Strange characters returned in answer rdata field.

[lanhampr]

The rdata field has some strange characters.

[answer] => Array ( [0] => Net_DNS2_RR_SOA Object ( [name] => 211.246.216.in-addr.arpa [type] => SOA [class] => IN [ttl] => 3600 [rdlength] => 50 [rdata] => ns1 clearnetworxnetadmin?:x?-?*0 ݀ [mname] => ns1.clearnetworx.net [rname] => admin.clearnetworx.net [serial] => 2024091102 [refresh] => 10800 [retry] => 3600 [expire] => 777600 [minimum] => 3600 )

    )