-02 909-698-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CRESTLINE CA
2018-03-08 909-789-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ONTARIO CA
2017-02-01 909-354-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ONTARIO CA
2016-07-26 909-413-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CHINO CA
2016-01-28 909-462-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 S BERNDINO CA
2015-08-25 909-696-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CHINO CA
2015-08-04 909-696-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CHINO CA
2014-12-22 909-654-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 REDLANDS CA
2014-11-25 909-665-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 S BERNDINO CA
2014-10-02 909-990-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 RIALTO CA
2014-09-19 909-637-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FONTANA CA
2014-09-16 909-572-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 COLTON CA
2014-06-02 909-443-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ONTARIO CA
2014-05-01 909-906-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ONTARIO CA
2014-04-14 909-493-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 UPLAND CA
2014-02-27 909-378-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 DIAMONDBAR CA
2014-01-10 909-453-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 S BERNDINO CA
2014-01-06 909-347-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FONTANA CA
2013-12-27 909-219-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 COLTON CA
2013-11-21 909-906-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ONTARIO CA
2013-11-07 909-326-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 POMONA CA
2013-10-08 909-906-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ONTARIO CA
2013-06-07 909-315-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CHINO CA
2013-03-06 909-361-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 S BERNDINO CA
2013-02-14 909-303-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 UPLAND CA
2012-08-08 909-340-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 BIGBEAR LK CA
2012-07-13 909-321-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ONTARIO CA
2012-07-13 909-575-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CLAREMONT CA
2012-06-12 909-281-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 BIGBEAR CY CA
2012-05-16 909-296-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 UPLAND CA
2012-05-09 909-927-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CHINO CA
2012-03-28 909-295-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ONTARIO CA
2012-02-10 909-726-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MARSHALL CA
2012-02-01 909-346-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FONTANA CA
2011-12-15 909-334-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CHINO CA
2011-11-04 909-538-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 POMONA CA
2011-10-27 909-333-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FONTANA CA
2011-10-05 909-666-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 RIALTO CA
2011-09-30 909-332-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 S BERNDINO CA
2011-09-12 909-726-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MARSHALL CA
2011-08-19 909-254-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 COLTON CA
2011-08-12 909-295-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ONTARIO CA
2011-08-05 909-283-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 REDLANDS CA
2011-08-05 909-667-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CLAREMONT CA
2011-03-25 909-203-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CHINO CA

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.