What is my hostname?
A hostname from reverse Domain Name System is a name that points back to your public Internet Protocol address. Not every Internet Protocol address has one.
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Reverse DNS (PTR)
Reverse DNS hostnames explained
A reverse DNS (PTR) hostname is a human-readable name that points back to a public IP. Providers sometimes publish names like customer blocks or infrastructure labels; many residential and mobile IPs publish none at all.
This page looks up the PTR for the public IP of your current connection. No hostname is normal and does not mean your connection is broken.
When a hostname is useful
Hostnames help when diagnosing mail reputation, verifying that an IP belongs to an expected provider, or reading clues alongside ISP and ASN tools. You usually cannot set a PTR yourself on home broadband—your ISP controls it.
If you use a VPN, the hostname (if any) reflects the exit IP, not your home router’s LAN name.
Learn more
Hostnames are one clue next to ISP and ASN. See the ASN/ISP guide for context.
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Frequently Asked Questions
What is a hostname?
A hostname is a human-readable name for a network host. For your public Internet Protocol address, reverse Domain Name System (pointer) may return a hostname if your provider published one, many residential IPs have none.
Why is there no hostname?
Many residential IPs do not publish pointer records. Timeouts and missing records are normal and do not mean your connection is broken.
What is reverse Domain Name System (pointer)?
Reverse Domain Name System (pointer) maps an Internet Protocol address back to a hostname. Forward Domain Name System maps a name to an Internet Protocol address. Not every public Internet Protocol address has a pointer record.
Can I set my own hostname?
Residential users usually cannot set pointer records, your Internet Service Provider controls them. Cloud and business customers can often request a pointer for IPs they control.
Does a missing hostname mean a problem?
No. Missing pointer records are common for home and mobile IPs and do not affect normal browsing.