NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

22 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, last 30 days — NPA 224
NEW CINGULAR WIRELESS PCS, LLC - IL 11
ONVOY, LLC 6
VERSATEL LLC 1
INTRADO COMMUNICATIONS, LLC 1
EXIANT COMMUNICATIONS LLC 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
2006-03-15 224-361-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 DESPLAINES IL
2006-03-09 224-213-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C NORTHBROOK IL
2006-03-09 224-436-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C LAKEFOREST IL
2006-03-09 224-616-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C GLENVIEW IL
2006-03-09 224-778-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C MUNDELEIN IL
2006-03-09 224-836-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 PALATINE IL
2006-03-08 224-293-2XXX 2000–2999Assigned AT&T ENTERPRISES, LLC 516C DUNDEE IL
2006-03-08 224-515-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C DEERFIELD IL
2006-03-07 224-361-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 DESPLAINES IL
2006-03-07 224-361-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 DESPLAINES IL
2006-02-15 224-265-8XXX 8000–8999Assigned ACCESS ONE, INC. - IL 5447 ELK GROVE IL
2006-02-14 224-345-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2006-02-14 224-388-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2006-02-14 224-388-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2006-02-13 224-616-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 GLENVIEW IL
2006-02-03 224-538-8XXX 8000–8999Assigned METROPCS, INC. 5562 WAUKEGAN IL
2006-01-19 224-735-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C ARLIGTNHTS IL
2006-01-18 224-770-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J BARRINGTON IL
2006-01-16 224-515-7XXX 7000–7999Assigned FIRST COMMUNICATIONS, LLC 460K DEERFIELD IL
2006-01-05 224-399-2XXX 2000–2999Assigned ILLINOIS BELL TEL CO 9329 WAUKEGAN IL
2006-01-05 224-399-3XXX 3000–3999Assigned ILLINOIS BELL TEL CO 9329 WAUKEGAN IL
2006-01-04 224-585-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 PARK RIDGE IL
2006-01-03 224-345-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2006-01-03 224-345-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2005-12-29 224-212-8XXX 8000–8999Assigned ACCESS ONE, INC. - IL 5447 LAKEFOREST IL
2005-12-29 224-330-6XXX 6000–6999Assigned ACCESS ONE, INC. - IL 5447 NORTHBROOK IL
2005-12-29 224-444-3XXX 3000–3999Assigned ACCESS ONE, INC. - IL 5447 LAKE VILLA IL
2005-12-29 224-520-6XXX 6000–6999Assigned ACCESS ONE, INC. - IL 5447 ROSELLE IL
2005-12-29 224-569-5XXX 5000–5999Assigned ACCESS ONE, INC. - IL 5447 HUNTLEY IL
2005-12-29 224-836-6XXX 6000–6999Assigned ACCESS ONE, INC. - IL 5447 PALATINE IL
2005-12-27 224-610-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 WAUKEGAN IL
2005-12-19 224-836-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 PALATINE IL
2005-12-19 224-836-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 PALATINE IL
2005-12-14 224-265-9XXX 9000–9999Assigned FIRST COMMUNICATIONS, LLC 460K ELK GROVE IL
2005-12-09 224-616-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 GLENVIEW IL
2005-12-09 224-616-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 GLENVIEW IL
2005-12-09 224-770-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 BARRINGTON IL
2005-12-09 224-770-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BARRINGTON IL
2005-12-07 224-757-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ROUND LAKE IL
2005-12-07 224-757-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ROUND LAKE IL
2005-11-28 224-260-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 GLENVIEW IL
2005-11-28 224-260-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 GLENVIEW IL
2005-11-23 224-207-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 LIBERTYVL IL
2005-11-23 224-286-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 LAKEZURICH IL
2005-11-15 224-420-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 EVANSTON IL
2005-11-15 224-420-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 EVANSTON IL
2005-11-04 224-603-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ANTIOCH IL
2005-11-04 224-603-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ANTIOCH IL
2005-11-03 224-213-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 NORTHBROOK IL
2005-11-03 224-213-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 NORTHBROOK 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.