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 815
MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 66
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
2019-08-01 815-948-4XXX 4000–4999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F HOOPPOLE IL
2017-08-24 815-982-0XXX 0000–0999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F TAMPICO IL
2016-05-04 815-688-4XXX 4000–4999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F STRAWN IL
2016-05-04 815-863-6XXX 6000–6999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F RUTLAND IL
2010-06-01 815-239-4XXX 4000–4999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F PECATONICA IL
2010-06-01 815-248-1XXX 1000–1999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F DURAND IL
2010-06-01 815-335-5XXX 5000–5999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F WINNEBAGO IL
2010-06-01 815-367-1XXX 1000–1999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F WINSLOW IL
2010-06-01 815-369-1XXX 1000–1999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F LENA IL
2010-06-01 815-443-1XXX 1000–1999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F PEARL CITY IL
2010-06-01 815-449-1XXX 1000–1999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F DAKOTA IL
2010-06-01 815-591-1XXX 1000–1999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F HANOVER IL
2010-06-01 815-594-1XXX 1000–1999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F APPLERIVER IL
2010-06-01 815-616-3XXX 3000–3999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F FREEPORT IL
2010-06-01 815-745-1XXX 1000–1999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F WARREN IL
2010-06-01 815-789-2XXX 2000–2999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F ORANGEVL IL
2010-06-01 815-845-1XXX 1000–1999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F SCALESMOND IL
2010-06-01 815-865-1XXX 1000–1999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F DAVIS IL
2010-06-01 815-868-1XXX 1000–1999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F MCCONNELL IL
2010-06-01 815-947-1XXX 1000–1999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F STOCKTON IL
2010-05-18 815-930-0XXX 0000–0999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F ELIZABETH IL
2010-05-17 815-569-8XXX 8000–8999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F CAPRON IL
2010-05-17 815-580-7XXX 7000–7999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F CHERRY VLY IL
2010-05-17 815-597-8XXX 8000–8999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F GARDENPRRI IL
2010-05-17 815-645-6XXX 6000–6999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F STILMANVLY IL
2010-05-17 815-885-7XXX 7000–7999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F ROCK CUT IL
2010-03-25 815-800-1XXX 1000–1999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F POPLAR GRV IL
2010-03-16 815-379-3XXX 3000–3999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F WALNUT IL
2010-03-16 815-445-7XXX 7000–7999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F MANLIUS IL
2010-03-16 815-454-8XXX 8000–8999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F SHEFFIELD IL
2010-03-16 815-659-4XXX 4000–4999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F BUREAU IL
2010-03-16 815-925-3XXX 3000–3999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F HENNEPIN IL
2010-03-15 815-208-7XXX 7000–7999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F FULTON IL
2010-03-15 815-554-6XXX 6000–6999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F E DUBUQUE IL
2010-03-15 815-565-7XXX 7000–7999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F SAVANNA IL
2010-03-15 815-855-3XXX 3000–3999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F MILLEDGEVL IL
2010-03-15 815-897-9XXX 9000–9999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F LYNDON IL
2010-03-15 815-902-6XXX 6000–6999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F THOMSON IL
2010-03-15 815-913-5XXX 5000–5999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F CHADWICK IL
2010-03-15 815-989-6XXX 6000–6999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F PROPHETSTN IL
2010-03-08 815-283-1XXX 1000–1999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F WATERMAN IL
2010-03-03 815-286-0XXX 0000–0999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F HINCKLEY IL
2010-03-03 815-393-7XXX 7000–7999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F MONROE CTR IL
2010-03-03 815-493-3XXX 3000–3999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F LANARK IL
2010-03-03 815-522-0XXX 0000–0999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F KIRKLAND IL
2010-03-03 815-824-3XXX 3000–3999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F SHABBONA IL
2010-03-03 815-825-3XXX 3000–3999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F MALTA IL
2010-03-03 815-827-0XXX 0000–0999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F MAPLE PARK IL
2010-03-03 815-864-0XXX 0000–0999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F SHANNON IL
2010-03-03 815-906-0XXX 0000–0999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F MT CARROLL 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.