ru.com всё?

$ whois ru.com
...
   Registrar: GoDaddy.com, LLC
...
   Name Server: NS1.CENTRALNIC.NET
   Name Server: NS2.CENTRALNIC.NET
   Name Server: NS3.CENTRALNIC.NET
   Name Server: NS4.CENTRALNIC.NET
...

$ dig @NS2.CENTRALNIC.NET ru.com ANY
;ru.com.                                IN      ANY
ru.com.                 600     IN      RRSIG   A 7 2 600 20220105001406 20211206013217 47927 ru.com. Hi4jZ655oDfCTwH/xze70EXQPHg6Rqa+bWd5Y/3/ogs5lMRJICilRsF7 FEhsvzqDLaslD7wWq0SqS0PSSQ4tZiT7PNoHdyb2LMSZp+trwOj4DSck VfXcZqvSSOwjfZTG7pcI+GFUXmYkHpgwE4Q2B0CbkoCyd1B6W+AAQNzw Ly8=
ru.com.                 600     IN      A       141.8.226.34
ru.com.                 3600    IN      RRSIG   TXT 7 2 3600 20220104185020 20211206004712 47927 ru.com. EbPUF9KW9Wi9L/oe0OTTJHw+jhbHmfbCbjWjZ43JLDKxWoUE8s6xxK56 ml/LWgCnY5UGCdbBZtTi5ZJ4yez3pmn/iQxILF6+i5Z0vv0HE4EweTut Ex33jw9B7IXBS48CIFlFira5kqeEyjQ2/tqYmbheaMAyOuHF0kt8MKHF AZc=
ru.com.                 3600    IN      TXT     "v=spf1 include:relay.emailme.com -all"
ru.com.                 3600    IN      TXT     "google-site-verification=7b4YoHtJOC4W9NpIyOu-Yg6WxaJdIjDdhC9hKr1WVxI"
ru.com.                 3600    IN      TXT     "C0E0N41352"
ru.com.                 3600    IN      RRSIG   NS 7 2 3600 20220104204357 20211205114751 47927 ru.com. jD16vai0giu8fzrTJtNxjqDIhK4ULlr4Q+VeqKJboR8EBvrUdH6E0oAK 8rR3vx5ds1EbgG18m+z9Z8CQw5CuNDwc+1HNdIvUogF4HsJZzwLS91ok PmKIXXNc0pEQzgevUUBmo7hh1ZOUuCuUz6WcpMfqAYCy/jB7pavg/q3N VyY=
ru.com.                 3600    IN      NS      ns1.centralnic.net.
ru.com.                 3600    IN      NS      ns2.centralnic.net.
ru.com.                 3600    IN      NS      ns4.centralnic.net.
ru.com.                 3600    IN      NS      ns3.centralnic.net.
ru.com.                 0       IN      RRSIG   NSEC3PARAM 7 2 0 20220105073317 20211206002755 47927 ru.com. ARJgL4aUmGBg2PumBP0F+tr4cBvNQTZ673Nxll4TPnW08r2LXHE04pDA 3thIIHRDyWMBPg1jLdAA3MEMwsWhg9dRisGsHVk18MuTAeusrgLlPdDk 6hCgITiuBhtTo3Bd05jdtnQ083N8oHYRIVzDgUiXkWxh6mafuYbV0GEW cug=
ru.com.                 0       IN      NSEC3PARAM 1 0 1 -
ru.com.                 3600    IN      RRSIG   DNSKEY 7 2 3600 20211219013836 20211118150802 30236 ru.com. rClWMImivPsP+WbmbfETChsnWxA7fZi/30Hcby/pirGGGUbAgYn7XZGd IiYEQqQTKxPM1mqGuEZVveFGw5RKMEtj4JxwfOydF02TQsyQ3tV9umLB /02etzCk2TKGyWmBdPMGDTUteix6Cp5y1sqNZtKY7/VyR2ki4h+WB5Qm 4HJuC/UB99gGzMaWIay7AHQzx52g4zH6jcyLd//ZkPTfpZCtMfYsQY0i IyX1x4lhXj3TvYavaM6YVNxEJFt+sjFTqiGPFMiUdAFUg/+DxiG1ecqX hPyU7bfwaclH7eyI7C1lc9OjXVBiepI0DPRsVcZS2MyvpBh6sI6yKTjd dBZ6aQ==
