Unverified50% confidenceFactExact time
A PTR record (Pointer Record) is the core resource record type for reverse DNS resolution, pointing an IP address to a domain name.
1
Sources
50%
Confidence
Long-term
Relevance
9/12/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedThe receiving server queries the PTR record of the sending IP to verify whether the reverse lookup result matches the domain name claimed by the sender; a missing PTR record or a generic hostname is treated as a spam signal.78% similarVerifiedAn A record is used to map a domain name directly to an IPv4 address, while a CNAME record is used to point one domain name to another domain name.70% similarUnverifiedDNS (Domain Name System) is responsible for translating human-readable domain names into machine-readable IP addresses.70% similarUnverifiedDNS resolvers cache queried records in memory so that subsequent queries for the same domain name can return results directly without the need for recursive queries again.68% similarVerifiedSPF通过DNS TXT记录声明哪些IP地址被授权代表某域名发送邮件64% similar
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Stable URI
https://kongchang.com/claim/914006API
curl https://kongchang.com/api/v1/knowledge/claims/914006MCP
get_claim(id=914006)