NumberResearchThousands-blocks in 618-657
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 618-657 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 |
|---|---|---|---|---|---|---|---|
| 2020-06-11 | 618-657-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | CYPRESS | IL |
| 2020-11-20 | 618-657-1XXX | 1000–1999 | Assigned | STRATUS NETWORKS | 495J | CYPRESS | IL |
| — | 618-657-2XXX | 2000–2999 | Reserved | FRONTIER NORTH, INC. - IL | 1015 | CYPRESS | IL |
| 2021-02-02 | 618-657-3XXX | 3000–3999 | Assigned | ONVOY, LLC | 224C | CYPRESS | IL |
| 2023-05-31 | 618-657-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CYPRESS | IL |
| 2025-07-08 | 618-657-5XXX | 5000–5999 | Assigned | TERRA NOVA TELECOM INC. | 145J | CYPRESS | IL |
| 2018-08-10 | 618-657-6XXX | 6000–6999 | Assigned | ONVOY, LLC | 224C | CYPRESS | IL |
| 2004-06-03 | 618-657-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | CYPRESS | IL |
| 2019-08-09 | 618-657-8XXX | 8000–8999 | Assigned | ONVOY, LLC | 224C | CYPRESS | IL |
| 2003-01-14 | 618-657-9XXX | 9000–9999 | Assigned | MCC NETWORK SERVICES, LLC | 9915 | CYPRESS | 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.