B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
25%
25% -- annual data decay rate for B2B direct-dial phone numbers (2026-06)
Direct-dial phone numbers decay at an estimated rate of 25% to 35% per year.
- Vendor-reported data
Attribution:
View source
Lighthouse Research Team
Last verified:
·
How we verify data →
Source verified
Evidence graded
Value
25%
Unit
Percentage
Data Vintage
2026-06
Entity
Evidence Quality
B
Strong, reliable evidence
Sourced from a well-regarded research firm or industry leader with transparent methodology and a reasonably large sample.
Single source - not yet corroborated
Score breakdown
Extraction
50
Source Trust
60
Citation Chain
60
Independence
30
Methodology
45
Freshness
95
Source
ZoomInfo
Primary
Tier C
https://pipeline.zoominfo.com/marketing/b2b-data-decay ↗
Source Article
How to A/B Test Enrichment Vendors Without Breaking Your Pipeline (2026)
Disclosure: This article is published by Datamagnet. Vendor claims are self-reported unless otherwise noted.
How to A/B Test Enrichment Vendors Without Breaking Your Pipeline
An independent benchmark of eight company-enrichment APIs found field accuracy ranging from 89.0% to 92.6% on the same 282 hu…
Original Research
ZoomInfo
· Original study ↗
Methodology
Vendor-reported (ZoomInfo), directional; range midpoint extracted
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
B2B direct-dial phone numbers: 25% annual data decay rate. Source: ZoomInfo (2026-06). Via Lighthouse Intelligence -- https://lighthousedata.io/data/direct-dial-decay-annual-2026
HTML Embed
<blockquote cite="https://lighthousedata.io/data/direct-dial-decay-annual-2026" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>25%</strong> -- annual data decay rate for B2B direct-dial phone numbers<br><small>Source: ZoomInfo (2026-06) · <a href="https://lighthousedata.io/data/direct-dial-decay-annual-2026" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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