ipfw.net_

IP Lookup & Firewall Checker

Your Public IP Address is 216.73.217.51

Network Information

CityColumbus
CountryUS
Country CodeUS
Latitude39.96118
Longitude-82.99879
Postal Code43215
ASNAS16509
OrganizationAnthropic, PBC
ISP NameAnthropic, PBC

Port Reachability Test

Check your firewall rules, probe a TCP port from outside.

Testing port on target IP...

Command Line Interface

IP Lookup

$ curl ipfw.net
::1

$ curl -4 ipfw.net
127.0.0.1

$ curl -4 ipfw.net?json
{
  "ip": "127.0.0.1",
  "city": "Foo City",
  "country": "Foo Country",
  "countryCode": "XX",
  "latitude": "1.234",
  "longitude": "2.345",
  "postalCode": "1234",
  "asn": "0000",
  "organization": "Foo Organization",
  "isp": "Foo ISP"
}

$ curl ipfw.net/8.8.8.8?json
{
  "ip": "8.8.8.8",
  "city": "None",
  "country": "United States",
  "countryCode": "US",
  "latitude": "37.751",
  "longitude": "-97.822",
  "postalCode": "None",
  "asn": "15169",
  "organization": "Google",
  "isp": "Google"
}

Port Testing

$ curl ipfw.net/80
open

$ curl ipfw.net/8.8.8.8/53
open

$ curl ipfw.net/8.8.8.8/53?json
{
  "ip": "8.8.8.8",
  "port": 53,
  "status": "open"
}

Statuses Explained

open
Port is reachable and accepting TCP connections.
refused
Actively rejected (TCP RST). Either no service is listening, or blocked by a firewall REJECT rule.
timedout
No response after 2.5s. Usually indicates a firewall is silently dropping packets.
unreachable
A network error prevented the connection (e.g., no route to host).
unknown
An unknown error occurred during the test.