Five9 says to always use List Penetration mode when the lists have only one phone number per contact record, or when most records do.

Checked 2026-09-24

You should always use List Penetration Mode if your lists have only one phone number per contact record or if most records have only one phone number.
Vendor
Five9
Product
Five9 Virtual Contact Center
Subsystem
list-management
Deployment
multi-tenant
Region
not restricted
Release range
current as of 2026-09-24
Checked
2026-09-24

Sources

Cite this note

APA

WarmTransfer. (2026, September 24). Five9 routing and campaign model: source note five9-routing-penetration-single-number. WarmTransfer. https://warmtransfer.net/knowledge/claims/five9-routing-penetration-single-number

BibTeX

@misc{warmtransfer-claim-five9-routing-penetration-single-number,
  title  = {Five9 routing and campaign model: source note five9-routing-penetration-single-number},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/claims/five9-routing-penetration-single-number},
  note   = {Source note five9-routing-penetration-single-number, checked 2026-09-24}
}

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