Reverse IP (reverseip.ch) compared with ViewDNS.info, DomainTools and SecurityTrails| Reverse IP (reverseip.ch) | ViewDNS.info | DomainTools | SecurityTrails |
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| Input and output: You give an IP address and get the sites hosted at that address, the so-called IP neighbors. The service then forwards you to its own domain service, so use the back button to return to the lookup. | Input and output: Reverse IP Lookup is one of several free DNS tools on the site, next to the DNS Propagation Checker, the Chinese Firewall Test and a DNS Report. | Input and output: The Reverse IP API takes a domain name, not an IP address, and returns other domains sharing the same IP. Output is JSON by default, or XML and HTML. Lookups by IP go through the separate Host Domains API. | Input and output: The API exposes DNS History, Subdomains, WHOIS History, Associated Domains, IP Subnet and PTR Search endpoints, with both current and historical data. |
| Completeness of results: The operator does not claim that the results are exhaustive. A comparison against other services reported more results here than elsewhere. | | Completeness of results: Each domain is tracked against one IP only, typically the lowest, so the list is a subset. High-volume IPs such as CDNs and large cloud providers cannot be fully enumerated, and a domain_count above the returned count signals truncation. | |
| Access and cost model: Used as a web lookup. No pricing or account information is given in the service description. | Access and cost model: A free personal tier exists, and a proprietary licence is sold as a one-time purchase for a perpetual licence, according to a third-party software listing. | Access and cost model: Served through api.domaintools.com/v1. Authentication and account requirements are documented on a separate page. | Access and cost model: The API is paid through a pricing structure aimed at embedding data in applications. Keys are requested through a sign-up or demo request, and IP DSL queries require the professional plan or higher. |
| | | Ownership and product status: The site labels SecurityTrails as a Recorded Future company, and the Attack Surface Intelligence product page is now hosted at Recorded Future. |