NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

2 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, last 30 days — NPA 815
VERSATEL LLC 1
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 1
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
2010-05-17 815-580-7XXX 7000–7999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F CHERRY VLY IL
2010-05-17 815-581-3XXX 3000–3999Assigned MCC TELEPHONY LLC 593K SPRING GRV 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
2010-05-17 815-797-1XXX 1000–1999Assigned MCC TELEPHONY LLC 593K SOMONAUK IL
2010-05-17 815-862-0XXX 0000–0999Assigned MCC TELEPHONY LLC 593K RICHMOND IL
2010-05-17 815-885-7XXX 7000–7999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F ROCK CUT IL
2010-05-13 815-339-1XXX 1000–1999Assigned MCC TELEPHONY LLC 593K GRANVILLE IL
2010-05-10 815-992-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 STREATOR IL
2010-05-07 815-375-4XXX 4000–4999Assigned METROPCS, INC. 5562 DE KALB IL
2010-05-03 815-417-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J BRAIDWOOD IL
2010-04-29 815-999-3XXX 3000–3999Assigned FIRST COMMUNICATIONS, LLC 460K JOLIET IL
2010-04-29 815-999-4XXX 4000–4999Assigned FIRST COMMUNICATIONS, LLC 460K JOLIET IL
2010-04-28 815-312-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 ROCKFORD IL
2010-04-27 815-318-1XXX 1000–1999Assigned ONVOY, LLC 224C MORRIS IL
2010-04-27 815-348-6XXX 6000–6999Assigned ONVOY, LLC 224C KANKAKEE IL
2010-04-27 815-418-5XXX 5000–5999Assigned ONVOY, LLC 224C MANHATTAN IL
2010-04-23 815-514-2XXX 2000–2999Assigned FIRST COMMUNICATIONS, LLC 460K JOLIET IL
2010-04-23 815-782-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C PLAINFIELD IL
2010-04-21 815-305-5XXX 5000–5999Assigned ONVOY, LLC 224C GARDNER IL
2010-04-21 815-320-8XXX 8000–8999Assigned ONVOY, LLC 224C NEW LENOX IL
2010-04-21 815-407-8XXX 8000–8999Assigned ONVOY, LLC 224C LOCKPORT IL
2010-04-21 815-417-0XXX 0000–0999Assigned ONVOY, LLC 224C BRAIDWOOD IL
2010-04-21 815-556-6XXX 6000–6999Assigned ONVOY, LLC 224C PLAINFIELD IL
2010-04-21 815-668-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROCKFORD IL
2010-04-20 815-527-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 WOODSTOCK IL
2010-04-15 815-526-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J CRYSTAL LK IL
2010-04-09 815-219-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CRYSTAL LK IL
2010-04-09 815-290-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E MINOOKA IL
2010-04-09 815-661-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E MORRIS IL
2010-04-08 815-516-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ROCKFORD IL
2010-03-29 815-306-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E LOCKPORT IL
2010-03-29 815-348-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E KANKAKEE IL
2010-03-29 815-733-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E PLAINFIELD IL
2010-03-26 815-320-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J NEW LENOX IL
2010-03-25 815-800-1XXX 1000–1999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F POPLAR GRV IL
2010-03-24 815-884-1XXX 1000–1999Assigned MCC TELEPHONY LLC 593K EARLVILLE 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

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.