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
2001-04-19 847-354-7XXX 7000–7999Assigned ILLINOIS BELL TEL CO 9329 ELK GROVE IL
2001-04-19 847-383-8XXX 8000–8999Assigned ILLINOIS BELL TEL CO 9329 HALF DAY IL
2001-04-09 847-231-7XXX 7000–7999Assigned FIRST COMMUNICATIONS, LLC 460K GRAYSLAKE IL
2001-04-09 847-268-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 PARK RIDGE IL
2001-04-09 847-893-3XXX 3000–3999Assigned FIRST COMMUNICATIONS, LLC 460K BARTLETT IL
2001-04-09 847-932-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LIBERTYVL IL
2001-04-02 847-376-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 DESPLAINES IL
2001-03-14 847-847-0XXX 0000–0999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 LAKEZURICH IL
2001-03-13 847-410-3XXX 3000–3999Assigned FIRST COMMUNICATIONS, LLC 460K SKOKIE IL
2001-03-12 847-258-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J ELK GROVE IL
2001-03-12 847-321-4XXX 4000–4999Assigned ILLINOIS BELL TEL CO 9329 DESPLAINES IL
2001-03-12 847-388-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MUNDELEIN IL
2001-03-12 847-979-2XXX 2000–2999Assigned ILLINOIS BELL TEL CO 9329 ELK GROVE IL
2001-03-06 847-376-4XXX 4000–4999Assigned ILLINOIS BELL TEL CO 9329 DESPLAINES IL
2001-02-28 847-377-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 WAUKEGAN IL
2001-02-28 847-377-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 WAUKEGAN IL
2001-02-28 847-377-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 WAUKEGAN IL
2001-02-28 847-377-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 WAUKEGAN IL
2001-02-19 847-579-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J HIGHLANDPK IL
2001-02-12 847-440-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 EVANSTON IL
2001-01-16 847-388-2XXX 2000–2999Assigned ILLINOIS BELL TEL CO 9329 MUNDELEIN IL
2001-01-13 847-960-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 ALGONQUIN IL
2001-01-03 847-493-3XXX 3000–3999Assigned ILLINOIS BELL TEL CO 9329 DESPLAINES IL
2001-01-03 847-874-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ROSELLE IL
2001-01-03 847-874-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ROSELLE IL
2001-01-03 847-874-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ROSELLE IL
2001-01-03 847-874-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ROSELLE IL
2000-12-21 847-434-6XXX 6000–6999Assigned RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 8702 ELK GROVE IL
2000-12-21 847-463-6XXX 6000–6999Assigned RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 8702 ARLIGTNHTS IL
2000-12-19 847-941-1XXX 1000–1999Assigned FIRST COMMUNICATIONS, LLC 460K WHEELING IL
2000-12-16 847-313-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 NORTHBROOK IL
2000-12-16 847-313-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 NORTHBROOK IL
2000-12-16 847-810-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 LAKEFOREST IL
2000-12-16 847-905-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 EVANSTON IL
2000-11-20 847-929-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 SKOKIE IL
2000-11-15 847-659-8XXX 8000–8999Assigned ILLINOIS BELL TEL CO 9329 HUNTLEY IL
2000-11-14 847-544-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 DESPLAINES IL
2000-11-14 847-659-1XXX 1000–1999Assigned ILLINOIS BELL TEL CO 9329 HUNTLEY IL
2000-11-09 847-201-9XXX 9000–9999Assigned FIRST COMMUNICATIONS, LLC 460K ROUND LAKE IL
2000-11-09 847-464-7XXX 7000–7999Assigned FIRST COMMUNICATIONS, LLC 460K PLATO CTR IL
2000-11-07 847-994-5XXX 5000–5999Assigned ILLINOIS BELL TEL CO 9329 FRANKLINPK IL
2000-11-07 847-994-6XXX 6000–6999Assigned ILLINOIS BELL TEL CO 9329 FRANKLINPK IL
2000-11-03 847-856-6XXX 6000–6999Assigned ILLINOIS BELL TEL CO 9329 WAUKEGAN IL
2000-11-01 847-775-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WAUKEGAN IL
2000-10-18 847-377-0XXX 0000–0999Assigned FIRST COMMUNICATIONS, LLC 460K WAUKEGAN IL
2000-10-18 847-719-0XXX 0000–0999Assigned FIRST COMMUNICATIONS, LLC 460K LAKEZURICH IL
2000-10-18 847-750-9XXX 9000–9999Assigned FIRST COMMUNICATIONS, LLC 460K BENSENVL IL
2000-10-18 847-898-9XXX 9000–9999Assigned FIRST COMMUNICATIONS, LLC 460K BARRINGTON IL
2000-10-17 847-245-5XXX 5000–5999Assigned FIRST COMMUNICATIONS, LLC 460K LAKE VILLA IL
2000-10-17 847-649-9XXX 9000–9999Assigned FIRST COMMUNICATIONS, LLC 460K DUNDEE 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.