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
2007-01-09 815-451-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WOODSTOCK IL
2007-01-09 815-451-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WOODSTOCK IL
2007-01-09 815-451-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WOODSTOCK IL
2007-01-05 815-708-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ROCKFORD IL
2007-01-05 815-893-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J CRYSTAL LK IL
2006-12-29 815-666-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2006-12-29 815-666-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2006-12-29 815-666-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2006-12-29 815-666-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2006-12-27 815-618-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FREEPORT IL
2006-12-19 815-630-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J JOLIET IL
2006-12-19 815-630-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J JOLIET IL
2006-12-19 815-666-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J JOLIET IL
2006-12-19 815-714-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J JOLIET IL
2006-12-13 815-847-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 ROCKFORD IL
2006-12-07 815-451-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 WOODSTOCK IL
2006-12-06 815-666-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 JOLIET IL
2006-12-04 815-679-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J MCHENRY IL
2006-11-29 815-716-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 STERLING IL
2006-11-27 815-888-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ROCHELLE IL
2006-11-27 815-888-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ROCHELLE IL
2006-11-13 815-489-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J ROCKFORD IL
2006-11-13 815-782-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J PLAINFIELD IL
2006-11-13 815-782-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J PLAINFIELD IL
2006-11-08 815-579-4XXX 4000–4999Assigned METROPCS, INC. 5562 LA SALLE IL
2006-11-01 815-418-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C MANHATTAN IL
2006-11-01 815-424-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C ELWOOD IL
2006-11-01 815-524-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C LOCKPORT IL
2006-11-01 815-782-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C PLAINFIELD IL
2006-10-24 815-614-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J KANKAKEE IL
2006-10-23 815-508-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DE KALB IL
2006-10-20 815-564-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 STERLING IL
2006-10-16 815-847-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROCKFORD IL
2006-10-16 815-847-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROCKFORD IL
2006-10-12 815-630-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2006-10-09 815-451-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 WOODSTOCK IL
2006-10-09 815-666-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 JOLIET IL
2006-10-09 815-666-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 JOLIET IL
2006-10-06 815-677-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 DIXON IL
2006-10-06 815-980-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 ROCKFORD IL
2006-10-06 815-980-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 ROCKFORD IL
2006-10-05 815-644-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CRESCENTCY IL
2006-10-05 815-644-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CRESCENTCY IL
2006-10-04 815-600-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JOLIET IL
2006-10-02 815-517-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J DE KALB IL
2006-10-02 815-517-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J DE KALB IL
2006-10-02 815-630-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J JOLIET IL
2006-10-02 815-630-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J JOLIET IL
2006-09-26 815-587-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 OTTAWA IL
2006-09-26 815-847-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J ROCKFORD 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.