WHOIS lookup
Look up the registration record of an IP address or a domain name using RDAP, the modern replacement for WHOIS: the network range and its holder, the abuse contact, the registrar and dates, and the nameservers — straight from the responsible registry.
Registry record (RDAP)
- Handle
- 1.178.16.0 - 1.178.31.255
- Name
- STUB-1-178-16SLASH20
- Type
- ALLOCATED PORTABLE
- Range
- 1.178.16.0 – 1.178.31.255 (1.178.16.0/20)
- Registry country
- ZZ
- Abuse contact
- no-email@apnic.net
- Status
- active
- Registered
- Jan 14, 2025
- Last changed
- Sep 23, 2026
- RDAP server
- rdap.apnic.net
Registry remarks
- description: Transferred to the ARIN region on 2025-01-14T09:46:55Z.
Personal names, postal addresses and phone numbers are removed before display; abuse mailboxes are kept.
RDAP (rdap.apnic.net) · Oct 22, 2026, 12:33 PM UTCLook up an IP or domain
Enter an IPv4 or IPv6 address, a network prefix or a domain name. We ask the IANA bootstrap registry which RDAP server is responsible, query it live and show a summarized record; the raw JSON is one click away. Personal names, postal addresses and phone numbers of individuals are dropped before display.
IP WHOIS results
For an address, the record describes the block it belongs to.
Network range and CIDR
The start and end address of the registered block and its prefix notation. Large providers hold one big allocation and sub-assign smaller blocks to customers, which appear as separate records.
Organization and country
The registered holder of the block and the country it was registered in. This is not geolocation — a multinational's block may be registered in one country and used in another.
Abuse contact
The mailbox the holder designates for abuse reports, the correct destination for spam or attack complaints about the address.
Domain WHOIS results
For a domain, the record comes from the registry of its top-level domain.
Registrar and dates
The registrar the domain was bought through, the creation, last-update and expiry dates, and the status codes (for example clientTransferProhibited). Since 2018 most registries redact registrant details; what remains is still useful for checking age and expiry.
Name servers
The authoritative nameservers for the domain, and whether DNSSEC is enabled. Compare with the live NS records from the DNS lookup.
Regional registries (ARIN, RIPE, APNIC, LACNIC, AFRINIC)
IP records live at one of five regional registries, chosen by where the block was allocated; we route the query to the right one automatically. Domain records live at the registry of each top-level domain (Verisign for .com, for instance).
WHOIS vs RDAP
WHOIS (1982) returns free-form text over a plain TCP connection, differently formatted by every registry and without any access control. RDAP (2015) returns structured JSON over HTTPS, with consistent fields, redirects to the right registry and the ability to withhold personal data by policy. The regional registries and ICANN now require RDAP; we use it for every lookup and only fall back to WHOIS-style text when a registry offers nothing else.
Frequently asked questions
Can I check who owns an IP?
You can see which organization holds the block the address belongs to — an ISP, a hosting company, a university — and its abuse contact. Individual subscribers are not published; only the provider knows who used the address at a given time.
What replaced WHOIS?
RDAP (Registration Data Access Protocol): the same registration data as JSON over HTTPS, with consistent fields and privacy controls. This page uses RDAP.
How do I unmask a domain owner?
Registrant details of most domains have been redacted since 2018 under privacy rules. What you can do: contact the registrant through the registrar's relay or contact form shown in the record, or, for legal matters, make a request to the registrar.
Can someone track my IP address?
Anyone can look up the public network information for an address — that is what this page does. Finding the person behind it requires the provider's records, which are released only to authorities with legal basis.
Are IP grabbers illegal?
Logging the address of visitors to your own service is normal and legal. Tricking someone into revealing their address through a disguised link in order to locate, harass or attack them is where it becomes unlawful.
Registration data fetched live over RDAP from the responsible registry via the CheckMyIP lookup service and cached for six hours; the registry and fetch time are shown with each record.