OpenVibeNet

About the Hostname Lookup

Resolve a hostname to every address it answers with, or go the other way and find the name registered for an IP.

• Forward resolution to IPv4 and IPv6 addresses
• Reverse resolution from an address to a name
• Shows every record when a host is load balanced

Frequently asked questions

Why does one hostname return several IPs?

Large sites publish multiple addresses for load balancing and redundancy; your resolver picks one.

What if the reverse lookup returns nothing?

Reverse records are optional and set by whoever controls the IP block, so many addresses simply have none.

Related tools

• Domain & IP LookupLook up everything about a domain or IP in one go: DNS records, Whois, geolocation, SSL and HTTP headers. Instant, no signup.
• Reverse DNS LookupRun a reverse DNS lookup to find the PTR hostname for any IPv4 or IPv6 address. Essential for mail server checks. Instant.
• ASN LookupLook up any autonomous system number to see its operator, announced prefixes and peers. BGP and routing information.
• DNS LookupLook up DNS records for any domain: A, AAAA, MX, TXT, CNAME, NS, SOA and more. DNS lookup with instant results.
• ISP LookupIdentify the ISP, hosting company or organisation that owns any IP address, plus its network range. Instant.
• IP Address LookupLook up any IP address to see its owner, network, geolocation, reverse DNS and abuse contact. Supports IPv4 and IPv6. Instant.

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