Reference

All functions
as.data.frame(<gdns_response>)	Coerce a gdns query response answer to a data frame
bulk_query()	Vectorized query, returning only answers in a data frame
dns_classes	DNS CLASSes (dataset)
dns_glob_names	Underscored and Globally Scoped DNS Node Names (dataset)
dns_opcodes	DNS OpCodes (dataset)
dns_rcodes	DNS RCODEs (dataset)
edns0_option_codes	DNS EDNS0 Option Codes (OPT) (dataset)
gdns	Tools to Work with Google DNS Over HTTPS API
has_spf()	Test for whether a DNS TXT record is an SPF record
is_soft_fail() is_hard_fail() passes_all()	SPF "all" type test
query() dig()	Perform DNS over HTTPS queries using Google
resource_record_tbl	An overview of resource records (RRs) permissible in zone files of the Domain Name System (DNS)
rrtypes	Resource Record (RR) TYPEs (dataset)
spf_ipv4s() spf_ipv6s() spf_includes() spf_ptrs() spf_exists()	SPF field extraction functions
split_spf()	Split out all SPF records in a domain's TXT record