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by mkeedlinger 1051 days ago
I found out about https://www.nslookup.io/learning/ recently, which greatly increased my knowledge of DNS. If you look at the list of DNS record types [0], you might be surprised at how many their are. Knowing how to use those can be a bit much.

[0] https://www.nslookup.io/learning/dns-record-types/
1 comments
teddyh 1051 days ago
> the list of DNS record types

Actually authoritative list: <https://www.iana.org/assignments/dns-parameters/dns-paramete...> That list also has linked references for each entry, whereas the list you gave only has references for 9 of the 51 types it lists.

If we exclude entries explictly marked as experimental, obsolete, deprecated, or reserved, the list you gave is still missing these:

• AMTRELAY

• ATMA

• AVC

• DOA

• EID

• GPOS

• ISDN

• L32

• L64

• LP

• MINFO

• NID

• NIMLOC

• NINFO

• PX

• RKEY

• RT

• SINK

• SPF

• TALINK

• WKS

• X25

(I know, many of these are de-facto deprecated: SPF is abandoned for TXT, GPOS was replaced by LOC, and the entire usage of WKS was obsoleted by the recommendation of RFC 1123. But they are not marked as such in the list from IANA, and I still often see SPF records in the wild.)

Also incomplete, but often has better references: <https://en.wikipedia.org/wiki/List_of_DNS_record_types>

(Not to mention TYPE, which I have also occasionally encountered.)

link
labcomputer 1051 days ago
These all seem to be super-niche or obsolete though?

* ATMA, ISDN, NIMLOC, EID, X25, are all for relatively niche or obsolete physical layer protocols (I guess ATM isn't that niche, but most people never run into it).

* WKS, PX, NID, LP, L64, L32 seem to be defined but unused in practice (I had never even heard of ILNP, which what NID, LP, L64 and L32 are for, until I googled it just now).

* RKEY, NINFO, MINFO and several others are expired without adoption or never made it to an RFC

* GPOS is an earlier version of LOC

link
teddyh 1050 days ago
> These all seem to be super-niche or obsolete though?

Yes, I wrote that in an edit soon after commenting; your comment was made hours after I made mine, so you should have seen it.

And, as I said, the SPF record, though obsolete, is still very commonly found, in my experience.

link