IP Lookup

Everything about an IP address in one report — reverse DNS, ASN, network owner (RDAP/WHOIS), geolocation, hosted domains, and blacklist status. Leave the field blank to look up your own IP.

IP address (IPv4)

216.73.217.62

Columbus, United States · AS16509 Amazon.com, Inc.

Reverse DNS (PTR)

All nameservers failed to answer the query 62.217.73.216.in-addr.arpa. IN PTR: Server Do53:1.1.1.1@53 answered SERVFAIL; Server Do53:1.0.0.1@53 answered SERVFAIL; Server Do53:8.8.8.8@53 answered SERVFAIL; Server Do53:8.8.4.4@53 answered SERVFAIL

Network owner (RDAP / WHOIS)

Network
AWS-ANTHROPIC
Range
216.73.216.0/22
Organisation
Anthropic, PBC
Abuse contact
[email protected]
Allocated
2024-06-05

Autonomous System (ASN)

AS number
AS16509
Name
AMAZON-02 — Amazon.com, Inc., US
Prefix
216.73.216.0/22
RIR
arin · US

Geolocation

Location
Columbus, Ohio, United States
ISP
Amazon.com, Inc.
Coordinates
39.9612, -82.9988 · map

Domains hosted on this IP

No domains found for this IP

Blacklist (DNSBL)

Listed on 1 of 9

Geolocation from DB-IP (CC BY 4.0); network data via RDAP; hosted domains from Certificate Transparency.

CLI Usage

curl nettools.me/ip-lookup?q=8.8.8.8

About the IP lookup tool

This tool answers “tell me everything about this IP address” in a single report. Enter any IPv4 or IPv6 address — or leave the box blank to inspect your own — and it runs six lookups at once and assembles the results: reverse DNS, ASN, network registration, geolocation, hosted domains, and blacklist status.

Each section comes from an authoritative source. The network owner and abuse contact come from the regional registry's RDAP service (the modern replacement for WHOIS); the ASN comes from Team Cymru; reverse DNS from live PTR records; geolocation from DB-IP; the list of domains hosted on the IP from our Certificate Transparency index; and the blacklist status from a set of major DNSBLs.

It is built for the common tasks where you have an IP and need context: investigating a suspicious address from a log, checking who a server belongs to, seeing what else is hosted alongside a site, or confirming a mail server's IP is not blacklisted.

Frequently asked questions

What does the IP lookup tool show?

It gathers everything public about an IP address into one report: its reverse DNS (PTR) hostname, the Autonomous System (ASN) and network it belongs to, the RDAP/WHOIS registration (owning organisation and abuse contact), its approximate geolocation, other domains hosted on the same IP, and whether it appears on email blacklists.

How do I find out who owns an IP address?

The Network owner (RDAP/WHOIS) section shows the organisation the IP block is registered to, the network range, and the abuse contact — pulled live from the regional internet registry (ARIN, RIPE, APNIC, and so on) via RDAP. The ASN section shows which network operator announces it.

What is the difference between this and a WHOIS lookup?

A domain WHOIS looks up a domain name; this looks up an IP address and combines IP WHOIS (RDAP) with reverse DNS, ASN, geolocation, hosted-domain, and blacklist data — so you get the full picture in one place instead of running five separate tools.

Can I look up an IPv6 address?

Yes. Reverse DNS, ASN, RDAP, geolocation, and hosted domains all support IPv6. The DNSBL blacklist check is IPv4-only, so it is skipped for IPv6 addresses.