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
2003-11-06 815-566-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BELVIDERE IL
2003-10-31 815-215-5XXX 5000–5999Assigned FIRST COMMUNICATIONS, LLC 460K NEW LENOX IL
2003-10-31 815-277-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FRANKFORT IL
2003-10-31 815-277-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FRANKFORT IL
2003-10-31 815-307-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MCHENRY IL
2003-10-31 815-307-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MCHENRY IL
2003-10-31 815-307-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MCHENRY IL
2003-10-31 815-572-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MARENGO IL
2003-10-06 815-595-9XXX 9000–9999Assigned AT&T - LOCAL 7421 OREGON IL
2003-09-26 815-308-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 WOODSTOCK IL
2003-09-24 815-671-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2003-09-24 815-671-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2003-09-19 815-404-8XXX 8000–8999Assigned METROPCS, INC. 5562 CRYSTAL LK IL
2003-09-15 815-600-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 JOLIET IL
2003-09-15 815-718-9XXX 9000–9999Assigned UNITED STATES CELLULAR - IL 6265 STERLING IL
2003-09-10 815-566-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BELVIDERE IL
2003-09-05 815-671-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2003-09-05 815-671-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2003-09-05 815-671-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2003-09-05 815-671-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2003-07-30 815-261-3XXX 3000–3999Assigned FIRST COMMUNICATIONS, LLC 460K CRYSTAL LK IL
2003-07-30 815-306-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 LOCKPORT IL
2003-07-28 815-276-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CRYSTAL LK IL
2003-07-28 815-276-5XXX 5000–5999Assigned METROPCS, INC. 5562 CRYSTAL LK IL
2003-07-28 815-276-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CRYSTAL LK IL
2003-07-28 815-276-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CRYSTAL LK IL
2003-07-16 815-566-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BELVIDERE IL
2003-07-14 815-590-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 STERLING IL
2003-06-26 815-977-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 ROCKFORD IL
2003-06-24 815-326-6XXX 6000–6999Assigned FIRST COMMUNICATIONS, LLC 460K OGLESBY IL
2003-06-24 815-410-2XXX 2000–2999Assigned FIRST COMMUNICATIONS, LLC 460K LA SALLE IL
2003-06-24 815-518-3XXX 3000–3999Assigned FIRST COMMUNICATIONS, LLC 460K COAL CITY IL
2003-06-24 815-769-3XXX 3000–3999Assigned FIRST COMMUNICATIONS, LLC 460K SENECA IL
2003-06-24 815-926-4XXX 4000–4999Assigned FIRST COMMUNICATIONS, LLC 460K WILMINGTON IL
2003-06-20 815-422-4XXX 4000–4999Assigned FIRST COMMUNICATIONS, LLC 460K ST ANNE IL
2003-06-20 815-465-7XXX 7000–7999Assigned FIRST COMMUNICATIONS, LLC 460K GRANT PARK IL
2003-06-20 815-507-1XXX 1000–1999Assigned FIRST COMMUNICATIONS, LLC 460K MOMENCE IL
2003-06-20 815-697-1XXX 1000–1999Assigned FIRST COMMUNICATIONS, LLC 460K CHEBANSE IL
2003-06-20 815-828-3XXX 3000–3999Assigned FIRST COMMUNICATIONS, LLC 460K MINOOKA IL
2003-06-20 815-907-6XXX 6000–6999Assigned FIRST COMMUNICATIONS, LLC 460K MANTENO IL
2003-05-27 815-315-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ROCKFORD IL
2003-05-27 815-566-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 BELVIDERE IL
2003-05-16 815-272-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2003-05-13 815-534-6XXX 6000–6999Assigned FIRST COMMUNICATIONS, LLC 460K FRANKFORT IL
2003-05-12 815-530-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2003-05-12 815-530-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2003-05-12 815-530-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2003-05-12 815-530-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2003-05-12 815-530-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2003-05-12 815-530-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 JOLIET 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.