DNS History Ιστορικό αλλαγών DNS

DNS record change history — A, AAAA, MX, NS, TXT and more.

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Automatic recording

Every DNS lookup done through NerdTools is stored automatically.

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Change detection

See exactly when a record changed, what was added and what was removed.

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External data

For domains without local history, we pull data from an external database.

What is Ιστορικό DNS?

The Ιστορικό DNS provides a chronological timeline of changes to a domain's DNS records. Instead of seeing only the current state, you can see when a record changed, which value was replaced and which new value was added — like a log file for your DNS.

Why do DNS records change?

Hosting migration

When you move a site to a new server or cloud provider, the A records change to point to the new IP. The Ιστορικό DNS lets you verify that the change happened at the right point in time.

Changing email provider

Switching from one mail provider to another (e.g. from cPanel mail to Google Workspace or Microsoft 365) requires changes to MX records and possibly to SPF/DKIM TXT records.

Security and incident response

If you suspect someone changed DNS records without authorisation (DNS hijacking), the history shows you exactly when and what changed — a valuable tool for forensic analysis.

How to read the timeline

First record (initial)

The first time NerdTools recorded the records for the domain. This does not mean the records were created then — it was simply the first observation.

Addition (+)

A new value appeared in the record that was not present in the previous snapshot. For example, a new MX server or new SPF record was added.

Removal (−)

A value that existed in the previous snapshot has disappeared. For example, an old nameserver or the IP of the old hosting was removed.

Data sources

The Ιστορικό DNS combines two sources: internal records created every time a DNS lookup is performed through NerdTools, and external data from historical databases for domains that do not yet have local records.

Frequently Asked Questions

How far back can I see data?

Internal data starts from the first time the domain was looked up through NerdTools. For external data, the depth of the history depends on the external source and can go back several years.

When is Ιστορικό DNS useful?

It is particularly useful when investigating whether a domain changed hosting, when you want to verify exactly when a change occurred for troubleshooting purposes, or when you want to review a domain's history before purchasing it.

How often is the history updated?

The history is updated every time a new DNS lookup is performed for the domain through NerdTools. There is no automatic polling — each new search creates a new snapshot and compares it with the previous one.

What if there is no history for my domain?

If no local history is found, the system pulls data from an external database. If there are no results at all, first perform a DNS lookup for the domain — this will start the recording process.