8 services carry this tag in their source record. Tags come from the provider, not from us — a tag is a claim about what the service does, not proof that it does it well.
A record of sip.<domain>: looks up the sip host under the domain you give (A via Cloudflare DoH) and reports whether it exists, its records and TTL. Quick existence check for common hosts like sip without enumerating sub...
AAAA record of sip.<domain>: looks up the sip host under the domain you give (AAAA via Cloudflare DoH) and reports whether it exists, its records and TTL. Quick existence check for common hosts like sip without enumerati...
CNAME record of sip.<domain>: looks up the sip host under the domain you give (CNAME via Cloudflare DoH) and reports whether it exists, its records and TTL. Quick existence check for common hosts like sip without enumera...
TXT record of sip.<domain>: looks up the sip host under the domain you give (TXT via Cloudflare DoH) and reports whether it exists, its records and TTL. Quick existence check for common hosts like sip without enumerating...
SIP service discovery (_sip._tcp.<domain>): SRV records with priority, weight, port and target host, from Cloudflare DoH. Tells a client where the domain's sip service lives without guessing hosts. $0.01 per lookup.
SIP service discovery (_sip._udp.<domain>): SRV records with priority, weight, port and target host, from Cloudflare DoH. Tells a client where the domain's sip service lives without guessing hosts. $0.01 per lookup.
DNS SRV record lookup: service records (SIP, XMPP, LDAP, Minecraft, Kerberos and others) with priority, weight, port and target host, parsed. Service discovery for a domain. $0.01 per lookup.
Is TCP port 5060 (SIP) open on a host? Attempts a connection from Cloudflare's edge and reports open/closed/filtered with the connect time; Cloudflare-fronted hosts are reported as inconclusive because their edge answers...