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 309
MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 98
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
2019-12-12 309-524-7XXX 7000–7999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F MOLINE IL
2019-05-13 309-355-1XXX 1000–1999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F GRIDLEY IL
2018-05-16 309-524-3XXX 3000–3999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F MOLINE IL
2017-05-24 309-524-4XXX 4000–4999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F MOLINE IL
2012-03-06 309-203-1XXX 1000–1999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F EASTMOLINE IL
2012-01-05 309-206-4XXX 4000–4999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F ROCKISLAND IL
2011-09-07 309-517-6XXX 6000–6999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F MOLINE IL
2010-03-25 309-932-1XXX 1000–1999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F GALVA IL
2010-03-16 309-286-0XXX 0000–0999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F TOULON IL
2010-03-16 309-288-0XXX 0000–0999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F MINERAL IL
2010-03-16 309-594-0XXX 0000–0999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F NEPONSET IL
2010-03-16 309-606-9XXX 9000–9999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F WYOMING IL
2010-03-16 309-894-2XXX 2000–2999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F BUDA IL
2010-03-16 309-897-0XXX 0000–0999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F BRADFORD IL
2010-03-15 309-514-2XXX 2000–2999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F ALBANY IL
2010-03-15 309-515-9XXX 9000–9999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F ERIE IL
2010-03-15 309-551-9XXX 9000–9999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F MATHERVL IL
2010-03-15 309-552-1XXX 1000–1999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F ATKINSON IL
2010-03-15 309-559-1XXX 1000–1999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F OQUAWKA IL
2010-03-15 309-568-2XXX 2000–2999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F ANDOVER IL
2010-03-15 309-600-1XXX 1000–1999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F PREEMPTION IL
2010-03-15 309-626-2XXX 2000–2999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F ORION IL
2010-03-15 309-707-1XXX 1000–1999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F CAMBRIDGE IL
2010-03-15 309-710-1XXX 1000–1999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F ANNAWAN IL
2010-03-15 309-720-3XXX 3000–3999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F SHERRARD IL
2010-03-15 309-771-1XXX 1000–1999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F HILLSDALE IL
2010-03-15 309-809-9XXX 9000–9999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F REYNOLDS IL
2010-03-15 309-843-1XXX 1000–1999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F ALEXIS IL
2010-03-15 309-845-1XXX 1000–1999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F OSCO IL
2010-03-15 309-848-9XXX 9000–9999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F PORT BYRON IL
2010-03-15 309-871-5XXX 5000–5999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F VIOLA IL
2010-03-15 309-933-1XXX 1000–1999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F GREENRIVER IL
2010-03-15 309-987-1XXX 1000–1999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F CORDOVA IL
2010-03-09 309-281-1XXX 1000–1999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F EASTMOLINE IL
2010-03-04 309-283-7XXX 7000–7999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F ROCKISLAND IL
2010-03-04 309-302-0XXX 0000–0999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F HAMPTON IL
2010-03-04 309-489-0XXX 0000–0999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F GENESEO IL
2010-03-04 309-517-1XXX 1000–1999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F MOLINE IL
2010-03-04 309-574-3XXX 3000–3999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F ALEDO IL
2010-03-04 309-795-3XXX 3000–3999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F EDGINGTON IL
2010-02-04 309-503-9XXX 9000–9999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F TOWANDA IL
2010-02-04 309-504-9XXX 9000–9999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F DANVERS IL
2010-02-04 309-554-9XXX 9000–9999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F LACON IL
2010-02-04 309-564-9XXX 9000–9999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F EL PASO IL
2010-02-04 309-651-9XXX 9000–9999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F YATES CITY IL
2010-02-04 309-814-9XXX 9000–9999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F GLASFORD IL
2010-02-04 309-842-9XXX 9000–9999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F GERMATNHLS IL
2010-02-04 309-849-9XXX 9000–9999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F METAMORA IL
2010-02-04 309-855-8XXX 8000–8999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F FAIRVIEW IL
2010-02-04 309-977-8XXX 8000–8999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F GREEN VLY IL

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.