NumberResearchThousands-blocks in 618-742
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 618-742 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 |
|---|---|---|---|---|---|---|---|
| 2010-03-17 | 618-742-0XXX | 0000–0999 | Assigned | MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL | 846F | MOUND CITY | IL |
| 2020-06-22 | 618-742-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | MOUND CITY | IL |
| 2019-08-09 | 618-742-2XXX | 2000–2999 | Assigned | ONVOY, LLC | 224C | MOUND CITY | IL |
| 2019-08-09 | 618-742-3XXX | 3000–3999 | Assigned | ONVOY, LLC | 224C | MOUND CITY | IL |
| — | 618-742-4XXX | 4000–4999 | Available | MOUND CITY | IL | ||
| 2025-09-18 | 618-742-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MOUND CITY | IL |
| — | 618-742-6XXX | 6000–6999 | Reserved | ILLINOIS BELL TEL CO | 9329 | MOUND CITY | IL |
| 2025-09-22 | 618-742-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | MOUND CITY | IL |
| 2025-07-07 | 618-742-8XXX | 8000–8999 | Assigned | TERRA NOVA TELECOM INC. | 145J | MOUND CITY | IL |
| 2003-01-14 | 618-742-9XXX | 9000–9999 | Assigned | MCC NETWORK SERVICES, LLC | 9915 | MOUND CITY | 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.