NumberResearchThousands-blocks in 618-390
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 618-390 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
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 |
|---|---|---|---|---|---|---|---|
| — | 618-390-0XXX | 0000–0999 | Reserved | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | WOODLAWN | IL |
| 2016-08-25 | 618-390-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | WOODLAWN | IL |
| 2021-02-01 | 618-390-2XXX | 2000–2999 | Assigned | MCC NETWORK SERVICES, LLC | 075A | WOODLAWN | IL |
| 2018-06-29 | 618-390-3XXX | 3000–3999 | Assigned | ONVOY, LLC | 224C | WOODLAWN | IL |
| — | 618-390-4XXX | 4000–4999 | Available | WOODLAWN | IL | ||
| — | 618-390-5XXX | 5000–5999 | Available | WOODLAWN | IL | ||
| — | 618-390-6XXX | 6000–6999 | Available | WOODLAWN | IL | ||
| 2015-12-21 | 618-390-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | WOODLAWN | IL |
| 2020-06-26 | 618-390-8XXX | 8000–8999 | Assigned | TELNYX LLC | 073H | WOODLAWN | IL |
| 2020-10-26 | 618-390-9XXX | 9000–9999 | Assigned | STRATUS NETWORKS | 495J | WOODLAWN | 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.