IP Address Lookup & Diagnostics
Autonomous system, reverse DNS and routing info.
- Runs in your browser
- Free, no signup
Lookup Results for 216.73.216.41
- IP Version
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- Address Scope
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- Reverse Hostname
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- Autonomous System
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- RIR Registry
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- Integer Format
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- Hexadecimal
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- Binary Format
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Queried IP addresses are resolved against standard routing databases and are never logged or stored.
The IP Lookup tool provides technical diagnostics for any IPv4 or IPv6 address. Enter an address to inspect its reverse DNS hostname, address classification (public, private, loopback, link-local), Autonomous System Number (ASN), and integer/hex representations.
All routing data is fetched from authoritative internet infrastructure. We do not invent fake GPS coordinates or claim unverified physical locations.
How to use this tool
- Enter an IPv4 (e.g., 8.8.8.8) or IPv6 address (e.g., 2001:4860:4860::8888) into the input field.
- Click Lookup IP or press Enter to query the network details.
- Inspect the reverse DNS PTR hostname, Autonomous System name, and binary/hex conversion rows.
Autonomous Systems (ASNs) explained
The internet is a collection of thousands of independent networks known as Autonomous Systems (AS). Each major telecom provider, cloud host, and university operates an Autonomous System identified by an ASN (such as AS15169 for Google or AS13335 for Cloudflare).
By mapping an IP address to its ASN, developers can quickly determine which hosting company, internet service provider, or data centre owns the network routing the traffic.
Alternative IP representations
While humans read IPv4 as four decimal numbers separated by dots, computers process IP addresses as 32-bit integers. An address like 8.8.8.8 can be represented as the integer 134744072, in hexadecimal as 0x08080808, or in raw binary.
Inspecting these formats helps software engineers working with low-level socket programming, database bitwise masks, and subnet mathematics.
Frequently asked questions
Can I look up an IPv6 address?
Yes. Full IPv6 addresses, compressed formats (with ::), and standard IPv4 addresses are supported.
What is reverse DNS (PTR)?
Forward DNS maps a domain name to an IP address (A record). Reverse DNS maps an IP address back to its registered domain name using a PTR record in in-addr.arpa or ip6.arpa.