NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

3 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 847
ONVOY, LLC 2
BANDWIDTH.COM CLEC, LLC - 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
1999-05-03 847-325-2XXX 2000–2999Assigned ILLINOIS BELL TEL CO 9329 WHEELING IL
1999-05-03 847-325-3XXX 3000–3999Assigned ILLINOIS BELL TEL CO 9329 WHEELING IL
1999-04-29 847-434-8XXX 8000–8999Assigned ILLINOIS BELL TEL CO 9329 ELK GROVE IL
1999-04-29 847-463-4XXX 4000–4999Assigned ILLINOIS BELL TEL CO 9329 ARLIGTNHTS IL
1999-04-29 847-463-8XXX 8000–8999Assigned ILLINOIS BELL TEL CO 9329 ARLIGTNHTS IL
1999-04-29 847-993-4XXX 4000–4999Assigned ILLINOIS BELL TEL CO 9329 PARK RIDGE IL
1999-04-12 847-856-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WAUKEGAN IL
1999-04-08 847-406-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 WAUKEGAN IL
1999-04-05 847-214-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ELGIN IL
1999-04-05 847-214-7XXX 7000–7999Assigned ILLINOIS BELL TEL CO 9329 ELGIN IL
1999-04-01 847-233-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 FRANKLINPK IL
1999-04-01 847-307-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 LAKEZURICH IL
1999-04-01 847-512-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 WILMETTE IL
1999-04-01 847-597-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 DEERFIELD IL
1999-04-01 847-876-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 HALF DAY IL
1999-04-01 847-929-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 SKOKIE IL
1999-03-19 847-327-8XXX 8000–8999Assigned RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 8702 LIBERTYVL IL
1999-03-19 847-425-0XXX 0000–0999Assigned RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 8702 EVANSTON IL
1999-03-19 847-513-8XXX 8000–8999Assigned RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 8702 NORTHBROOK IL
1999-03-19 847-603-0XXX 0000–0999Assigned RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 8702 ANTIOCH IL
1999-03-19 847-709-9XXX 9000–9999Assigned RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 8702 ELK GROVE IL
1999-03-19 847-739-8XXX 8000–8999Assigned RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 8702 LAKEFOREST IL
1999-03-19 847-939-0XXX 0000–0999Assigned RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 8702 PARK RIDGE IL
1999-03-15 847-929-2XXX 2000–2999Assigned ILLINOIS BELL TEL CO 9329 SKOKIE IL
1999-03-12 847-871-1XXX 1000–1999Assigned ILLINOIS BELL TEL CO 9329 ELK GROVE IL
1999-03-12 847-871-5XXX 5000–5999Assigned ILLINOIS BELL TEL CO 9329 ELK GROVE IL
1999-03-06 847-592-1XXX 1000–1999Assigned ILLINOIS BELL TEL CO 9329 ROSELLE IL
1999-03-06 847-592-3XXX 3000–3999Assigned ILLINOIS BELL TEL CO 9329 ROSELLE IL
1999-03-05 847-483-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ARLIGTNHTS IL
1999-03-05 847-585-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ROSELLE IL
1999-03-05 847-954-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 DESPLAINES IL
1999-03-03 847-572-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 DEERFIELD IL
1999-03-03 847-656-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 NORTHBROOK IL
1999-03-03 847-656-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 NORTHBROOK IL
1999-03-03 847-994-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 FRANKLINPK IL
1999-02-19 847-544-3XXX 3000–3999Assigned ILLINOIS BELL TEL CO 9329 DESPLAINES IL
1999-02-19 847-544-4XXX 4000–4999Assigned ILLINOIS BELL TEL CO 9329 DESPLAINES IL
1999-02-15 847-214-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J ELGIN IL
1999-02-15 847-241-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J PALATINE IL
1999-02-15 847-324-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J SKOKIE IL
1999-02-15 847-324-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J SKOKIE IL
1999-02-15 847-325-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J WHEELING IL
1999-02-15 847-349-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J FRANKLINPK IL
1999-02-15 847-457-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J LAKEFOREST IL
1999-02-15 847-461-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J GLENCOE IL
1999-02-15 847-483-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J ARLIGTNHTS IL
1999-02-15 847-544-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J DESPLAINES IL
1999-02-15 847-572-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J DEERFIELD IL
1999-02-15 847-579-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J HIGHLANDPK IL
1999-02-15 847-592-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J ROSELLE 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.