PTR lookup of 'bing.com'

No PTR record :(

Unable to find any PTR-records for the specified domain/ip :(

IP lookup

bing.com
A
13.107.21.200
bing.com
AAAA
2620:1ec:c11::200
bing.com
A
204.79.197.200

PTR answers

204.79.197.200
PTR
a-0001.a-msedge.net

Log

+000
  • Resolving host 'bing.com'
+017
  • IP's found: bing.com (13.107.21.200), bing.com (204.79.197.200), bing.com (2620:1ec:c11::200)
+017
  • Multiple IPs to check - public DNS-resolvers will be used (Google and OpenDNS)
+017
  • Resolving PTR record of '13.107.21.200'
+025
  • ERRNo PTR record availible
    DNS server '208.67.220.220' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '200.21.107.13.in-addr.arpa'.
+025
  • Resolving PTR record of '204.79.197.200'
+033
  • PTR-record resolved in a total of 6ms. Responding DNS-server: 208.67.220.220.
+033
  • Resolving PTR record of '2620:1ec:c11::200'
+042
  • ERRNo PTR record availible
    DNS server '8.8.8.8' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.0.2.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.1.1.c.0.c.e.1.0.0.2.6.2.ip6.arpa'.