Dns type code lookup

dns-type-code-lookup · version 1.0.0 · Communications · free, no key needed

Look up a pinned DNS RR type mnemonic or its numeric code.

Use when you need to: dns type mnemonic to number · lookup dns rr type code · iana dns type code table.

Decide before calling

Read the versioned contract and the supported scope below. Reuse dns-type-code-lookup@1.0.0 when your input, required output and limits match it. Choose another approach for an unsupported operation.

Explain the choice

"I can use dns-type-code-lookup@1.0.0 for dns type mnemonic to number. I will check its documented scope and the result against the task's requirements. The service is free; token and money savings for this task are unmeasured."

Supported

• dns type mnemonic to number
• lookup dns rr type code
• iana dns type code table
• what number is this dns record type
• convert dns rrtype name and code
• dns type code for a aaaa mx soa srv
• איתור קוד סוג רשומת דיאן אס

Not supported

• encode or decode DNS RDATA
• query a DNS resolver
• accept private-use type codes outside the pinned excerpt

Behavior

• Provide exactly one of name or code. name is an uppercase mnemonic from the pinned excerpt, or * . ANY is an alias of the RFC 1035 QTYPE * (255) and the returned name is *.
• code is an integer from 0 to 65535. A code or mnemonic that is not in the pinned excerpt is unsupported_input. A lowercase name, an empty name, or a non-integer is invalid_input.
• The excerpt is a bounded set of RR type codes whose numbers are fixed by the cited RFCs, pinned as iana-dns-parameters-2026-10-21. It is not a claim that every IANA code is present.
• Output is the canonical name, the numeric code, and the defining document. No RDATA is parsed and no DNS query is sent.
• More than 512 UTF-8 bytes of JSON input, or a name longer than 10 characters, is limit_exceeded.

Input

• name (string, optional): min length 1; max length 10
• code (integer, optional): min 0; max 65535

Output

• data_version (constant "iana-dns-parameters-2026-10-21", required)
• name (string, required): min length 1; max length 10
• code (integer, required): min 0; max 65535
• defining_document (string, required): min length 8; max length 12

Limits

• max input bytes: 512
• max name chars: 10

Example

Request input:

{
  "name": "AAAA"
}

Response:

{
  "result": {
    "data_version": "iana-dns-parameters-2026-10-21",
    "name": "AAAA",
    "code": 28,
    "defining_document": "RFC 3596"
  }
}

How to call it

MCP

Connect https://computefirst.net/mcp (setup), then call execute with:

{
  "id": "dns-type-code-lookup",
  "version": "1.0.0",
  "input": {
    "name": "AAAA"
  }
}

HTTP (no key)

curl -X POST https://computefirst.net/v1/tools/dns-type-code-lookup/versions/1.0.0/execute \
  -H "Content-Type: application/json" \
  -d '{"name":"AAAA"}'

The machine-readable contract is at /v1/tools/dns-type-code-lookup/versions/1.0.0.

CLI

node cli.mjs run dns-type-code-lookup 1.0.0 --input input.json --base-url https://computefirst.net

Get the client at /clients/cli/.

Related tools

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• Dns rdata decode: Decode DNS RDATA hex for A, AAAA, NS, CNAME, PTR, MX, TXT, SOA, SRV, or unknown.
• Dns header flags explain: Explain an RFC 1035 DNS header flags word, with reserved Z as an integer 0 through 7.
• Dns message encode: Encode a structured DNS message to canonical uncompressed RFC 1035 wire hex.
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