What is Bulk IP Lookup?
Bulk IP Lookup lets you analyse multiple IP addresses in one operation instead of one by one. Enter up to 20 IPs and get a full intelligence report for each: country, state, city, postal code, ISP, organisation, ASN, timezone, GPS coordinates, and four security flags (proxy, VPN, Tor exit node, datacenter). Each row has an expandable section with additional metadata including hostname, currency, calling code, and language.
This is indispensable for security analysts reviewing access logs, developers enriching user data, administrators auditing firewall activity, and researchers studying traffic distribution. Export the complete dataset to CSV (compatible with any spreadsheet app) or native Excel .xlsx with formatted columns.
How to Use It?
Paste up to 20 IP addresses into the text area, one per line. Click 🔍 Lookup All. Progress updates as each IP is processed. When complete, the results table appears. Click + More on any row to expand additional fields. Use ↓ CSV or ↓ Excel to download all data.
💡 Real-World Example
Example: A support team exports 18 IP addresses from their firewall's "blocked connections" log over the past week. Pasting all 18 into Bulk IP Lookup and clicking Lookup All produces a single Excel sheet showing each IP's country, ISP and proxy/VPN flags — ready to attach to an incident report.
🔎 Network Audit Examples
Bulk IP Lookup is commonly used for periodic infrastructure audits — quickly confirming that a list of server/service IPs still resolve to the expected providers, locations and ASNs.
💡 Example: Cloud Migration Verification
A company migrated 15 servers from one cloud provider to another. After the migration, they paste all 15 server IPs into Bulk IP Lookup and export to Excel. The ASN Holder column should now show the NEW provider's name for every row — any row still showing the OLD provider indicates a server that wasn't migrated or a DNS record still pointing to the old IP.
💡 Example: Reverse DNS Consistency Check
A mail administrator manages 8 outbound mail server IPs. Best practice requires each IP's Reverse DNS (PTR) record to resolve to a hostname matching the sending domain (e.g. mail1.company.com). Running all 8 IPs through this tool with "Include Reverse DNS" enabled quickly shows which servers are MISSING a proper PTR record — a common cause of emails being flagged as spam.
🔐 Security Monitoring Use Cases
Firewall log triage
Export the top 20 source IPs from a firewall's "blocked connections" log over the past 24 hours. The Proxy/VPN/Tor/DC columns instantly highlight which sources are likely automated scanners vs residential users.
Login attempt review
For a list of IPs that attempted to log into an admin panel, the ASN Holder and Country columns reveal whether attempts are clustering from a specific hosting provider or region — useful evidence for geo-blocking decisions.
Allow-list validation
Before adding a batch of partner/vendor IPs to a firewall allow-list, run them through this tool to confirm they resolve to the EXPECTED organization — catching typos or outdated IPs before they create a security gap.
Incident response documentation
During an incident, export the Excel report of all IPs involved (with timestamps added manually) as part of the incident documentation — the ASN/Country/Hosting columns provide useful context for the writeup without manual lookups.
📋 CSV Format Guide for Upload
The CSV/TXT Upload feature is flexible — it scans the ENTIRE file for anything that looks like an IPv4 or IPv6 address, regardless of file structure. All of the following formats work:
| File Format | Example Content | Result |
|---|
| Plain text, one IP per line | 1.1.1.1
8.8.8.8
142.250.80.46 | ✅ All 3 IPs extracted |
| CSV with header row | ip_address,date,notes
1.1.1.1,2026-06-01,test
8.8.8.8,2026-06-02,prod | ✅ Both IPs extracted (header text ignored automatically) |
| Firewall log excerpt | Jun 14 10:22:01 BLOCK src=45.33.10.21 dst=192.168.1.5 | ✅ 45.33.10.21 extracted (private IPs like 192.168.x.x are also extracted — remove manually if not needed) |
| Mixed IPv4 + IPv6 | 1.1.1.1
2606:4700:4700::1111 | ✅ Both formats supported |
Limits: Only the first 20 unique IPs found in the file are kept (matching the per-lookup limit). If your file has more, split it into multiple batches. Duplicate IPs are automatically removed before counting toward the limit.
📊 Understanding Your Results
Status (⚑)
A checkmark means data was successfully retrieved. A cross (✗) means the IP is private, invalid, or no geolocation data exists for it.
Proxy / VPN / Tor / DC columns
Each shows "Yes" or "No" independently. An IP can be flagged Yes on multiple columns at once (e.g. a VPN running on a datacenter server is both VPN=Yes and DC=Yes).
+More (expandable row)
Reveals hostname, currency, calling code and language — useful for localisation decisions or deeper investigation without cluttering the main table.
Export columns (22 total)
Both CSV and Excel exports always include all 22 fields, even ones hidden in the table view — so you never lose data by exporting.
⚠️ Common Errors & What They Mean
❌ "Maximum 20 IPs allowed"
You've pasted more than 20 lines. Remove extra lines or split your list into multiple batches of 20.
⚠️ Some rows show all dashes (—)
These are private/reserved IPs (10.x.x.x, 192.168.x.x, 127.x.x.x) which have no public geolocation data — this is expected, not a failure of the tool.
💾 Excel export shows "#####" in a column
This is a standard Excel column-width display issue, not a data error. Simply widen the column by double-clicking its right border.
💡 Advanced Tips
📋
Paste directly from logs
Most firewall/server logs have one IP per line already — you can often paste a filtered log section directly without reformatting.
📊
Sort by risk in Excel
After exporting, sort by the Proxy/VPN/Tor/DC columns to quickly group all flagged IPs together for review.
🔄
De-duplicate first
If your log has repeated IPs, remove duplicates before pasting — this saves your 20-IP allowance for unique addresses.
🛡️
Document incidents
The Excel export with timestamps added manually makes a ready-made attachment for security incident reports or abuse complaints to hosting providers.
📜 Bulk IP Lookup vs Single IP Lookup
| Scenario | Recommended Tool |
|---|
| Checking 1–2 specific IPs with full detail (map, ASN) | IP Lookup |
| Processing a list of 5–20 IPs from logs | Bulk IP Lookup (this tool) |
| Need a downloadable report for a team/manager | Bulk IP Lookup → Excel export |
| Checking if IPs are on spam blacklists | Blacklist Check (run per-IP) |
FAQ
How many IPs can I look up? +
Up to 20 IPs per session. For larger datasets run multiple sessions.
✍️ Author: ToolsNovaHub Editorial Team
•
✅ Reviewed by: ToolsNovaHub Security & Network Team
•
📅 Last Updated: 12 June 2026
What fields are in the export? +
22 fields: IP, Status, Flag, Country, State, City, ZIP, ISP, Organization, ASN, Timezone, Latitude, Longitude, Proxy, VPN, Tor, Mobile, Datacenter, Hostname, Currency, Calling Code, Language.
Do private IPs return data? +
Private IPs (192.168.x.x, 10.x.x.x) are not publicly routable and return no geolocation data. Status shows a cross mark.
Can I use this for fraud detection? +
Yes. Proxy, VPN, Tor, and datacenter flags are useful for identifying suspicious sign-ups. Use alongside other signals for best results.
Why do some IPs return incomplete data? +
Some IPs from newer IPv6 allocations or less-covered regions may have incomplete database coverage. Results show whatever our sources collectively have.