77.10.pool.telefonica.de has no SRV records.
Question and response
Question
dig 77.10.pool.telefonica.de. SRV
Answer
The response has no answer records.
Authority
77.10.pool.telefonica.de. 600 SOA ns1.telefonica.de. hostmaster.telefonica.de. 153 28800 7200 604800 600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0