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)
2606:4700:4700::1111 whois.arin.net
NetName
CLOUDFLARENET
CIDR
2606:4700::/32
Org
Cloudflare, Inc.
Country
US
Registered
2011-11-01
Updated
2024-09-04
Abuse
[email protected]
NetHandle
NET6-2606-4700-1
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 2606:4700:4700::1111"
#
# Use "?" to get help.
#

NetRange:       2606:4700:: - 2606:4700:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF
CIDR:           2606:4700::/32
NetName:        CLOUDFLARENET
NetHandle:      NET6-2606-4700-1
Parent:         NET6-2600 (NET6-2600-1)
NetType:        Direct Allocation
OriginAS:       
Organization:   Cloudflare, Inc. (CLOUD14)
RegDate:        2011-11-01
Updated:        2024-09-04
Comment:        All Cloudflare abuse reporting can be done via https://www.cloudflare.com/abuse
Comment:        Geofeed: https://api.cloudflare.com/local-ip-ranges.csv
Ref:            https://rdap.arin.net/registry/ip/2606:4700::



OrgName:        Cloudflare, Inc.
OrgId:          CLOUD14
Address:        101 Townsend Street
City:           San Francisco
StateProv:      CA
PostalCode:     94107
Country:        US
RegDate:        2010-07-09
Updated:        2024-11-25
Ref:            https://rdap.arin.net/registry/entity/CLOUD14


OrgAbuseHandle: ABUSE2916-ARIN
OrgAbuseName:   Abuse
OrgAbusePhone:  +1-650-319-8930 
OrgAbuseEmail:  [email protected]
OrgAbuseRef:    https://rdap.arin.net/registry/entity/ABUSE2916-ARIN

OrgRoutingHandle: CLOUD146-ARIN
OrgRoutingName:   Cloudflare-NOC
OrgRoutingPhone:  +1-650-319-8930 
OrgRoutingEmail:  [email protected]
OrgRoutingRef:    https://rdap.arin.net/registry/entity/CLOUD146-ARIN

OrgNOCHandle: CLOUD146-ARIN
OrgNOCName:   Cloudflare-NOC
OrgNOCPhone:  +1-650-319-8930 
OrgNOCEmail:  [email protected]
OrgNOCRef:    https://rdap.arin.net/registry/entity/CLOUD146-ARIN

OrgTechHandle: ADMIN2521-ARIN
OrgTechName:   Admin
OrgTechPhone:  +1-650-319-8930 
OrgTechEmail:  [email protected]
OrgTechRef:    https://rdap.arin.net/registry/entity/ADMIN2521-ARIN

RTechHandle: ADMIN2521-ARIN
RTechName:   Admin
RTechPhone:  +1-650-319-8930 
RTechEmail:  [email protected]
RTechRef:    https://rdap.arin.net/registry/entity/ADMIN2521-ARIN

RAbuseHandle: ABUSE2916-ARIN
RAbuseName:   Abuse
RAbusePhone:  +1-650-319-8930 
RAbuseEmail:  [email protected]
RAbuseRef:    https://rdap.arin.net/registry/entity/ABUSE2916-ARIN

RNOCHandle: NOC11962-ARIN
RNOCName:   NOC
RNOCPhone:  +1-650-319-8930 
RNOCEmail:  [email protected]
RNOCRef:    https://rdap.arin.net/registry/entity/NOC11962-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.
#
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=2606%3A4700%3A4700%3A%3A1111 
curl -s '/api/v1/ip/whois?q=2606%3A4700%3A4700%3A%3A1111'
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.
host.tools Pro

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.

See pricing Tour monitors
  • ✓Schedule any tool — every 1, 5, 15, 60 min
  • ✓Diff against last run, alert on change
  • ✓Webhook + email + Slack + PagerDuty + OpsGenie
  • ✓Bulk CSV upload, 1,000 inputs per job
  • ✓Export results as CSV / NDJSON / Excel
  • ✓90-day history, comparison view