NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

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 518
CENTURYLINK COMMUNICATIONS, LLC 68
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
2017-10-16 518-717-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J NORTHVILLE NY
2017-09-20 518-716-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CANAJOHARI NY
2017-07-31 518-617-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CAIRO NY
2017-07-10 518-516-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HAMPTON NY
2017-06-08 518-994-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J GREENFLCTR NY
2017-05-15 518-413-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BOLTON LDG NY
2017-02-07 518-467-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ELENBGDPOT NY
2016-12-01 518-908-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BRAINADSVL NY
2016-11-17 518-906-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ALTAMONT NY
2016-10-12 518-263-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HUNTER NY
2016-10-12 518-284-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SHARON SPG NY
2016-10-12 518-543-2XXX 2000–2999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HAGUE NY
2016-10-12 518-639-3XXX 3000–3999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J FORT ANN NY
2016-10-12 518-678-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PALENVILLE NY
2016-10-12 518-753-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J VALLEY FLS NY
2016-10-12 518-759-3XXX 3000–3999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WHITEHALL NY
2016-10-12 518-854-2XXX 2000–2999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SALEM NY
2016-10-12 518-875-0XXX 0000–0999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ESPERANCE NY
2016-10-12 518-921-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J GLOVERSVL NY
2016-10-10 518-902-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SCHENCTADY NY
2016-08-31 518-513-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J VOORHEESVL NY
2016-08-31 518-734-2XXX 2000–2999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WINDHAM NY
2016-08-31 518-797-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WESTERLO NY
2016-08-31 518-805-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J TROY NY
2016-08-26 518-239-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J OAK HILL NY
2016-08-26 518-245-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SARATOGSPG NY
2016-08-26 518-351-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SCHROON LK NY
2016-08-26 518-405-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PLATTSBG NY
2016-08-26 518-501-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SOBETHLEHM NY
2016-08-26 518-509-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ROUND LAKE NY
2016-08-26 518-519-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J RICHMONDVL NY
2016-08-26 518-600-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SARANAC NY
2016-08-26 518-619-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SARANAC LK NY
2016-08-26 518-666-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J STREGISFLS NY
2016-08-26 518-740-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J TANNERSVL NY
2016-08-26 518-829-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J TRIBESHILL NY
2016-08-26 518-919-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PUTNAM NY
2016-08-25 518-668-1XXX 1000–1999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LAKEGEORGE NY
2016-08-24 518-418-3XXX 3000–3999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LAKEPLACID NY
2016-08-24 518-481-9XXX 9000–9999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MALONE NY
2016-08-24 518-665-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MECHANICVL NY
2016-08-24 518-735-1XXX 1000–1999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LYON MT NY
2016-08-24 518-896-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MARIAVILLE NY
2016-08-24 518-990-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MOIRA NY
2016-08-23 518-267-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HUDSON NY
2016-08-23 518-531-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J GREENWICH NY
2016-08-23 518-667-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HARTFORD NY
2016-08-23 518-686-2XXX 2000–2999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HOOSICKFLS NY
2016-08-23 518-706-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J JOHNSTOWN NY
2016-08-23 518-809-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J KEENE NY

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.