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 315
CENTURYLINK COMMUNICATIONS, LLC 70
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
2017-10-23 315-815-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CAZENOVIA NY
2017-10-23 315-978-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CENTRAL SQ NY
2016-09-09 315-887-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J FULTON NY
2016-09-09 315-932-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MANLIUS NY
2016-03-16 315-817-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SACKETSHBR NY
2016-03-16 315-819-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J THERESA NY
2016-03-15 315-803-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LA FARGEVL NY
2016-03-15 315-809-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PHILA NY
2015-09-14 315-993-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WADDINGTON NY
2015-01-05 315-969-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J FABIUS NY
2014-11-03 315-965-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WATERTOWN NY
2014-11-03 315-973-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CLAYTON NY
2014-10-16 315-202-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WATERVILLE NY
2014-10-16 315-210-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J NEWARK NY
2014-10-16 315-217-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SKANEATLES NY
2014-10-16 315-258-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J AUBURN NY
2014-10-16 315-259-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CLAYVILLE NY
2014-10-16 315-274-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J POTSDAM NY
2014-10-16 315-309-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J STAR LAKE NY
2014-10-16 315-325-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J GENEVA NY
2014-10-16 315-344-0XXX 0000–0999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HEUVELTON NY
2014-10-16 315-364-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J POPLAR RDG NY
2014-10-16 315-398-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LYONS NY
2014-10-16 315-407-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CAMILLUS NY
2014-10-16 315-417-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ILION NY
2014-10-16 315-496-9XXX 9000–9999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SEMPRONIUS NY
2014-10-16 315-504-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LAFAYETTE NY
2014-10-16 315-516-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LIVERPOOL NY
2014-10-16 315-537-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HARRISVL NY
2014-10-16 315-538-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MACEDON NY
2014-10-16 315-544-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CARTHAGE NY
2014-10-16 315-549-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J FAYETTE NY
2014-10-16 315-585-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MACDOUGALL NY
2014-10-16 315-594-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WOLCOTT NY
2014-10-16 315-599-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J OSCEOLA NY
2014-10-16 315-602-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J OSWEGO NY
2014-10-16 315-614-3XXX 3000–3999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J OGDENSBURG NY
2014-10-16 315-618-3XXX 3000–3999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LITTLE FLS NY
2014-10-16 315-627-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MINOA NY
2014-10-16 315-643-3XXX 3000–3999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MASSENA NY
2014-10-16 315-644-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J NATURALBDG NY
2014-10-16 315-653-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SO OTSELIC NY
2014-10-16 315-666-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CHITTENNGO NY
2014-10-16 315-684-2XXX 2000–2999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MORRISVL NY
2014-10-16 315-693-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ONEIDA NY
2014-10-16 315-712-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SENECA FLS NY
2014-10-16 315-743-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BALDWINSVL NY
2014-10-16 315-810-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J TULLY NY
2014-10-16 315-824-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HAMILTON NY
2014-10-16 315-838-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ROME NY

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.