_spf.credit-suisse.com has no NS records.
NS records for this zone are defined at credit-suisse.com.
NS records for this zone are defined at credit-suisse.com.
Question and response
Question
dig _spf.credit-suisse.com. NS
Answer
The response has no answer records.
Authority
credit-suisse.com. 30 SOA uranus.ubs.com. ncc-internet.ubs.com. 9038 10800 3600 2592000 30
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0