Existe uma coisa chamada cache negativo. Eu acho que bateu em você ...
Para citar o artigo da wikipedia :
Some resolvers may override TTL values, as the protocol supports caching for up to 68 years or no caching at all. Negative caching, i.e. the caching of the fact of non-existence of a record, is determined by name servers authoritative for a zone which must include the Start of Authority (SOA) record when reporting no data of the requested type exists. The value of the MINIMUM field of the SOA record and the TTL of the SOA itself is used to establish the TTL for the negative answer.
Isto é o que parece aqui:
$ dig www.blanchardscoffee.com A blanchardscoffee.com A
www.blanchardscoffee.com. 3582 IN CNAME blanchardscoffee.com.
blanchardscoffee.com. 3574 IN A 173.201.180.189
blanchardscoffee.com. 3574 IN NS ns77.domaincontrol.com.
blanchardscoffee.com. 3574 IN NS ns78.domaincontrol.com.
;; Received 124 bytes from 192.168.178.1#53(192.168.178.1) in 38 ms
blanchardscoffee.com. 3574 IN A 173.201.180.189
blanchardscoffee.com. 3574 IN NS ns77.domaincontrol.com.
blanchardscoffee.com. 3574 IN NS ns78.domaincontrol.com.
;; Received 106 bytes from 192.168.178.1#53(192.168.178.1) in 2 ms