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
2010-07-21 815-516-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ROCKFORD IL
2010-07-21 815-516-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ROCKFORD IL
2010-07-21 815-579-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LA SALLE IL
2010-07-16 815-992-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 STREATOR IL
2010-07-15 815-322-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E MCHENRY IL
2010-07-01 815-500-9XXX 9000–9999Assigned MCC TELEPHONY LLC 593K MARSEILLES IL
2010-06-30 815-806-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J FRANKFORT IL
2010-06-25 815-632-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J STERLING IL
2010-06-25 815-677-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J DIXON IL
2010-06-18 815-616-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 FREEPORT IL
2010-06-16 815-517-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 DE KALB IL
2010-06-11 815-202-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 OGLESBY IL
2010-06-11 815-202-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 OGLESBY IL
2010-06-11 815-770-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E HARVARD IL
2010-06-10 815-600-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JOLIET IL
2010-06-04 815-219-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CRYSTAL LK IL
2010-06-04 815-255-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E MINOOKA IL
2010-06-04 815-320-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E NEW LENOX IL
2010-06-04 815-513-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E MORRIS IL
2010-06-04 815-587-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E OTTAWA 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
2010-06-01 815-429-6XXX 6000–6999Assigned MCC TELEPHONY LLC 593K SHELDON 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
2010-06-01 815-473-0XXX 0000–0999Assigned MCC TELEPHONY LLC 593K WOODLAND 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
2010-05-21 815-570-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 SANDWICH IL
2010-05-20 815-503-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 MENDOTA IL
2010-05-20 815-656-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 FREEPORT IL
2010-05-20 815-901-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 DE KALB IL
2010-05-18 815-495-0XXX 0000–0999Assigned MCC TELEPHONY LLC 593K LELAND IL
2010-05-18 815-648-7XXX 7000–7999Assigned MCC TELEPHONY LLC 593K HEBRON IL
2010-05-18 815-651-2XXX 2000–2999Assigned FIRST COMMUNICATIONS, LLC 460K JOLIET IL
2010-05-18 815-728-3XXX 3000–3999Assigned MCC TELEPHONY LLC 593K WONDERLAKE IL
2010-05-18 815-930-0XXX 0000–0999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F ELIZABETH IL
2010-05-17 815-496-7XXX 7000–7999Assigned MCC TELEPHONY LLC 593K SHERIDAN IL
2010-05-17 815-560-9XXX 9000–9999Assigned MCC TELEPHONY LLC 593K HARVARD IL
2010-05-17 815-569-8XXX 8000–8999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F CAPRON 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.