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 570
LEVEL 3 COMMUNICATIONS, LLC - PA 250
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
2025-10-14 570-792-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 OVAL PA
2022-08-05 570-432-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 MONTROSE PA
2022-05-18 570-907-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 BEECHCREEK PA
2021-01-26 570-633-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 BENTON PA
2021-01-26 570-873-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 AVIS PA
2020-08-20 570-849-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 DANVILLE PA
2020-03-11 570-939-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 LEWISBURG PA
2019-12-17 570-571-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 WAYMART PA
2019-01-22 570-515-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 MONTGOMERY PA
2018-11-20 570-931-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 WILKSBARRE PA
2018-11-14 570-302-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 COVINGTON PA
2018-08-23 570-933-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 ASHLAND PA
2018-06-20 570-537-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 MILLERTON PA
2018-06-20 570-549-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 ROSEVILLE PA
2018-06-20 570-596-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 BENTLEYCRK PA
2018-03-29 570-358-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 ULSTER PA
2018-03-29 570-395-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 WARREN CTR PA
2018-03-29 570-530-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 ROME PA
2018-03-29 570-623-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 LITTLE MDW PA
2018-03-29 570-744-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 LE RAYSVL PA
2017-12-26 570-750-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 LAPORTE PA
2017-10-26 570-425-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 MANDATA PA
2017-10-26 570-626-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 TREVORTON PA
2017-09-28 570-569-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PITTSTON PA
2017-09-14 570-849-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 DANVILLE PA
2017-06-29 570-375-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 LAKEWOOD PA
2017-06-02 570-464-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 TURBOTVL PA
2017-06-02 570-652-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 TREMONT PA
2017-06-02 570-653-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 VALLEYVIEW PA
2017-05-18 570-583-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PORTLAND PA
2017-05-18 570-683-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 ORANGEVL PA
2017-05-18 570-791-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 WAPWALLOPN PA
2017-05-18 570-901-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 TRUCKSVL PA
2017-05-18 570-902-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 NANTICOKE PA
2017-04-27 570-271-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 DANVILLE PA
2017-04-12 570-381-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 SO CANAAN PA
2017-04-12 570-571-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 WAYMART PA
2017-04-10 570-308-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 MUNCY PA
2017-04-10 570-452-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 NORTHUBRLD PA
2017-04-10 570-678-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 NUANGOLA PA
2017-04-10 570-705-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 RINGTOWN PA
2017-04-05 570-217-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 MIFFLINBG PA
2017-04-05 570-246-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 MILTON PA
2017-04-05 570-276-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 GIRARDVL PA
2017-04-05 570-277-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 NEWPHLDLPH PA
2017-04-05 570-356-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 CATAWISSA PA
2017-04-05 570-403-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 MOUNTANTOP PA
2017-04-05 570-526-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 FREELAND PA
2017-04-05 570-554-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 MT CARMEL PA
2017-04-05 570-799-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 NUMIDIA PA

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.