NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 815-386

This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The ten 1,000-number thousand-blocks inside prefix 815-386 and who was initially assigned each. Under pooling these blocks often belong to different carriers — the single prefix-level “assignee” is usually just the pool / code holder, not who holds the numbers. ← all 815 blocks

Most active assignees, all time — NPA 815
T-MOBILE USA, INC. 7
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 1
BANDWIDTH.COM CLEC, LLC - IL 1
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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
— 815-386-0XXX 0000–0999Reserved CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 KANKAKEE IL
2011-07-25 815-386-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 KANKAKEE IL
2011-07-25 815-386-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 KANKAKEE IL
2010-09-10 815-386-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 KANKAKEE IL
2010-12-07 815-386-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 KANKAKEE IL
2015-01-27 815-386-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E KANKAKEE IL
2010-12-07 815-386-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 KANKAKEE IL
2014-06-06 815-386-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 KANKAKEE IL
2011-07-25 815-386-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 KANKAKEE IL
— 815-386-9XXX 9000–9999Available KANKAKEE IL

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.