ru.com.                 3600    IN      DNSKEY  256 3 7 AwEAAbm6DCestaXDsFRCKG2OU2FdZy4f4X29Ele+Jhs/cc05NI7Ud2OR Z6tI8nQmzgEMrPTgZ59YiQn6DTGRgHXq5YoPJOcNGAwefeBYAsfEmog8 5pG6d1JBTrJtJ3WCNH77jmXc+1FJYM9iaUu7EcK7I065iL/r2lHuxCMT NM6i8Zt5
ru.com.                 3600    IN      DNSKEY  256 3 7 AwEAAbQB1WOViMAbaH12+pJ6ZLB8THch77WtcqEJLjOZVF1sp13ZUlmh nSW83Ir+NosqnSQHADHBkBGhXIEhzH7C1E3B1Id/mLc5An6vGoL/U9kz oJNmCUMmLYILCHfmwP2l1UFE1N+GUgUBpuEHEBpc+WxyNYbdubMoyQWE PGF0wrJl
ru.com.                 3600    IN      DNSKEY  257 3 7 BQEAAAABwOerKVU3Pz17LgbZLlBbaRPsu6uR5UL8jfaEEbAlsqSDkDnS LaqkSj58JRqVsPIQ3f1nWIH2I7mF2saDgkeKQPtZJ2jtx3mZkKxRNqyf rHDAQr+ae9Mw21s8ovVlDKJmkVFb6gbY9bgi1eRFzo1RJke5AR5jPkPH +tLLjlJpoLdZIRtwt/N0PiaL9NYkhxjCNLietCVeRuOVWtOzwNtObn72 jo1hkvjafBwhJDnBYDbNXatJoJiwfeXlYN30TVY2ATRuOlPKj6BdL+pj kxgNVBxKypzjU13tzbAeZCWjoOaOy2lvUphTFVxljt1NEoqj5JPhMyiu 42o6yNBFfeFaqQ==
ru.com.                 3600    IN      RRSIG   SOA 7 2 3600 20220109071042 20211210000645 47927 ru.com. Orw0lp6X+Xjgi6WTArQbEdw6G6sBgpXzkNssDLhlP7NjZS0UP2njK0Sh ZDTteiFcegJHLL22aOqF5L9p322wIpKu2mdWO+p3Sdc5Co8P50KQoFaS V+GKZuELoCBodZyA/rhIncJSCnk2cJFE10ASZjc0Llcudriw0hhoZIzR OZw=
ru.com.                 3600    IN      SOA     ns0.centralnic.net. hostmaster.centralnic.net. 3000497763 900 1800 6048000 3600

pinkbyte@oas1 ~ $ nslookup -type=soa ru.com 8.8.8.8 
Server:         8.8.8.8
Address:        8.8.8.8#53

Non-authoritative answer:
ru.com
        origin = ns0.centralnic.net
        mail addr = hostmaster.centralnic.net
        serial = 3000497775
        refresh = 900
        retry = 1800
        expire = 6048000
        minimum = 3600

Authoritative answers can be found from:

pinkbyte@oas1 ~ $ nslookup ns0.centralnic.net 8.8.8.8
Server:         8.8.8.8
Address:        8.8.8.8#53

Non-authoritative answer:
Name:   ns0.centralnic.net
Address: 193.105.170.150
Name:   ns0.centralnic.net
Address: 2001:67c:2630::1701:150

pinkbyte@oas1 ~ $ nslookup test.ru.com 8.8.8.8
Server:         8.8.8.8
Address:        8.8.8.8#53

** server can't find test.ru.com: NXDOMAIN

pinkbyte@oas1 ~ $ nslookup www.ru.com 8.8.8.8
Server:         8.8.8.8
Address:        8.8.8.8#53

Non-authoritative answer:
Name:   www.ru.com
Address: 212.18.250.171