DNS zone names level restrictions

Question

I'm researching a topic, but can't find any info about it, so I decided to ask here. I read 2 RFCs, but didn't saw anything about that. I presume there is non, but I need to be sure.

Is there a limitation on the level of the DNS zone names e.g. can a DNS zone name be of sixth level domain name like sub.sub.sub.sub.sub.domain.com with its own DNS zone file of course?

Many thanks, Yani

which RFC's did you read? Because there are dozens. The earlier ones aren't too terse and quite enlightening. — HBruijn, Feb 28 '15 at 15:05
(https://www.ietf.org/rfc/rfc1034.txt) and (https://www.ietf.org/rfc/rfc1035.txt) — Yani Krystev, Feb 28 '15 at 15:44

score 4 · Accepted Answer · answered Feb 28 '15 at 17:01

RFC 1034:

To simplify implementations, the total number of octets that represent a domain name (i.e., the sum of all label octets and label lengths) is limited to 255.

So that's 253 characters for the total domain name.
That is the limit, so it's however many you can press into that.

DNS zone names level restrictions

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