Mnemonic Passive DNS
Operator: mnemonic AS, Norway
Researches observed DNS mappings between domains and IP addresses, with historical timestamps.
Technical Infrastructure
Product
Mnemonic Passive DNS
Availability and source date
Active
As of: 25 October 2026.
Check: 25 October 2026.
A public passive DNS query for cnn.com through the REST API.
An API response with responseCode 200 and A/AAAA/CNAME records; the last observation timestamp was from 25 October 2026.
Use in OSINT research
Finds observed DNS mappings for domains or IP addresses. The API also provides first and last observations and DNS record types.
Queries
| Input | Result | Result type |
|---|---|---|
| Domain / website + IP address | Observed DNS records with type and response value, plus first and last observation timestamps through the API. | Retrieved |
Features
- Searches public passive DNS data by domain and IP address.
- Shows observed DNS responses and record types.
- Provides first and last observation timestamps through the API.
- Provides public records as JSON through a REST API.
Categories
- Technical Infrastructure
- DNS
Coverage
Dataset
A public passive DNS dataset from globally distributed sensors. Private customer data requires separate access.
Access
Requirements
Public web queries and API access without an account. The API is limited to ten requests per minute and 1,000 per day.
Export
JSON through the REST API; documentation also lists COFF output.
Provider
mnemonic AS
Country of establishment
Norway
Interfaces
API
Available. A public REST API without sign-in. Ten requests per minute, 1,000 per day and up to 1,000 results per public query.
MCP
Not documented. Not specified on the captured product and documentation pages.
AI agents
Not documented. Not specified on the captured product and documentation pages.
Usage note
According to the provider, public data can be freely shared (TLP:WHITE). Bulk queries are prohibited.
Limitations
- During the test, the web interface showed first and last observation times as N/A; the API returned timestamps.
- The public API returns 25 results by default and up to 1,000; no bulk queries.
Guides and practical reports
Unknown