NumberResearchThousands-blocks in 618-574
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/19/2026
The ten 1,000-number thousand-blocks inside prefix 618-574 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 |
|---|---|---|---|---|---|---|---|
| 2021-01-30 | 618-574-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | AVISTON | IL |
| 2016-08-19 | 618-574-1XXX | 1000–1999 | Assigned | ONVOY, LLC | 224C | AVISTON | IL |
| 2016-08-19 | 618-574-2XXX | 2000–2999 | Assigned | ONVOY, LLC | 224C | AVISTON | IL |
| 2021-06-04 | 618-574-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | AVISTON | IL |
| 2021-02-01 | 618-574-4XXX | 4000–4999 | Assigned | MCC NETWORK SERVICES, LLC | 075A | AVISTON | IL |
| 2022-05-12 | 618-574-5XXX | 5000–5999 | Assigned | PEERLESS NETWORK OF ILLINOIS, LLC - IL | 063E | AVISTON | IL |
| — | 618-574-6XXX | 6000–6999 | Available | AVISTON | IL | ||
| 2009-12-08 | 618-574-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | AVISTON | IL |
| 2021-06-09 | 618-574-8XXX | 8000–8999 | Assigned | ONVOY, LLC | 224C | AVISTON | IL |
| 2021-07-14 | 618-574-9XXX | 9000–9999 | Assigned | ONVOY, LLC | 224C | AVISTON | IL |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.