Quick Start

1) Provide Input

• Manual: Paste one domain per line (e.g., example.com). No commas, no protocols.
• File Upload: .txt or .csv with one domain per row, no header.

2) Choose Output

• Select an output folder and filename.
• Results are saved as .csv; certain modules can also generate per-domain .pdf.

3) Run the Scan

1. Enter or upload domains.
2. Set the output location and filename.
3. Click Start to begin.

Best Practices

• Split extremely large lists into multiple batches to reduce timeouts.
• Use a stable connection; VPN is recommended for very large runs.
• Validate a small sample first to confirm output columns meet your needs.

Troubleshooting & Support

If you hit errors, retry with a smaller batch and confirm domains are in simple form (example.com, not URLs). This app is maintained as a side project; support isn't guaranteed per Terms.

Main Functions

Domain QuickScan

Designed for speed and volume. Paste or upload a large list of domains and produce a compact dataset of core DNS facts suitable for enrichment, filtering, and pivot analysis.

Output fields:
Timestamp, Domain, MX, Email Gateway, SPF, DMARC, TXT, A, NS, Technology Listed In DNS

• When to use: Very large projects; rapid triage and inventory.
• Input modes: Domain QuickScan (text box) and QuickScan Upload .txt/.csv (file upload) are equivalent.

Advanced Lookup

A deeper per-domain analysis that includes comprehensive DKIM discovery and IP geolocation. It takes longer than QuickScan but returns richer context for security and compliance reviews.

Output fields:
Timestamp, Domain, MX, Email Gateway, SPF, SPF Main Lookup Count, SPF Nested Lookup Count, SPF Total Lookups, SPF Email Senders, SPF Limit, DKIM Hosts, DKIM Selectors, DKIM, DMARC, DMARC Policy (p), DMARC RUA, DMARC RUF, TXT, A, AAAA, SOA, BIMI, SRV, NS, Technology Listed In DNS, City, Region, Country, Latitude, Longitude

• When to use: Deeper validation, DKIM/DMARC/SPF analysis, and location context.
• Input modes: Advanced Lookup (text box) and Advanced Upload .txt/.csv (file upload) are equivalent.

Other Tools in DNS Explorer

• Reverse IP Lookup — Map an IPv4 to related host/domain context.
• Subdomain Lookup — Enumerate subdomains via multiple discovery methods.
• Email Explorer — Produce DNS-centric reports for email domains at scale.
• My Domains — Save frequently-queried domains and DKIM selectors.
• Match / Compare / Merge — Join CSVs on a shared header to unify datasets.
• Domain Profile Report — Generate shareable, single-domain PDF reports.
• .csv Combinator — Combine many like-structured CSVs into one file.
• DNSai Assistant — Guided help for lookups, reporting, and data prep.

Screenshots

Module Details

Subdomain Lookup

• Per-domain reconnaissance to identify subdomains from multiple sources.
• Time per domain varies with scope and provider responsiveness.
• Batch limits: up to 100 domains; best results with ≤ 20 per run.

Reverse IP Lookup

Input example (IPv4):

3.163.165.128
3.163.165.90
3.163.165.64
3.163.165.66

Typical output includes: IP Address, mx_records, PTR Hostname, host_domain_name, registrar, whois_server, updated_date, name_servers, status, emails, dnssec, name, org, address, city, region, country, latitude, longitude. Some targets may not yield data due to provider or network security policies.

Email Explorer

• Input: Upload a .csv or .txt with email addresses; set an output destination.
• Limits: Up to 100,000 rows and 26 columns per CSV.
• Tip: For best performance, scan ~1,000 rows at a time.

My Domains

Save domain sets you query regularly and include known DKIM selectors such as:

• selector1._domainkey
• selector2._domainkey
• google._domainkey
• custom._domainkey

Domain Profile Report

• Generate a concise, shareable PDF per domain (optional logo/image supported).
• Batch limit: 20 domains per run.
• Advanced DKIM Search significantly increases runtime; if you already know selectors, add them via My Domains.

.csv Combinator

• Place all CSVs to merge in a single folder.
• All files must share identical headers (names and order) for a clean merge.
• Select an output path to generate the combined CSV.