NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

2 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 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
2005-02-16 815-531-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 JOLIET IL
2005-02-15 815-501-0XXX 0000–0999Assigned METROPCS, INC. 5562 DE KALB IL
2005-02-14 815-323-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 BELVIDERE IL
2005-02-08 815-230-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J PLAINFIELD IL
2005-02-08 815-271-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J MCHENRY IL
2005-02-08 815-280-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J JOLIET IL
2005-02-08 815-304-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J KANKAKEE IL
2005-02-08 815-308-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J WOODSTOCK IL
2005-02-08 815-421-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J HERSCHER IL
2005-02-08 815-422-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J ST ANNE IL
2005-02-08 815-513-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J MORRIS IL
2005-02-08 815-524-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J LOCKPORT IL
2005-02-08 815-534-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J FRANKFORT IL
2005-02-08 815-561-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J ROCHELLE IL
2005-02-08 815-697-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J CHEBANSE IL
2005-02-08 815-698-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J ASHKUM IL
2005-02-08 815-717-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J NEW LENOX IL
2005-02-08 815-728-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J WONDERLAKE IL
2005-02-08 815-828-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J MINOOKA IL
2005-02-08 815-907-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J MANTENO IL
2005-02-08 815-918-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J CLIFTON IL
2005-02-08 815-926-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J WILMINGTON IL
2005-02-08 815-991-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J SYCAMORE IL
2005-02-07 815-390-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J BRAIDWOOD IL
2005-02-07 815-518-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J COAL CITY IL
2005-01-30 815-215-4XXX 4000–4999Assigned FIRST COMMUNICATIONS, LLC 460K NEW LENOX IL
2005-01-30 815-269-1XXX 1000–1999Assigned FIRST COMMUNICATIONS, LLC 460K DANFORTH IL
2005-01-30 815-404-5XXX 5000–5999Assigned FIRST COMMUNICATIONS, LLC 460K CRYSTAL LK IL
2005-01-30 815-531-3XXX 3000–3999Assigned FIRST COMMUNICATIONS, LLC 460K JOLIET IL
2005-01-26 815-214-5XXX 5000–5999Assigned FIRST COMMUNICATIONS, LLC 460K KANKAKEE IL
2005-01-26 815-237-6XXX 6000–6999Assigned FIRST COMMUNICATIONS, LLC 460K GARDNER IL
2005-01-26 815-267-5XXX 5000–5999Assigned FIRST COMMUNICATIONS, LLC 460K PLAINFIELD IL
2005-01-26 815-271-3XXX 3000–3999Assigned FIRST COMMUNICATIONS, LLC 460K MCHENRY IL
2005-01-26 815-280-4XXX 4000–4999Assigned FIRST COMMUNICATIONS, LLC 460K JOLIET IL
2005-01-26 815-306-6XXX 6000–6999Assigned FIRST COMMUNICATIONS, LLC 460K LOCKPORT IL
2005-01-26 815-308-6XXX 6000–6999Assigned FIRST COMMUNICATIONS, LLC 460K WOODSTOCK IL
2005-01-26 815-313-3XXX 3000–3999Assigned FIRST COMMUNICATIONS, LLC 460K OTTAWA IL
2005-01-26 815-314-2XXX 2000–2999Assigned FIRST COMMUNICATIONS, LLC 460K MANHATTAN IL
2005-01-26 815-318-3XXX 3000–3999Assigned FIRST COMMUNICATIONS, LLC 460K MORRIS IL
2005-01-26 815-662-3XXX 3000–3999Assigned FIRST COMMUNICATIONS, LLC 460K MOMENCE IL
2005-01-26 815-926-3XXX 3000–3999Assigned FIRST COMMUNICATIONS, LLC 460K WILMINGTON IL
2005-01-25 815-401-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 KANKAKEE IL
2005-01-12 815-207-6XXX 6000–6999Assigned FIRST COMMUNICATIONS, LLC 460K JOLIET IL
2005-01-11 815-272-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2005-01-11 815-506-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J UNION IL
2005-01-11 815-608-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ROCKFORD IL
2005-01-11 815-608-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ROCKFORD IL
2005-01-05 815-315-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ROCKFORD IL
2005-01-05 815-714-3XXX 3000–3999Assigned METROPCS, INC. 5562 JOLIET IL
2005-01-04 815-614-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J KANKAKEE 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.