ViewDNS.info vs Central Ops

How do ViewDNS.info and Central Ops compare? Here are the facts side by side: pricing, platforms, open-source status and what each one is for.

Directory details: ViewDNS.info and Central Ops
Directory detail	ViewDNS.info	Central Ops
What it is	ViewDNS.info is a web-based collection of DNS, domain, and IP lookup tools, including reverse IP, WHOIS, DNS records, subdomain discovery, port scanning, and traceroute. It also offers an API for domain and IP data.	Central Ops provides online network tools including traceroute, nslookup, and WHOIS, with a related WHOIS API.
Website	viewdns.info	centralops.net
Type	Website	Website
Topic	Website & URL Scanners	Website & URL Scanners
Pricing	Freemium	Not confirmed
Platforms	Web	Web
Open source	Not stated	Not stated
Language	English	—
Alternatives	17 alternatives	4 alternatives