NumberResearchThousands-blocks in 815-427
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
The ten 1,000-number thousand-blocks inside prefix 815-427 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
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
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2013-04-03 | 815-427-0XXX | 0000–0999 | Assigned | PEERLESS NETWORK OF ILLINOIS, LLC - IL | 063E | ST ANNE | IL |
| 2016-03-17 | 815-427-1XXX | 1000–1999 | Assigned | ONVOY, LLC | 224C | ST ANNE | IL |
| 2011-10-18 | 815-427-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ST ANNE | IL |
| 2013-04-03 | 815-427-3XXX | 3000–3999 | Assigned | PEERLESS NETWORK OF ILLINOIS, LLC - IL | 063E | ST ANNE | IL |
| 2016-03-17 | 815-427-4XXX | 4000–4999 | Assigned | ONVOY, LLC | 224C | ST ANNE | IL |
| 2018-08-23 | 815-427-5XXX | 5000–5999 | Assigned | ONVOY, LLC | 224C | ST ANNE | IL |
| — | 815-427-6XXX | 6000–6999 | Reserved | ILLINOIS BELL TEL CO | 9329 | ST ANNE | IL |
| 2014-01-29 | 815-427-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | ST ANNE | IL |
| — | 815-427-8XXX | 8000–8999 | Reserved | ILLINOIS BELL TEL CO | 9329 | ST ANNE | IL |
| 2015-08-28 | 815-427-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - IL | 984E | ST ANNE | 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.