NumberResearchThousands-blocks in 618-507
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 618-507 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 |
|---|---|---|---|---|---|---|---|
| — | 618-507-0XXX | 0000–0999 | Reserved | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | WOODLAWN | IL |
| 2024-12-06 | 618-507-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WOODLAWN | IL |
| — | 618-507-2XXX | 2000–2999 | Available | WOODLAWN | IL | ||
| — | 618-507-3XXX | 3000–3999 | Available | WOODLAWN | IL | ||
| 2025-06-12 | 618-507-4XXX | 4000–4999 | Assigned | TERRA NOVA TELECOM INC. | 145J | WOODLAWN | IL |
| 2019-07-01 | 618-507-5XXX | 5000–5999 | Assigned | ONVOY, LLC | 224C | WOODLAWN | IL |
| 2019-07-01 | 618-507-6XXX | 6000–6999 | Assigned | ONVOY, LLC | 224C | WOODLAWN | IL |
| 2016-12-15 | 618-507-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | WOODLAWN | IL |
| — | 618-507-8XXX | 8000–8999 | Available | WOODLAWN | IL | ||
| 2020-03-17 | 618-507-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - IL | 984E | 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.