NumberResearchThousands-blocks in 618-366
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 618-366 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
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2012-10-04 | 618-366-0XXX | 0000–0999 | Assigned | PEERLESS NETWORK OF ILLINOIS, LLC - IL | 063E | KASKASKIA | IL |
| 2018-07-12 | 618-366-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | KASKASKIA | IL |
| — | 618-366-2XXX | 2000–2999 | Reserved | SOUTHWESTERN BELL | 9533 | KASKASKIA | IL |
| 2016-08-22 | 618-366-3XXX | 3000–3999 | Assigned | ONVOY, LLC | 224C | KASKASKIA | IL |
| — | 618-366-4XXX | 4000–4999 | Available | KASKASKIA | IL | ||
| 2022-11-02 | 618-366-5XXX | 5000–5999 | Assigned | COMMIO, LLC | 939H | KASKASKIA | IL |
| 2023-04-04 | 618-366-6XXX | 6000–6999 | Assigned | TELNYX LLC | 073H | KASKASKIA | IL |
| 2014-06-19 | 618-366-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | KASKASKIA | IL |
| 2020-11-18 | 618-366-8XXX | 8000–8999 | Assigned | STRATUS NETWORKS | 495J | KASKASKIA | IL |
| 2020-03-20 | 618-366-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - IL | 984E | KASKASKIA | 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.