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 309
CENTURYLINK COMMUNICATIONS, LLC 73
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
2016-10-03 309-464-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J NOHENDERSN IL
2016-10-03 309-537-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ELIZA IL
2016-10-03 309-872-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J RIO IL
2016-09-20 309-543-9XXX 9000–9999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HAVANA IL
2016-09-20 309-865-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J EASTMOLINE IL
2016-09-12 309-430-2XXX 2000–2999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ROCKISLAND IL
2016-09-12 309-602-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SHERRARD IL
2016-09-08 309-551-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MATHERVL IL
2016-09-08 309-600-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PREEMPTION IL
2016-09-08 309-623-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MOLINE IL
2016-09-08 309-626-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ORION IL
2016-09-08 309-848-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PORT BYRON IL
2016-09-07 309-207-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ILLINOISCY IL
2016-09-07 309-514-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ALBANY IL
2016-09-07 309-771-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HILLSDALE IL
2016-09-07 309-987-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CORDOVA IL
2016-08-08 309-516-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J KILBOURNE IL
2016-08-08 309-605-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BATH IL
2016-07-06 309-228-3XXX 3000–3999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J FARMINGTON IL
2016-07-06 309-896-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ELMIRA IL
2016-07-06 309-932-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J GALVA IL
2016-07-05 309-362-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J TRIVOLI IL
2016-07-05 309-606-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WYOMING IL
2016-07-05 309-929-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J TREMONT IL
2016-07-01 309-247-2XXX 2000–2999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SAN JOSE IL
2016-07-01 309-396-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PRINCEVL IL
2016-07-01 309-505-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SUNNYLAND IL
2016-07-01 309-889-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SPRING BAY IL
2016-06-30 309-288-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MINERAL IL
2016-06-30 309-291-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MORTON IL
2016-06-30 309-354-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MACKINAW IL
2016-06-30 309-547-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LEWISTOWN IL
2016-06-30 309-580-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MOSSVILLE IL
2016-06-30 309-595-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J NEPONSET IL
2016-06-30 309-753-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J IPAVA IL
2016-06-30 309-885-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PEKIN IL
2016-06-29 309-395-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J GROVELAND IL
2016-06-29 309-398-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LA ROSE IL
2016-06-29 309-554-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LACON IL
2016-06-28 309-226-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CANTON IL
2016-06-28 309-244-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J DELAVAN IL
2016-06-28 309-480-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CASTLETON IL
2016-06-28 309-492-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CAMPGROVE IL
2016-06-28 309-894-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BUDA IL
2016-06-28 309-898-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BRADFORD IL
2016-06-01 309-540-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J KEWANEE IL
2016-05-13 309-512-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PEORIA IL
2014-08-13 309-725-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J COOKSVILLE IL
2014-07-10 309-379-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J STANFORD IL
2014-07-10 309-503-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J TOWANDA IL

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.