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 315
LEVEL 3 COMMUNICATIONS, LLC - NY 208
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
2026-08-12 315-505-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 CICERO NY
2020-12-23 315-978-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 CENTRAL SQ NY
2020-02-05 315-815-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 CAZENOVIA NY
2019-08-28 315-847-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 PALMYRA NY
2018-11-28 315-973-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 CLAYTON NY
2017-12-06 315-927-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 UTICA NY
2017-10-23 315-494-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 MARCELLUS NY
2017-01-31 315-960-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 SYRACUSE NY
2016-11-16 315-750-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 HAMILTON NY
2015-11-20 315-930-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 SYRACUSE NY
2015-09-04 315-274-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 POTSDAM NY
2015-09-04 315-812-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 SODUS NY
2015-07-23 315-930-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 SYRACUSE NY
2015-07-15 315-883-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 SYRACUSE NY
2014-10-16 315-203-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 ADAMS NY
2014-10-16 315-205-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 REMSEN NY
2014-10-16 315-305-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 BRANCHPORT NY
2014-10-16 315-353-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 NORWOOD NY
2014-10-16 315-354-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 RAQUETTELK NY
2014-10-16 315-375-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 MORRISTOWN NY
2014-10-16 315-379-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 CANTON NY
2014-10-16 315-384-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 NORFOLK NY
2014-10-16 315-387-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 SANDYCREEK NY
2014-10-16 315-509-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 PULASKI NY
2014-10-16 315-522-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 GOUVERNEUR NY
2014-10-16 315-531-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 PENN YAN NY
2014-10-16 315-587-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 NORTH ROSE NY
2014-10-16 315-659-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 ANTWERP NY
2014-10-16 315-662-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 NEWWDSTOCK NY
2014-10-16 315-667-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 MARION NY
2014-10-16 315-678-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 LYSANDER NY
2014-10-16 315-691-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 EARLVILLE NY
2014-10-16 315-754-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 RED CREEK NY
2014-10-16 315-813-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 SYLVAN BCH NY
2014-10-16 315-837-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 GEORGETOWN NY
2014-10-16 315-852-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 DE RUYTER NY
2014-10-16 315-855-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 LEONARDSVL NY
2014-10-16 315-874-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 LOWVILLE NY
2014-10-16 315-923-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 CLYDE NY
2014-10-16 315-947-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 FAIR HAVEN NY
2014-07-02 315-930-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 SYRACUSE NY
2013-11-26 315-802-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 SYRACUSE NY
2013-11-08 315-883-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 SYRACUSE NY
2013-10-03 315-801-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 UTICA NY
2013-09-25 315-728-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 SYRACUSE NY
2012-11-08 315-215-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 ALEXNDRIBY NY
2012-09-06 315-816-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 WATERTOWN NY
2012-06-22 315-257-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 SENECA FLS NY
2012-06-22 315-344-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 HEUVELTON NY
2012-06-22 315-388-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 WADDINGTON NY

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.