host.tools

IP WHOIS

IP /api/v1/ip/whois

Direct port-43 WHOIS at the appropriate RIR (ARIN, RIPE, APNIC, LACNIC, AFRINIC).

Try: 1.1.1.1 8.8.8.8 9.9.9.9 2606:4700:4700::1111 10.0.0.0/8
Related: IP geolocation IP WHOIS ASN lookup Reverse IP / hosted domains Multi-region ping Port scanner Traceroute (live)
9.9.9.9 whois.arin.net
NetName
CLEAN-97
CIDR
9.9.9.0/24
Org
Quad9
Country
US
Registered
2017-09-13
Updated
2025-10-21
Abuse
[email protected]
NetHandle
NET-9-9-9-0-1
Raw WHOIS response 
#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#


#
# Query terms are ambiguous.  The query is assumed to be:
#     "n 9.9.9.9"
#
# Use "?" to get help.
#

NetRange:       9.9.9.0 - 9.9.9.255
CIDR:           9.9.9.0/24
NetName:        CLEAN-97
NetHandle:      NET-9-9-9-0-1
Parent:         NET9 (NET-9-0-0-0-0)
NetType:        Direct Allocation
OriginAS:       
Organization:   Quad9 (CLEAN-97)
RegDate:        2017-09-13
Updated:        2025-10-21
Comment:        Geofeed https://www.pch.net/geofeed.csv
Ref:            https://rdap.arin.net/registry/ip/9.9.9.0


OrgName:        Quad9
OrgId:          CLEAN-97
Address:        CleanerDNS Inc. dba Quad9
Address:        1442A Walnut Street, Suite 501
City:           Berkeley
StateProv:      CA
PostalCode:     94709
Country:        US
RegDate:        2017-09-07
Updated:        2025-01-10
Comment:        https://quad9.net/
Comment:        Global Public Recursive DNS Resolver Service
Ref:            https://rdap.arin.net/registry/entity/CLEAN-97


OrgAbuseHandle: QUADA1-ARIN
OrgAbuseName:   Quad9 Abuse
OrgAbusePhone:  +1-415-831-3129 
OrgAbuseEmail:  [email protected]
OrgAbuseRef:    https://rdap.arin.net/registry/entity/QUADA1-ARIN

OrgNOCHandle: QNO5-ARIN
OrgNOCName:   Quad9 Network Operations
OrgNOCPhone:  +1-415-831-3129 
OrgNOCEmail:  [email protected]
OrgNOCRef:    https://rdap.arin.net/registry/entity/QNO5-ARIN

OrgTechHandle: KARAD10-ARIN
OrgTechName:   Kara, Darren 
OrgTechPhone:  +1-703-929-8954 
OrgTechEmail:  [email protected]
OrgTechRef:    https://rdap.arin.net/registry/entity/KARAD10-ARIN

OrgTechHandle: SHRES60-ARIN
OrgTechName:   Shrestha, Kabindra 
OrgTechPhone:  +1-415-831-3111 
OrgTechEmail:  [email protected]
OrgTechRef:    https://rdap.arin.net/registry/entity/SHRES60-ARIN

OrgTechHandle: QNO5-ARIN
OrgTechName:   Quad9 Network Operations
OrgTechPhone:  +1-415-831-3129 
OrgTechEmail:  [email protected]
OrgTechRef:    https://rdap.arin.net/registry/entity/QNO5-ARIN


#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#
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How to use IP WHOIS
  1. 1
    Paste your input

    Enter the value at the top — domain, IP, URL, email, ASN, hash, whatever fits this tool. The smart input auto-detects type.

  2. 2
    Click "Inspect"

    host.tools issues real probes (DNS, HTTP, TCP, TLS, WHOIS where applicable) and renders the result in milliseconds.

  3. 3
    Open the API tab

    Every web tool has a sibling /api/v1/ip/whois JSON endpoint with the same payload. One copy-as-curl click and you're scripting it.

Why this matters

Every IP tells a story — what network it lives on, who owns it, where it sits, whether it's been used for abuse. The smartest decisions about traffic start with a 30-second IP review.

API equivalent
/api/v1/ip/whois?q=9.9.9.9 
curl -s '/api/v1/ip/whois?q=9.9.9.9'
Embed this tool
<iframe src="/ip/whois?q={INPUT}&embed=1"
  width="100%" height="600" frameborder="0"></iframe>

Drop into any HTML page. The embed=1 flag hides nav and footer.

FAQ · IP WHOIS

Common questions

Is IP WHOIS free?
Yes — every tool is free on the web with a 200/hour rate limit per IP. The matching API endpoint /api/v1/ip/whois is free up to 100 requests/hour, no key required.
Where does the data come from?
Real-time probes against authoritative sources (DNS root, RIRs, registries, the target server itself), plus partner data feeds from hostinfo.com (GeoIP/ASN) and hostcheck.com (reputation).
How fresh are the results?
Live by default. Cached for 5 minutes to make repeat queries instant; pass ?nocache=1 for a forced refresh.
Can I run this from the command line?
Yes — every tool ships with a copy-as-curl. There's also an official CLI: host.tools ip whois YOUR_INPUT.
Can I monitor results over time?
Pro tier lets you schedule any tool to run every 1/5/15/60 min and alert on diff. See monitors.
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Run IP WHOIS on a schedule. Get pinged when it changes.

Pro gets you bulk lookups, monitors, webhook alerts, history, exports and 10,000 API calls/day. $19/mo.

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  • ✓Diff against last run, alert on change
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  • ✓Bulk CSV upload, 1,000 inputs per job
  • ✓Export results as CSV / NDJSON / Excel
  • ✓90-day history, comparison view