4R.cz

Your IP address

216.73.216.10

us Columbus, United States · AS16509 Amazon.com, Inc. · AWS-ANTHROPIC

JSON

Address

Version
IPv4
Numeric
3628718090
IPv4-mapped
::ffff:216.73.216.10
Registry object
ip network

Speed test

Location

Country
United States us
City
Columbus
ASN
AS16509
Organisation
Amazon.com, Inc.
Source
GeoLite2

Geolocation is an estimate, not registry data.

Network

Network name
AWS-ANTHROPIC
Registry handle
NET-216-73-216-0-1
Range
216.73.216.0 – 216.73.219.255
CIDR
216.73.216.0/22
Type
ASSIGNMENT
IP version
v4
Parent range
NET-216-73-208-0-1
Abuse contact
arin@anthropic.com
WHOIS server
whois.arin.net
Status
active Active - no restrictions

Reverse DNS

PTR hostname
No PTR record
Forward addresses
—
FCrDNS
Not applicable

Forward-confirmed reverse DNS (FCrDNS) means the PTR name resolves back to the same address.

Dates

Last changed
2024-06-05 16:42 UTC
Registered
2024-06-05 16:42 UTC
Contacts

registrant AP-2440

Name
Anthropic, PBC
Kind
org

administrative, routing, dns, abuse, noc, technical ANTHR5-ARIN (nested in registrant)

Name
Anthropic
Organisation
Anthropic, PBC
Kind
group
E-mail
arin@anthropic.com
Phone
+1-415-236-0599

Registries redact personal data; redacted fields are listed under Registry notes.

Registry notes

Terms of Service

By using the ARIN RDAP/Whois service, you are agreeing to the RDAP/Whois Terms of Use

https://www.arin.net/resources/registry/whois/tou/

Whois Inaccuracy Reporting

If you see inaccuracies in the results, please visit:

https://www.arin.net/resources/registry/whois/inaccuracy_reporting/

Copyright Notice

Copyright 1997-2026, American Registry for Internet Numbers, Ltd.

RDAP conformance

nro_rdap_profile_0rdap_level_0cidr0arin_originas0

Links published by the registry

  • self https://rdap.arin.net/registry/ip/216.73.216.0
  • alternate https://whois.arin.net/rest/net/NET-216-73-216-0-1
  • up https://rdap.arin.net/registry/ip/216.73.208.0/21

HTTP request headers

Max-Forwards
7
X-Php-Requestid
2bd50a08f57c01e80d3d3bd31453341f
X-Php-Upstream
r4-u20-php85-fpm16
Ws-Geo-Country
US
Accept-Encoding
gzip, br, zstd, deflate
User-Agent
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
Accept
*/*
Ws-Client-Port
2895
X-Proxy-Ip
10.20.5.1
Https
1
X-Forwarded-Proto
https
X-Forwarded-For
216.73.216.10
X-Real-Ip
216.73.216.10
Host
www.4r.cz

Your browser

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Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)

Request: GET · HTTP/1.1 · Port 443 · HTTPS

Referrer: direct request

Related tools for this address

Raw RDAP response