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LastDatabase Data Research Center

Original research into the structure, coverage and measurable characteristics of contact datasets. This research center covers email, phone, fax, multi-channel, B2B and B2C data.

Research principle: published findings should distinguish directly measured results from classifications, estimates and limitations. Inventory size alone does not establish accuracy, deliverability, consent or verification status.

Current Research Inventory

26,512,559 Email records
26,833,550 Phone records
0 Fax records
7 Mixed packages

Research Areas

Select a data category to explore its research roadmap and methodology.

Email Data Research

Research into email data coverage, field completeness, geographic distribution, duplication, database timestamps and other measurable characteristics of email datasets.

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Phone Data Research

Research into phone data coverage, country distribution, carrier information, geographic fields, duplication, database timestamps and other measurable characteristics of phone datasets.

Explore Phone Research →

Fax Data Research

Research into business fax data coverage, geographic distribution, company fields, industry coverage and measurable data characteristics.

Explore Fax Research →

Mixed & Multi-Channel Data Research

Research examining datasets and packages that combine multiple contact channels, including email and phone data.

Explore Mixed Research →

B2B Data Research

Research into business contact data, decision-maker attributes, job titles, industries, companies, technologies, geographic coverage and B2B data structure.

Explore B2B Research →

B2C Data Research

Research into consumer-oriented contact datasets, geographic coverage, phone data, categories and other measurable B2C dataset characteristics.

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Published Research Reports

Read completed LastDatabase studies with documented methods, measured findings and stated limitations.

B2B Email Quality Benchmark 2026

A deterministic 1,000-record study covering email syntax, DNS mail configuration, duplication and field completeness, with a predetermined 100-record subset validated by ZeroBounce.

Read B2B Email Quality Benchmark →

Consumer Email Data Profile 2026

Measured analysis of 49,786,975 consumer email records, including email-hash uniqueness, field completeness, source coverage and geographic distribution.

Read Consumer Email Data Profile →

Email Data Profile 2026

Analysis of the LastDatabase B2B email dataset, including inventory size, field availability and measurable database characteristics.

Read Email Data Profile →

Research Methodology & Transparency

Research published by LastDatabase should use reproducible definitions and measurable database characteristics. Reports may examine inventory size, field completeness, duplication, geographic representation, available source fields and timestamps.

B2B and B2C are classifications rather than dedicated physical tables in the current research database. B2B/B2C totals will therefore not be presented as measured findings until a documented classification methodology has been established.

Read more about our methodology, data sources, data quality framework and editorial policy.

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