IP Address Lookup

IP Address Lookup: what it is for

Enter an IPv4 or IPv6 address or a domain and see where the IP is from: approximate country, region and city, the provider or company that owns the block and its ASN, the time zone, the coordinates on a map, the reverse DNS name (PTR) and whether the IP is listed on spam blocklists such as SpamCop and Barracuda. It also warns when the IP is private or reserved, like 192.168.0.1.

The location is approximate and usually shows the provider's city, not an address.

How to use

1. Enter the IP or domain, or use your own IP.
2. Tap Look up.
3. See the location, the provider and the blocklists.

When to use it

• Find out which country a visit in your site log came from.
• Check whether your mail server's IP is on a spam list.
• See which provider owns an IP.

Frequently asked questions

Is the IP location exact?

No. IP location usually shows the city or region where the provider registered that block of addresses, which can be tens or hundreds of kilometers from the person. You can't find a home address from an IP.

What is an ASN?

The autonomous system number, the network that announces that IP on the internet. It shows which company owns the block: an internet provider, a cloud service like AWS or Google, or a business.

What is reverse DNS (PTR)?

It is the name tied to the IP, the opposite direction of normal DNS. Mail servers usually have a PTR that matches the domain, and many spam filters distrust IPs without one.

What does being on a blocklist mean?

That the IP was seen sending spam or attacks and was listed on an RBL. Mail servers check these lists and may refuse messages from it.

Is it really free?

Yes, 100% free. No sign-up, no subscription and no usage limits. All Tools123 are free.

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