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dns-cname-old-subdomain
x402
dns-cname-old-subdomain is a paid API for AI agents from dns.intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-20).
Looks up the CNAME DNS record for the 'old' subdomain of a given domain via Cloudflare DoH and reports whether it exists, its records, and TTL.
Price / call$0.01
Success—
StatusUnknown
How this service works
CNAME record of old.<domain>: looks up the old 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 old without enumerating subdomains. $0.01 per lookup.
Output
Returns whether the CNAME record for old.<domain> exists, the record value(s) it points to, the TTL in seconds, and the DNS response code — all resolved via Cloudflare DNS over HTTPS.
Example use cases
Check legacy subdomain before migration
“Before we retire our old website, can you check if old.acmecorp.com has a CNAME record still pointing somewhere in DNS?”
Investigate potential domain takeover risk
“I want to know if old.startupbrand.io has an active CNAME record — I'm checking for dangling DNS entries that could be hijacked.”
Audit competitor's subdomain infrastructure
“Can you look up whether old.competitor.com resolves as a CNAME and tell me what it points to and the TTL?”
Technical details
Endpoint
GEThttps://dns.intel.rallylive.ca/dns/host/old/cname?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a fast, cheap ($0.01) existence check for the 'old' subdomain CNAME of a specific domain without running a full subdomain enumeration. Prefer it over general DNS tools when you specifically need the 'old' host checked via Cloudflare DoH for consistency and reliability.
Side effects
- Domain does not exist — NXDOMAIN response with no records returned
- No CNAME record for old.<domain> — record type not found but domain may exist
- Invalid or malformed domain input — request may fail or return empty
- Cloudflare DoH upstream timeout — service may return an error or delayed response
- Rate limiting or payment failure — 402 response if x402 payment not processed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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