NumberResearchThousands-blocks in 618-360
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 618-360 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 618 blocks
Most active assignees, all time — NPA 618
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 618-360-0XXX | 0000–0999 | Reserved | ILLINOIS BELL TEL CO | 9329 | HARMONY | IL |
| 2006-05-16 | 618-360-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | HARMONY | IL |
| 2006-08-29 | 618-360-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | HARMONY | IL |
| 2012-10-04 | 618-360-3XXX | 3000–3999 | Assigned | PEERLESS NETWORK OF ILLINOIS, LLC - IL | 063E | HARMONY | IL |
| 2016-08-19 | 618-360-4XXX | 4000–4999 | Assigned | ONVOY, LLC | 224C | HARMONY | IL |
| 2016-08-19 | 618-360-5XXX | 5000–5999 | Assigned | ONVOY, LLC | 224C | HARMONY | IL |
| 2024-07-16 | 618-360-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | HARMONY | IL |
| 2019-06-29 | 618-360-7XXX | 7000–7999 | Assigned | ONVOY, LLC | 224C | HARMONY | IL |
| 2019-06-29 | 618-360-8XXX | 8000–8999 | Assigned | ONVOY, LLC | 224C | HARMONY | IL |
| 2020-10-26 | 618-360-9XXX | 9000–9999 | Assigned | STRATUS NETWORKS | 495J | HARMONY | 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.