"The length limit of a DNS TXT record is 255 characters."
Nope. That's the maximum length of a TXT record string. TXT record strings with the same owner name get concatenated together. The maximum for a TXT record is 65,280 octets (which may or may not translate into characters depending on encoding).
Also, you probably want to think about the implications of caching and TTL.
Nope. That's the maximum length of a TXT record string. TXT record strings with the same owner name get concatenated together. The maximum for a TXT record is 65,280 octets (which may or may not translate into characters depending on encoding).
Also, you probably want to think about the implications of caching and TTL.