THE RECORDS BEHIND THE NAME

DNS lookup.

Explore resource records, mail routing and reverse DNS.

Public IPs automatically use PTR. Common records queries A, AAAA, MX, NS, CNAME, TXT, SOA and CAA separately.

DNS

mail-bn1pr21cu00100.inbound.protection.outlook.com

1 answer records
Google Public DNS · HTTPS2026-09-20T16:18:27+00:00View JSON
ANOERROR · no answersAD noResponse from 150.171.10.33.
AAAANOERRORAD noResponse from 2603:1061:0:10::21.
MXNOERROR · no answersAD noResponse from 150.171.10.33.
NSNOERROR · no answersAD noResponse from 2620:1ec:8ec:10::21.
CNAMENOERROR · no answersAD noResponse from 150.171.16.33.
TXTNOERROR · no answersAD noResponse from 2620:1ec:bda:10::21.
SOANOERROR · no answersAD noResponse from 2620:1ec:8ec:10::21.
CAANOERROR · no answersAD noResponse from 2a01:111:4000:10::21.

AD indicates that the resolver reports DNSSEC-validated data. “AD no” can also mean the zone is unsigned. NXDOMAIN is a DNS result, not a domain-availability check.

TypeNameTTL · secondsValueLook up
AAAAmail-bn1pr21cu00100.inbound.protection.outlook.com3002a01:111:f403:f908::IP WHOIS →
Authority records · 1
TypeNameTTL · secondsValueLook up
SOAinbound.protection.outlook.com60ns1-33.azure-dns.com. hostmaster.o365filtering.com. 2022134399 300 900 1209600 60

Queries are sent to Google Public DNS over HTTPS. Results reflect its public DNS view and cache; they may differ from your local network. TXT strings retain their DNS quoting. Common records does not enumerate every name or record in a zone.