Tranco is a research-grade domain popularity ranking that averages several commercial top-lists over 30 days, which makes it far harder to manipulate than any single list. ListSignal loads the full list — over 4 million domains — and attaches the rank to every record.

What does Majestic add on top of Tranco?

Tranco approximates traffic; Majestic approximates link authority. A domain with a strong Majestic rank and referring-subnet count has been cited across many independent networks, which is a durable signal of an established business rather than a new site buying traffic.

How are malware and phishing flags applied?

Domains are checked against maintained malware, phishing and disposable-email blocklists on every enrichment. Flags are sticky: once a domain has been listed, the flag stays on the record so a buyer can filter it out permanently.

Methodology

Reputation signals, and what each one really tells you

Three independent sources — traffic rank, link authority and threat blocklists — that together answer 'is this a real, established, safe business?'

Tranco — traffic rank

Tranco is a research-grade popularity ranking that averages several commercial top-lists over a 30-day window. That averaging is the point: single lists are noisy and gameable, while a 30-day average is expensive to manipulate. We load the full list — 4.2 million domains, not the top 1M, so mid-market companies still get a rank.

How to read it

Top 10k — a household name in its market. Top 100k — a serious, well-trafficked business. Top 1M — a real operating company. Unranked — small, new, or regional. Not a negative on its own; most legitimate SMBs are unranked.

Majestic — link authority

Tranco approximates traffic; Majestic approximates earned authority. We record both the rank and referring subnets — the number of distinct networks linking to the domain. Subnets matter more than raw backlink counts because a thousand links from one network is one endorsement, while a thousand links from a thousand networks is a reputation.

Blocklists — malware, phishing, disposable email

Every domain is checked against maintained malware, phishing and disposable-email lists on each enrichment. Flags are sticky: once a domain has been listed, the flag stays on the record even if it later drops off, so you can permanently exclude it rather than re-discovering it next quarter.

Why sticky flags are the right default

Compromised sites get cleaned and re-compromised. For a prospect list, "has been listed" is more useful than "is listed today" — you almost never want that domain in a campaign either way.

Reputation in combination

The signals are most useful together. Ranked and link-authoritative and unflagged is an established business worth a serious pitch. Unranked but with real MX records and a clean history is a small business — often the better lead, because it is reachable. Ranked but flagged is a compromised site: an opportunity for a security vendor, and a liability for everyone else.

Why this decides who you sell to

Qualification before outreach, not after

Reputation is what separates "18,000 domains" from "18,000 companies worth contacting". Filtering to ranked, unflagged domains with live mail routing removes parked pages, abandoned projects and outright fraud before you spend a send on them — which protects your sender reputation as much as your time.

Sizing the pitch

Rank correlates strongly with budget. A top-50k domain justifies a bespoke proposal; an unranked domain with a Shopify store and 40 products justifies a templated offer. Same list, two motions — and the rank is what tells you which.

Other scoring methodology

SEO Score Reputation Signals Revenue Estimation Shopify Store Score

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